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Electric Motor Bases | Electric Motor Base Types


Electric Motor Slide Base


Our High-quality and high-strength steel electric motor slide bases are dimensionally universal with other manufacturers' brands and can be used to mount NEMA standard electric motors. The high-strength steel base is coated with a premium primer and is made to be rugged, and long-lasting. The slide-base design simplifies the adjustment, alignment, and positioning for electric motors. They are ideal for fine motor positioning, tightening of belts, and alignment applications. All of our slide bases are supplied with washers, and all D-Bolts (motor mounting bolts) are welded into the exact foot pattern of the motor and position to prevent spinning and dropping from slots while also making it easier for motor installation.
Note: Single Adjusting Screws For Frame Sizes 56-145T / Double Adjusting Screws For Frame Sizes 182T-505T

Motor Slide Base Dimensions

56-145T Slide Bases:

Frame
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(I)
(J)
(K) mm
(L)
(M)
(N)
Weight (LBS)
56 10.625" 6.5" 1.125" 4.5" 2.4375" 1.5" 3.8125" 2.875" 0.375" 3" 2mm 0.875" 5/16 X 1 3/8 X 4 3
143T 10.5" 7.5" 1.125" 5.5" 2.75" 2" 3.75" 3.375" 0.375" 3" 3mm 0.8125" 5/16 X 1 3/8 X 4 6
145T 10.5" 8.5" 1.125" 6.5" 2.75" 2.5" 3.75" 3.875" 0.375" 3" 3mm 0.8125" 5/16 X 1 3/8 X 4 7
182T-505T Slide Bases:

Frame
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(I)
(J)
(K) mm
(L)
(M)
(N)
(W)
Weight (LBS)
182T 12.75" 9.50" 1.50" 6.50" 3.75" 2.25" 4.50" 4.25" 0.5" 3" 3.5mm 1.5" 3/8 X 1-3/4 1/2 X 6 4.5" 10
184T 12.75" 10.5" 1.5" 7.5" 3.75" 2.75" 4.5" 4.75" 0.5" 3" 3.5mm 1.5" 3/8 X 1-3/4 1/2 X 6 5.5" 10
213T 15" 11" 1.75" 7.5" 4.25" 2.75" 5.25" 4.75" 0.5" 3.5" 3.8mm 1.5" 3/8 X 1-3/4 1/2 X 6 5.5" 15
215T 15" 12.5" 1.75" 9" 4.25" 3.5" 5.25" 5.5" 0.5" 3.5" 3.8mm 1.5" 3/8 X 1-3/4 1/2 X 6 7" 17
254T 17.75" 15.125" 2" 10.75" 5" 4.125" 6.25" 6.625" 0.625" 4" 4.6mm 1.4375" 1/2 X 1-3/4 5/8 X 6 5.3125" 19
256T 17.75" 16.875" 2" 12.5" 5" 5" 6.25" 7.5" 0.625" 4" 4.6mm 1.4375" 1/2 X 1-3/4 5/8 X 6 7" 20
284T 19.75" 16.875" 2" 12.5" 5.5" 4.75" 7" 7.5" 0.625" 4.5" 4.6mm 1.6875" 1/2 X 2 5/8 X 6 7" 24
286T 19.75" 18.375" 2" 14" 5.5" 5.5" 7" 8.25" 0.625" 4.5" 4.6mm 1.6875" 1/2 X 2 5/8 X 6 8" 25
324T 22.75" 19.25" 2.5" 14" 6.25" 5.25" 8" 8.5" 0.75" 5.25" 4.6mm 2.1875" 5/8 X 2-1/2 3/4 X 9 7" 35
326T 22.75" 20.75" 2.5" 15.5" 6.25" 6" 8" 9.25" 0.75" 5.25" 4.6mm 2.1875" 5/8 X 2-1/2 3/4 X 9 8.5" 36
364T 25.5" 20.5" 2.5" 15.5" 7" 5.625" 9" 9.125" 0.75" 6" 5.8mm 2.0625" 5/8 X 2-1/2 3/4 X 9 7.75" 49
365T 25.5" 20.5" 2.5" 16.5" 7" 6.125" 9" 9.625" 0.75" 6" 5.8mm 2.0625" 5/8 X 2-1/2 3/4 X 9 8.75" 50
404T 28.75" 22.375" 3" 16.5" 8" 6.125" 10" 9.875" 0.875" 7" 5.8mm 2.5" 3/4 X 3 3/4 X 11 8.75" 66
405T 28.75" 23.875" 3" 18" 8" 6.875" 10" 10.625" 0.875" 7" 5.8mm 2.5" 3/4 X 3 3/4 X 11 10.25" 68
444T 31.25" 24.625" 3" 19.25" 9" 7.25" 11" 11" 0.875" 7.5" 5.8mm 2.5" 3/4 X 3 3/4 X 11 11" 74
445T 31.25" 26.625 3" 21.25" 9" 8.25" 11" 12" 0.875" 7.5" 5.8mm 2.5" 3/4 X 3 3/4 X 11 13" 76
447T 31.25" 30.125" 3" 24.75" 9" 10" 11" 13.75" 0.875" 7.5" 8mm 3" 3/4 X 3-1/2 3/4 X 11 16.5" 102
449T 31.25" 35.125" 3" 29.75" 9" 12.5" 11" 16.25" 0.875" 7.5" 8mm 3" 3/4 X 3-1/2 3/4 X 11 21.5" 105
505T 35" 30" 3.5" 22.75" 10" 9" 12.5" 13.5" 1" 8" 8mm 3" 7/8 X 3-1/2 7/8 X 12 14.5" 137

Heavy Duty Adjustable Motor Bases


Some applications require a base that is heavier duty than the "standard" because of this we supply a heavy-duty sliding adjustable motor base for NEMA frame sizes 254 - 449. These bases utilize special gussets and cross braces together that are made from heavier duty and stronger material with characteristics to handle motors in the 3000 - 7000 pound weight class.
A2HD Heavy Duty Motor Base Sizes:

Base # (AL) (AM) (AX) (BB) (E) (F) (AO) (AR) (AU) (BT) (AT) (XC) D-BOLT AY-BOLT
182A2HD 12.75" 9.5" 1.5" 6.63" 3.75" 2.25" 4.5"
2.25" 0.5" 3" 0.19" 1.19" 3/8X1-1/2 1/2X6
184A2HD 12.75" 10.5" 1.5" 7.63" 3.75" 2.75" 4.5" 4.75" 0.5" 3" 0.19" 1.19" 3/8X1-1/2 1/2X6
213A2HD 15" 11" 1.75" 7.69" 4.25" 2.75" 5.25" 4.75" 0.5" 3.5" 0.25" 1.13" 3/8X1-1/2 1/2X6
215A2HD 15" 12.5" 1.75" 9.19" 4.25" 3.5" 5.25" 5.5" 0.5" 3.5" 0.25" 1.13" 3/8X1-1/2 1/2X6
C2HD Heavy Duty Motor Base Sizes:

Part # NEMA Frame (AL) (AM) (AX) (BB) (E) (F) (AO) (AR) (AU) (BT) (AT) (XC) (D-BOLT) (AY-BOLT) Weight (LBS)
254C2HD 254 17.75" 15.125" 2" 11" 5" 4.125" 6.25" 6.625" 0.625" 4" 0.3125" 1.25" 1/2 X 1-3/4 5/8 X 9 32
256C2HD 256 17.75" 16.875" 2" 12.75" 5" 5" 6.25" 7.5" 0.625" 4" 0.3125" 1.25" 1/2 X 1-3/4 5/8 X 9 33
284C2HD 284 19.75" 16.875" 2" 12.75" 5.5" 4.75" 7" 7.5" 0.625" 4.5" 0.3125" 1.5" 1/2 X 2 5/8 X 9 35
286C2HD 286 19.75" 18.375" 2" 14.25" 5.5" 5.5" 7" 8.25" 0.625" 4.5" 0.3125" 1.5" 1/2 X 2 5/8 X 9 35
324C2HD 324 22.75" 19.25" 2.5" 14.375" 6.25" 5.25" 8" 8.5" 0.75" 5.25" 0.375" 1.9375" 5/8 X 2-1/2 3/4 X 11 59
326C2HD 326 22.75" 20.75" 2.5" 15.875" 6.25" 6" 8" 9.25" 0.75" 5.25" 0.375" 1.9375" 5/8 X 2-1/2 3/4 X 11 60
364C2HD 364 25.5" 20.5" 2.5" 15.75" 7" 5.625" 9" 9.125" 0.75" 6" 0.375" 1.9375" 5/8 X 2-1/2 3/4 X 11 67
365C2HD 365 25.5" 21.5" 2.5" 16.75" 7" 6.125" 9" 9.625" 0.75" 6" 0.375" 1.9375" 5/8 X 2-1/2 3/4 X 11 68
404C2HD 404 28.75" 22.375" 3" 17.125" 8" 6.125" 10" 9.875" 0.875" 7" 0.375" 1.4375" 3/4 X 3 3/4 X 14 94
405C2HD 405 28.75" 23.875" 3" 18.625" 8" 6.875" 10" 10.625" 0.875" 7" 0.375" 1.4375" 3/4 X 3 3/4 X 14 99
444C2HD 444 31.25" 24.625" 3" 19.375" 9" 7.25" 11" 11" 0.875" 7.5" 0.375" 1.4375" 3/4 X 3 3/4 X 14 103
445C2HD 445 31.25" 26.625" 3" 21.375" 9" 8.25" 11" 12" 0.875" 7.5" 0.375" 1.4375" 3/4 X 3 3/4 X 14 105
447C2HD 447 31.25" 30.125" 3" 24.875" 9" 10" 11" 13.75" 0.875" 7.5" 0.375" 1.4375" 3/4 X 3 3/4 X 14 110
449C2HD 449 31.25" 35.125" 3" 29.875" 9" 12.5" 11" 16.25" 0.875" 7.5" 0.375" 1.4375" 3/4 X 3 3/4 X 14 115

Automatic Electric Motor Base

Utilizing a premium Overly Hautz automatic motor base not only saves cost on maintenance labor, but also provides a better wear life on belts, motor, and bearings. With utilizing an automatic motor base you also increase efficiency and optimal belt tension for the best belt performance! We also stock a full line of v-belts and sheaves. These bases are offered for pretty much any standard motor frame size and can even be used in problem-solving applications or heavy-duty applications such as rock crushers, shakeouts, vibrating screens, and fans.
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600 Series Automatic Motor Base


600-series bases are designed for motors that have a fixed diameter pulley and is supplied for NEMA frame sizes 48 to 286. These bases automatically compensate for variations in load, expansion of belts in the result from centrifugal force and normal belt stretch.
NOTE: A verticle base should be specified where the rails of the base are to be inclined at an angle of 30° or more from the horizontal, and where the motor shaft is higher than the driven shaft.
Horizontal Bases:

Base # NEMA Frame Equivalent Max. Motor Weight (LBS) Min. Pulley Dia. (A) (B) (B1) (C) (E) (F) Min. (F) Max. (G + 1/32) (H) (J) (K) (L) (M) Weight (LBS)
601 48-56 50 2" 6.125" 5.875" 6.125" 0.5" 4.875" 2.5" 3.5" 7" 0.34375" 9.5" 2.125" 8.5" 1.375" 5
603 66 70 2" 7.375" 8.125" 6.375" 0.625" 5.875" 4.375" 5.625" 8.75" 0.40625" 11.25" 2.625" 10.25" 1.375" 6
605 143-145 90 2" 7" 8.25" 8.50" 0.625" 5.5" 3.875" 5.125" 8.375" 0.40625" 11.6875" 3" 10.375" 1.875 10
607 182-184 110 2.5" 9" 9.375" 9.625" 0.625" 7.5" 4.375" 5.625" 10.25" 0.40625" 14.0625" 3" 12.5" 2.125" 18
613 213-215 175 3" 10.5" 11.375" 11.75" 0.875" 8.5" 5.375" 7.125" 11.75" 0.40625" 166.375" 3.5" 14.5" 2.5625" 30
621 254-256 280 4" 12.5" 15.25" 15.5" 1" 10" 8.125" 10.125" 14.375" 0.5625" 19.5" 4" 17.125" 3.125" 50
623 284-286 400 4.5" 14" 16.75" 17" 1" 11" 9.125" 11.125" 17" 0.5625" 22.125" 5" 19.75" 3.1875" 65
Vertical Bases:

Base # NEMA Frame Equivalent Max. Motor Weight (LBS) Min. Pulley Dia. (A) (B) (B1) (C) (E) (F) Min. (F) Max. (G + 1/32) (H) (J) (K) (L) (M) Weight (LBS)
602 48-56 50 2" 6.125" 5.875" 6.125" 0.5" 4.875" 2.5" 3.5" 7" 0.34375" 9.5" 2.125" 8.5" 1.375" 5
604 66 70 2" 7.375" 8.125" 6.375" 0.625" 5.875" 4.375" 5.625" 8.75" 0.40625" 11.25" 2.625" 10.25" 1.375" 6
606 143-145 90 2" 7" 8.25" 8.50" 0.625" 5.5" 3.875" 5.125" 8.375" 0.40625" 11.6875" 3" 10.375" 1.875 10
608 182-184 110 2.5" 9" 9.375" 9.625" 0.625" 7.5" 4.375" 5.625" 10.25" 0.40625" 14.0625" 3" 12.5" 2.125" 18
614 213-215 175 3" 10.5" 11.375" 11.75" 0.875" 8.5" 5.375" 7.125" 11.75" 0.40625" 166.375" 3.5" 14.5" 2.5625" 30
622 254-256 280 4" 12.5" 15.25" 15.5" 1" 10" 8.125" 10.125" 14.375" 0.5625" 19.5" 4" 17.125" 3.125" 50
624 284-286 400 4.5" 14" 16.75" 17" 1" 11" 9.125" 11.125" 17" 0.5625" 22.125" 5" 19.75" 3.1875" 65
DX-900 Series Automatic Motor Base

The DX-900 series automatic motor bases provide excellent performance for applications where pumps, fans, blowers, and similar equipment are involved. These bases are made for NEMA frame sizes 325 - 447 up to 200 HP and with fixed diameter pulleys of 7" or larger.
Note: In applications that are subject to vibration or severe shock loads such as foundry shake-outs, vibrating feeders, crushers, vibrating screens and similar types of equipment, the DD-1100 series bases should be used.
Horizontal Bases:

Base # NEMA Frame Equivalent Capacity HP @ 1800 or Equivalent Min. Pulley Dia. (A) (A1) (B) (D) (E) (F1) (F2) (G) (H) (K) (L) (M) (R) (S) Weight (LBS)
DX925 324-326 50 7" 16" 18.25" 19.125" 11" 12.5" 10.5" 12" 26.75" 0.6875" 5" 29.25" 4.0625" 1.3125" 2.75" 140
DX927 364-365 75 9" 18" 20.25" 20" 12" 14" 11.25" 12.25" 29.5" 0.6875" 5.75" 32" 4.0625" 1.3125" 2.75" 165
DX929 404-405 100 11" 20" 22.5" 22.25" 13" 16" 12.25" 13.75" 32" 0.8125" 6" 34.5" 4.125" 1.25" 2.875" 215
DX931 444-445 150 11" 22" 24.5" 24.875" 15.75" 18" 14.5" 16.5" 35" 0.8125" 7" 37.5" 4.25" 1.125" 3.125"
250
DX933 447 200 11" 22" 24.25" 27.875" 20" 18" 20" 20" 35" 0.8125" 7.25" 37.5" 4.1875" 1.1875" 3" 335
Vertical Bases:

Base # NEMA Frame Equivalent Capacity HP @ 1800 or Equivalent Min. Pulley Dia. (A) (A1) (B) (D) (E) (F1) (F2) (G) (H) (K) (L) (M) (R) (S) Weight (LBS)
DX926 324-326 50 7" 16" 18.25" 19.125" 11" 12.5" 10.5" 12" 26.75" 0.6875" 5" 29.25" 4.0625" 1.3125" 2.75" 160
DX928 364-365 75 9" 18" 20.25" 20" 12" 14" 11.25" 12.25" 29.5" 0.6875" 5.75" 32" 4.0625" 1.3125" 2.75" 175
DX930 404-405 100 11" 20" 22.5" 22.25" 13" 16" 12.25" 13.75" 32" 0.8125" 6" 34.5" 4.125" 1.25" 2.875" 245
DX932 444-445 150 11" 22" 24.5" 24.875" 15.75" 18" 14.5" 16.5" 35" 0.8125" 7" 37.5" 4.25" 1.125" 3.125"
275
DX934 447 200 11" 22" 24.25" 27.875" 20" 18" 20" 20" 35" 0.8125" 7.25" 37.5" 4.1875" 1.1875" 3" 370

DD-1100 Series Automatic Motor Base


For the heavy shock-load applications that are using NEMA motor frame sizes 213 - 447 up to 500 hp and fixed diameter pulleys of 4" or more the DD-1100 series motor bases are the perfect match. These automatic motor basis really perform in applications such as rock crushers, foundry shake-outs, compressors, vibrating screens, and similar equipment.
NOTE: Motor bases larget than 447T frame sizes are built to order.
Horizontal Bases:

Base # NEMA Frame Equivalent Capacity HP @ 1800 or Equivalent Min. Pulley Dia. (A) (A1) (B) (D) (E) (F1) (F2) (G) (H) (K) (L) (M) (R) (S) Weight (LBS)
DD1113 213-215 10 4" 10.5" 13.125 13.25" 6.25" 8.5" 5.5" 7" 21.75" 0.40625" 5.875" 24" 3.25" 0.75" 2.5" 60
DD1121 254-256 20 4.5" 12.5" 15.125" 16.5" 9.5" 10" 8.25" 10" 24.75" 0.5625" 6.875" 27" 3.625" 0.875" 2.75" 75
DD1123 284-286 30 5.5" 14" 16.25" 17.625" 10.25" 11" 9.5" 11" 26" 0.5625" 7" 28.25" 3.6875" 0.8125" 2.875" 90
DD1125 324-326 50 7" 16" 18.25" 19.5" 11" 12.5" 10.5" 12" 28.5" 0.6875" 6.75" 31" 4.125" 1.25" 2.875" 155
DD1127 364-365 75 9" 18" 20.25" 20" 12" 14" 11.25" 12.25" 30.5" 0.6875" 6.75" 33" 4.125" 1.25" 2.875" 185
DD1129 404-405 100 10" 20" 22.5" 22.25" 13" 16" 12.25" 13.75" 33" 0.8125" 7" 35.5" 4.3125" 1.0625" 3.25" 245
DD1131 444-445 150 11" 22" 24.25" 24.875" 15.75" 18" 14.5" 16.5" 35" 0.8125" 7.25" 37.5" 4.1875" 1.1875" 3" 320
DD1133 447 200 11" 22" 24.25" 27.875" 20" 18" 20" 20" 35" 0.8125" 7" 37.5" 4.3125" 1.0625" 3.25" 450
Vertical Bases:

Base # NEMA Frame Equivalent Capacity HP @ 1800 or Equivalent Min. Pulley Dia. (A) (A1) (B) (D) (E) (F1) (F2) (G) (H) (K) (L) (M) (R) (S) Weight (LBS)
DD1114 213-215 10 4" 10.5" 13.125 13.25" 6.25" 8.5" 5.5" 7" 21.75" 0.40625" 5.875" 24" 3.25" 0.75" 2.5" 70
DD1122 254-256 20 4.5" 12.5" 15.125" 16.5" 9.5" 10" 8.25" 10" 24.75" 0.5625" 6.875" 27" 3.625" 0.875" 2.75" 80
DD1124 284-286 30 5.5" 14" 16.25" 17.625" 10.25" 11" 9.5" 11" 26" 0.5625" 7" 28.25" 3.6875" 0.8125" 2.875" 100
DD1126 324-326 50 7" 16" 18.25" 19.5" 11" 12.5" 10.5" 12" 28.5" 0.6875" 6.75" 31" 4.125" 1.25" 2.875" 175
DD1128 364-365 75 9" 18" 20.25" 20" 12" 14" 11.25" 12.25" 30.5" 0.6875" 6.75" 33" 4.125" 1.25" 2.875" 195
DD1130 404-405 100 10" 20" 22.5" 22.25" 13" 16" 12.25" 13.75" 33" 0.8125" 7" 35.5" 4.3125" 1.0625" 3.25" 270
DD1132 444-445 150 11" 22" 24.25" 24.875" 15.75" 18" 14.5" 16.5" 35" 0.8125" 7.25" 37.5" 4.1875" 1.1875" 3" 360
DD1134 447 200 11" 22" 24.25" 27.875" 20" 18" 20" 20" 35" 0.8125" 7" 37.5" 4.3125" 1.0625" 3.25" 480

700 Series Automatic Motor Base


700 series bases are used with NEMA frame sizes 56- 326 electric motors equipped with spring-loaded variable-pitch pulleys. This base is designed to quickly and easily move the motor during operation to increase or decrease the center distance between pulleys.
Note 1: Size 725 has one adjusting screw. Size 726 has two adjusting screws connected by a chain. Adjusting screws are normally equipped with heavy hex nuts. Cranks will be provided only when requested, and at an additional cost.
Note 2: For installation requiring automatic motor control, where the adjusting screw is rotated by a motor, see bulletin for the 1400-series.
Note 3: Bases for larger motors are built to order. Bases for motors equipped with variable pitch pulleys, having one movable flange are described in the bulletin for the 800-series.

Horizontal Bases:

Base # NEMA Frame Equivalent Max. Motor Weight (LBS) (A) (B) (B1) (C) (D) (E) (F1) (F2) (G + 0.03125") (H) (K) (L) (M) (N) (P) (Q) (R) Weight (LBS)
701 56 50 6.125" 5.785" 6.125" 0.5" -- 4.875" 2.5" 3.5" 9.25" 0.34375" 4.375" 10.75" 1.375" 0.75" 0.4375" 0.5625" 0.3125" 5
703 66 70 7.375" 8.125" 6.375" 0.625" -- .875" 4.375" 5.625" 11" 0.40625" 4.875" 12.5" 1.375" 0.75" 0.4375" 0.5625" 0.3125" 6
705 143-145 90 7" 8.25" 8.5" 0.625" -- 5.5" 3.875" 5.125" 10.375" 0.40625" 5" 12.375" 1.875" 1.0625" 0.5625" 0.6875" 0.4375" 10
707 182-184 110 9" 9.375" 9.625" 0.625" -- 7.5" 4.375" 5.625" 13.125" 0.40625" 5.875" 15.375" 2.15625" 1.21875" 0.75" 0.875" 0.34375" 18
713 213-215 175 10.5" 11.375" 11.75" 0.875" -- 8.5" 5.375" 7.125" 14.25" 0.40625" 6" 17" 2.5625" 1.4375" 1.3125" 1" 0.4375" 32
721 254-256 280 12.5" 15.25" 15.5" 1" -- 10" 8.125" 10.125" 17.375" 0.5625" 7" 20.125" 3.125" 1.75" 1.625" 1.25" 0.5" 48
723 284-286 400 14" 16.75" 17" 1" -- 11" 9.125" 11.125" 20" 0.5625" 8" 22.75" 3.15625" 1.78125" 1.625" 1.25" 0.53125" 65
725 324-326 600 18.25" 18.75" 19.125" 1" 11" 12.5" 10.5" 12" 23.5" 0.6875" 7.25" 27" 5.125" 3.75" 1.625" 1.25" 2.375" 120
Vertical Bases:

Base # NEMA Frame Equivalent Max. Motor Weight (LBS) (A) (B) (B1) (C) (D) (E) (F1) (F2) (G + 0.03125") (H) (K) (L) (M) (N) (P) (Q) (R) Weight (LBS)
726 324-326 600 18.25" 18.75" 19.125" 1" 11" 12.5" 10.5" 12" 23.5" 0.6875" 7.25" 27" 5.125" 3.75" 2.5" 1.25" 2.375" 120

Type 2B Standard Motor Bases


These special bases are manufactured from high-strength steel and feature a movable plate to carry the motor and tapped holes for hold-down bolts, which eliminates lifting the motor over studs. This base was initially designed for variable speed power transmission drives but is now in a wide range of additional applications.

Size NEMA Frame Travel (A) (B) (C) (D) (E) (F) (G) (H) (K) (L) (M) (N) (P) (Q) (R) (S) (U) (Z)
50A213 213 4.75" 11.25" 10.75" 9.375" 7.4375" 7" 0.375" 10.25" 2.0625" 8.5" 1.125" 2" 3.5" 1.75" 0.375" 0.375" 0.125" 1.65625" 1.6875"
50A215 215 4.75" 11.25" 10.75" 9.375" 7.4375" 7" 0.375" 10.25" 2.0625" 8.5" 1.125" 3.5" 3.5" 1.75" 0.375" 0.375" 0.125" 1.65625" 1.6875"
50A182 182 4.75" 11.25" 10.75" 9.375" 7.4375" 7" 0.375" 10.25" 2.0625" 7.5" 1.625" 2.75" 1.75" 1.75" 0.375" 0.375" 0.125" 1.65625" 1.6875"
50A184 184 4.75" 11.25" 10.75" 9.375" 7.4375" 7" 0.375" 10.25" 2.0625" 7.5" 1.625" 2.75" 2.75" 1.75" 0.375" 0.375" 0.125" 1.65625" 1.6875"
100A254 254 4.75" 13.5" 13" 12.8125" 8.25" 10" 0.5" 14.25" 2.375" 10" 1.5" 3.25" 5" 2" 0.625" 0.375" 0.1875" 2.375" 2.5"
100A256 256 4.75" 13.5" 13" 12.8125" 8.25" 10" 0.5" 14.25" 2.375" 10" 1.5" 5" 5" 2" 0.625" 0.375" 0.1875" 2.375" 2.5"
100A213 213 4.75" 13.5" 13" 12.8125" 8.25" 10" 0.375" 14.25" 2.375" 8.5" 2.25" 2.75" 2.75" 2" 0.625" 0.4375" 0.1875" 2.375" 2.5"
100A215 215 4.75" 13.5" 13" 12.8125" 8.25" 10" 0.375" 14.25" 2.375" 8.5" 2.25" 3.5" 3.5" 2" 0.625" 0.4375" 0.1875" 2.375" 2.5"
200A284 284 6.875" 16.75" 16.25" 15.8125" 11.5" 12" 0.5" 17.25" 3.375" 11" 2.625" 5.25" 4.25"
2.25" 0.625" 0.25" 0.1875" 2.375" 2.5"
200A286 286 6.875" 16.75" 16.25" 15.8125" 11.5" 12" 0.5" 17.25" 3.375" 11" 2.625" 5.25" 5.75" 2.25" 0.625" 0.25" 0.1875" 2.375" 2.5"
200A324 324 6.875" 16.75" 16.25" 15.8125" 11.5" 12" 0.625" 17.25" 3.375" 12.5" 1.875" 4.5" 6" 2.25" 0.625" 0.8125" 0.1875" 2.375" 2.5"
200A326 326 6.875" 16.75" 16.25" 15.8125" 11.5" 12" 0.625" 17.25" 3.375" 12.5" 1.875" 6" 6" 2.25" 0.625" 0.8125" 0.1875" 2.375" 2.5"
200A254 254 6.875" 16.75" 16.25" 15.8125" 11.5" 12" 0.5" 17.25" 3.375" 10" 3.125" 4.75" 3.5" 2.25" 0.625" 0.25" 0.1875" 2.375" 2.5"
200A256 256 6.875" 16.75" 16.25" 15.8125" 11.5" 12" 0.5" 17.25" 3.375" 10" 3.125" 4.75" 5.25" 2.25" 0.625" 0.25" 0.1875" 2.375" 2.5"
300A364 364 6.25" 18.875" 18.25" 16.3125" 11.875" 12.25" 0.625" 18.125" 3.25" 14" 2.125" 5.125" 6.125" 2.5" 0.625" 0.25" 0.25" 3.1875" 3.625"
300A365 365 6.25" 18.875" 18.25" 16.3125" 11.875" 12.25" 0.625" 18.125" 3.25" 14" 2.125" 6.125" 6.125" 2.5" 0.625" 0.25" 0.25" 3.1875" 3.625"
300A324 324 6.25" 18.875" 18.25" 16.3125" 11.875" 12.25" 0.625" 18.125" 3.25" 12.5" 2.875" 5.625" 4.875" 2.5" 0.625" 0.25" 0.25" 3.1875" 3.625"

Type 4B Heavy-Duty Motor Bases


The 4B bases are a heavy-duty base designed for applications that require ease in motor adjustment without having to deal with the task of loosening the mounting bolts.

SIZE NEMA Frame Weight (LBS) (A) (B) (C) (D) (E) (F) (G) (H) (K) (L) (M) (N)
11B254 254 37 14.375" 13" 9.25" 9.5" 6.5" 0.5" 13" 3.875" 10" 2" 4.125" 4.125"
11B215 215 37 14.375" 13" 9.25" 9.5" 6.5" 0.375" 13" 3.875" 8.5" 2.75" 3.5" 3.5"
11B184 184 37 14.375" 13" 9.25" 9.5" 6.5" 0.375" 13" 3.875" 7.5" 3.25" 2.75" 2.75"
11B213 213 37 14.375" 13" 9.25" 9.5" 6.5" 0.375" 13" 3.875" 8.5" 2.75" 2.75" 2.75"
22B284 284 37 14.375" 13" 9.25" 9.5" 6.5" 0.5" 13" 3.875" 11" 1.5" 4.75" 4.75"
22B256 256 37 14.375" 13" 9.25" 9.5" 6.5" 0.5" 13" 3.875" 10" 2" 5" 5"
22B215 215 37 14.375" 13" 9.25" 9.5" 6.5" 0.375" 13" 3.875" 8.5" 2.75" 3.5" 3.5"
22B254 254 37 14.375" 13" 9.25" 9.5" 6.5" 0.5" 13" 3.875" 10" 2" 4.125" 4.125"
33B324 324 48 16.375" 14" 11.5" 10.5" 7.75" 0.625" 15.75"
4.375" 12.5" 1.75" 5.25" 5.25"
33B326 326 48 16.375" 14" 11.5" 10.5" 7.75" 0.625" 15.75" 4.375" 12.5" 1.75" 6" 6"
33B286 286 48 16.375" 14" 11.5" 10.5" 7.75" 0.5" 15.75" 4.375" 11" 2.5" 5.5" 5.5"
33B256 256 48 16.375" 14" 11.5" 10.5" 7.75" 0.5" 15.75" 4.375" 10" 3" 5" 5"
33B284 284 48 16.375" 14" 11.5" 10.5" 7.75" 0.5" 15.75" 4.375" 11" 2.5" 4.75" 4.75"
45B364 364 56 18.375" 16" 12.25" 12.5" 8" 0.625" 16.5" 4.625" 14" 2" 5.125" 6.125"
45B365 365 56 18.375" 16" 12.25" 12.5" 8" 0.625" 16.5" 4.625" 14" 2" 6.125" 6.125"
45B324 324 56 18.375" 16" 12.25" 12.5" 8" 0.625" 16.5" 4.625" 12.5" 2.75" 5.75" 4.75"

Adjustable Electric Motor Mounting Rails

Adjustable rail style electric motor bases are more adaptable to surfaces that are uneven because the use of spacer plates can be used with each rail until the motor is level. They are also cost saving when compared with other motor base styles. Note that each size comes as a pair.

Standard Motor Rails - Style 1


This style is manufactured from high-strength structural steel and is fabricated to be a durable rail with push-pull adjustments. Individual foot-pads provide under-rail clearance and they are more adaptable to surfaces that are not completely even.

Frame Part # (AL) (AX) (E) (F MIN.) (AO) (AU) (AT) (AZ) (XC) (XD) (XE) (D-BOLT) (AY-BOLT) TRAVEL Weight (LBS)
440 A186 31.25" 3" 9" 442 11" 0.875" 0.3125" 10.125" 2.5" 4.75" 3.75" 3/4X3 3/4X14 7.5" 96
500 A187 35" 3.5" 10" 502 12.5" 1" 0.3125" 12" 3" 4.75" 4.5" 7/8X3.5 7/8X16 8" 115
580 A221 38.75" 4" 11.5" 583 14.5" 1" 0.375" 13" 2.9375" 4.75" 5" 7/8X3.5 7/8X16 8.5" 130
680 A222 42.5" 4.25" 13.5" 680 13.5" 1.125" 0.375" 10.75" 3.4375" 5" 4" 1X4 7/8X16 9." 146
NOTE: DC rails are also available but have to be manufactured to order (A186DC, A187DC, A221DC, A222DC)

Standard Motor Rails - Style 2


The syle 2 configuration features a "Z" bar construction that was designed by Overly Hautz, this design provides inherent rigidity at a moderate cost. Style 2 also incorporates a push-pull adjustment and is ideally suited for most flat surfaces.

Frame Part # (AL) (AX) (E) (F) (AO) (AU) (AT) (AZ) (XC) (XD) (XE) (D-BOLT) (AY-BOLT) TRAVEL Weight (LBS)
440 A271 31.25" 3" 9" 442 11" 0.875" 0.3125" 10.125" 2.5" 4.75" 3.75" 3/4X3 3/4X14 7.5" 95
500 A257 35" 3.5" 10" 502 12.5" 1.25" 0.3125" 12" 3" 5.75" 4.5" 7/8X3.5 7/8X16 8" 130
580 A258 38.75" 4" 11.5" 583 14.5" 1.25" 0.375" 13" 2.9375" 6.75" 5" 7/8X3.5 7/8X16 8.5" 185
680 A259 42.5" 4.25" 13.5" 680 13.5" 1.375" 0.375" 10.75" 3.4375" 5.75" 4" 1X4 7/8X16 9" 180
NOTE: DC rails are also available but have to be manufactured to order (A271DC, A257DC, A258DC, A259DC)

Heavy-Duty Electric Motor Mount Rails


These motor mounting rails are recommended for motors that range from 250 HP up to 500HP.

Part # (AL) (AX) (EE) (AO) (AZ) (XC) (XD) (XE) (D) (G) (J)
A10066836" 4" 7" - 30" 13" 12" 2.5" 7.062" 5" 3/4X10 16.5" 3"
A100225 40.5" 4" 8" - 34" 12" 12.5" 4" 7.56" 5.25" SEE MTG. 18.5" 3.75"
A100226 49.5" 4" 14" - 43" 17.875" 12.5" 4" 7.56" 5.25" BOLT CHART 15.8" 10.5"
Uses Notes:
A100668 is for 440 Series Motors
A100225 is for 500, 5000, 580, and 5800 Series Motors
XC Supplied as shown unless special length is required.
Mounting bolt Diameter selection is based on motor manufacture requirements.

Structural Steel Rails


These are manufactured from an extremely high-strength grade of steel and are recommended for electric motors greater than 500HP.

Part # (AL) (AX) (AO) (AZ) (XD) (AU-DIA.) (XE) (D) (AY) (2E)
40 40" 4.75" 24" 14.25" 7.562" 1.375" 12" SEE 1"-8 20"-23"
50 50" 4.75" 34" 14.25" 7.562" 1.375" 12" BOLT 1"-8 23"-27"
60 60" 4.75" 44" 14.25" 7.562" 1.375" 12" CHART 1"-8 27"-31"

Electric Motor Conversion Bases


Throughout time and relative improvements made to electric motors, the ability to pack a higher horse-power rating into a smaller frame size has become a standard. The issue with this though is that it leaves the need for replacing the older motor mounts with the correct size for the new motor. However, these motor conversion fixtures eliminate the need to replace motor mounts. They are easy to install and much more cost-effective than replacing an entire mount, especially on the larger sizes. They are specifically designed to position the axial centerlines and ends of the shaft extension identically with those of the original motor.
Original Frame to T Frame (NEMA Sizes 203-284):

Former NEMA New NEMA Part# Height (A) (B) (C) (D) (E) (F) (G) (H) (K) (L) (M) (N) (P)
404U 364T 404U-364T-40U36T 1" 2" 12.25" -- 11.25" -- 2" 1" 1.25" 4" 18.75" 8" 0.8125" 5/8-11
404U 365T 404U-364T-40U36T 1" 2" 12.25" -- -- 12.25" 2" 1" 1.25" 4" 18.75" 8" 0.8125" 5/8-11
405U 364T 405U-364T-40U36T 1" 2" -- 13.75" 11.25" -- 2" 1" 1.25" 4" 18.75" 8" 0.8125" 5/8-11
405U 365T 405U-365T-40U36T 1" 2" -- 13.75" -- 12.25" 2" 1" 1.25" 4" 18.75" 8" 0.8125" 5/8-11
404US 364TS 404US-364TS-40US36TS 1" 1.25" 12.25" -- 11.25" -- 2" 1" 1.25" 4" 18" 8" 0.8125" 5/8-11
404US 364TS 404US-365TS-40US36TS 1" 1.25" 12.25" -- -- 12.25" 2" 1" 1.25" 4" 18" 8" 0.8125" 5/8-11
405US 364TS 405US-364TS-40US36TS 1" 1.25" -- 13.75" 11.25" -- 2" 1" 1.25" 4" 18" 8" 0.8125" 5/8-11
405US 365TS 405US-365TS-40US36TS 1" 1.25" -- 13.75" -- 12.25" 2" 1" 1.25" 4" 18" 8" 0.8125" 5/8-11
444U 404T 444U-404T-44U40T 1" 2.25" 14.5" -- 12.25" -- 2.25" 1" 1.25" 4" 22" 9" 0.8125" 3/4-10
444U 405T 444U-405T-44U40T 1" 2.25" 14.5" -- -- 13.75" 2.25" 1" 1.25" 4" 22" 9" 0.8125" 3/4-10
445U 404T 445U-404T-44U40T 1" 2.25" -- 16.5" 12.25" -- 2.25" 1" 1.25" 4" 22" 9" 0.8125" 3/4-10
445U 405T 445U-405T-44U40T 1" 2.25" -- 16.5" -- 13.75" 2.25" 1" 1.25" 4" 22" 9" 0.8125" 3/4-10
444US 404TS 444US-404TS-44US40TS 1" 0.875" 14.5" -- 12.25" -- 2.125" 1" 1.25" 4" 20.5" 9" 0.8125" 3/4-10
444US 405TS 444US-405TS-44US40TS 1" 0.875" 14.5" -- -- 13.75" 2.125" 1" 1.25" 4" 20.5" 9" 0.8125" 3/4-10
445US 404TS 445US-404TS-44US40TS 1" 0.875" -- 16.5" 12.25" -- 2.125" 1" 1.25" 4" 20.5" 9" 0.8125" 3/4-10
445US 405TS 445US-405TS-44US40TS 1" 0.875" -- 16.5" -- 13.75" 2.125" 1" 1.25" 4" 20.5" 9" 0.8125" 3/4-10
444US 364TS 444US-364TS-44US36TS 2" 2.125" 14.5" -- 11.25" -- 2.125" 2" 1" 4.75" 21.75" 9" 0.8125" 5/8-11
444US 365TS 444US-365TS-44US36TS 2" 2.125" 14.5" -- -- 12.25" 2.125" 2" 1" 4.75" 21.75" 9" 0.8125" 5/8-11
445US 364TS 445US-364TS-44US36TS 2" 2.125" -- 16.5" 11.25" -- 2.125" 2" 1" 4.75" 21.75" 9" 0.8125" 5/8-11
445US 365TS 445US-365TS-44US36TS 2" 2.125" -- 16.5" -- 12.25" 2.125" 2" 1" 4.75" 21.75" 9" 0.8125" 5/8-11
444U 364T 444U-364T-44U36T 2" 4.375" 14.5" -- 11.25" -- 2.125" 2" 1" 4.75" 24" 9" 0.8125" 5/8-11
444U 365T 444U-365T-44U36T 2" 4.375" 14.5" -- -- 12.25" 2.125" 2" 1" 4.75" 24" 9" 0.8125" 5/8-11
445U 364T 445U-364T-44U36T 2" 4.375" -- 16.5" 11.25" -- 2.125" 2" 1" 4.75" 24" 9" 0.8125" 5/8-11
445U 365T 445U-365T-44U36T 2" 4.375" -- 16.5" -- 12.25" 2.125" 2" 1" 4.75" 24" 9" 0.8125" 5/8-11
444US 364T 444US-364T-44US36T 2" 0 14.5" -- 11.25" -- 2" 2" 1" 4.75" 19.5" 9" 0.8125" 5/8-11
444US 365T 444US-365T-44US36T 2" 0 14.5" -- -- 12.25" 2" 2" 1" 4.75" 19.5" 9" 0.8125" 5/8-11
445US 364T 445US-364T-44US36T 2" 0 -- 16.5" 11.25" -- 2" 2" 1" 4.75" 19.5" 9" 0.8125" 5/8-11
445US 365T 445US-365T-44US36T 2" 0 -- 16.5" -- 12.25" 2" 2" 1" 4.75" 19.5" 9" 0.8125" 5/8-11
Original Frame to T Frame (NEMA Sizes 324-445):

Former NEMA New NEMA Part# Height (A) (B) (C) (D) (E) (F) (G) (H) (K) (L) (M) (N) (P)
324 213T 324-213T-3221T -- -- 10.5" -- 5.5" -- -- -- -- -- -- -- -- --
324 215T 324-215T-3221T 2-3/4" 3-1/4" 10.5" -- -- 7" 1.25" 2" 1" 4" 17.5" 6.25" 0.6875" 3/8-16
326 213T 326-213T-3221T -- -- -- 12" 5.5" -- -- -- -- -- -- -- -- --
326 215T 326-215T-3221T -- -- -- 12" -- 7" -- -- -- -- -- -- -- --
324 254T 324-254T-3225T -- -- 10.5" -- 8.25" -- -- -- -- -- -- -- -- --
324 256T 324-256T-3225T 1.75" 1.875" 10.5" -- -- 10" 1.25" 1.25" 0.875" 3.75" 16" -- 0.6875" 1/2-13
326 254T 326-254T-3225T -- -- -- 12" 8.25" -- -- -- -- -- -- -- -- --
326 256T 326-256T-3225T -- -- -- 12" -- 10" -- -- -- -- -- -- -- --
364 284T 364-284T-3628T -- -- 11.25" -- 9.5" -- -- -- -- -- -- -- -- --
364 286T 364-286T-3628T 2" 2.125" 11.25" -- -- 11" 1.25" 1.5" 0.875" 4.25" 16.5" -- 0.6875" 1/2-13
365 284T 365-284T-3628T -- -- -- 12.25" 9.5" -- -- -- -- -- -- -- -- --
365 286T 365-286T-3628T -- -- -- 12.25" -- 11" -- -- -- -- -- -- -- --
404 284T 404-284T-4028T -- -- 12.25" -- 9.5" -- -- -- -- -- -- -- -- --
404 286T 404-286T-4028T 3" 3.625" 12.25" -- -- 11" 1.5" 2.5" 1" 5" 20" 8" 0.8125" 1/2-13
405 284T 405-284T-4028T -- -- -- 13.75" 9.5" -- -- -- -- -- -- -- -- --
405 286T 405-286T-4028T -- -- -- 13.75" -- 11" -- -- -- -- -- -- -- --
404 324T 404-324T-4032T -- -- 12.25" -- 10.5" -- -- -- -- -- -- -- -- --
404 326T 404-326T-4032T 2" 2.5" 12.25" -- -- 12" 2" 1.75" 1" 4.75" 19.5" 8" 0.8125" 5/8-11
405 324T 405-324T-4032T -- -- -- 13.75" 10.5" -- -- -- -- -- -- -- -- --
405 326T 405-326T-4032T -- -- -- 13.75" -- 12" -- -- -- -- -- -- -- --
444 324T 444-324T-4432T -- -- 14.5" -- 10.5" -- -- -- -- -- -- -- -- --
444 326T 444-326T-4432T 3" 4.125" 14.5" -- -- 12" 1.75" 2.75" 1" 5.75" 23.5" 9" 0.8125" 5/8-11
445 324T 445-324T-4432T -- -- -- 16.5" 10.5" -- -- -- -- -- -- -- -- --
445 326T 445-326T-4432T -- -- -- 16.5" -- 12" -- -- -- -- -- -- -- --
444 364T 444-364T-4436T -- 14.5" -- 11.25" -- -- -- -- -- -- -- -- --
444 365T 444-365T-4436T 2" 2.875" 41.5" -- -- 12.25" 1.25" 2" 1.125" 5" 21.75" 9" 0.8125" 5/8-11
445 364T 445-364T-4436T -- -- -- 16.5" 11.25" -- -- -- -- -- -- -- -- --
445 365T 445-365T-4436T -- -- -- 16.5" -- 12.25" -- -- -- -- -- -- -- --
Original Frame to U Frame (NEMA Sizes 66-365S):

Former NEMA New NEMA Part# Height (A) (B) (C) (D) (E) (F) (G) (H) (K) (L) (M) (N) (P)
66 56 66-56-66-56 0.625" 0.75" 5" -- 3" -- 0.75" 0.5" 0.5"
2" 7" 2.9375" 0.34375" 5/16-18
203 182 203-182-2018 0.5" 0.375 5.5" -- 4.5" -- 0.8125" 0.25" 0.75" -- 9.5" 4" 0.375" 0.375"
204 184 204-184-2018 -- -- 6.5" -- 5.5" -- -- -- -- -- -- -- -- --
224 182 224-182-2218 1" 0.5" 6.75" -- 4.5" -- -- -- -- -- -- -- -- --
224 184 224-184-2218 -- -- 6.75" -- -- 5.5" 0.75" 0.75" 0.5" 2.375" 10.25" 4.5" 0.40625" 3/8-16
225 182 225-182-2218 -- -- -- 7.5" 4.5" -- -- -- -- -- -- -- -- --
225 184 225-184-2218 -- -- -- 7.5" -- 5.5" -- -- -- -- -- -- -- --
224 213 224-213-2221A 0.25" 0 6.75" -- 5.5" -- -- -- -- -- -- -- -- --
225 213 225-213-2221A -- -- -- 7.5" 5.5" -- 1" 0 1" 2" 9.5" 4.5" 0.40625" 3/8-16
224 213 224-213-2221B 0.25" 0 6.75" -- 5.5" -- -- -- -- -- -- -- -- --
225 213 225-213-2221B -- -- 7.5" -- 5.5" -- 1.25" 0.25" 1" 11 11" 4.5" 0.375" 3/8-16
254 213 254-213-25U21T 1" 1.125" 8.25"
-- 5.5" -- -- -- -- -- -- -- -- --
254 215 254-215-25U21T -- -- 8.25" -- -- 7" 1" 0.75" 0.75" 2.5" 13" 5" 0.5625" 3/8-16
284 254U 284-254U-284254U 0.75" 0.5" 9.5" -- 8.25" -- 1" 0.5" 1.125" 3" 12" 5.5" 0.5625" 1/2-13
324 254U 324-254U-3225U 1.75" 2.125" 10.5" -- 8.25" -- -- -- -- -- -- -- -- --
324 256U 324-2556U-3225U -- -- 10.5" -- -- 10" -- -- -- -- -- -- -- --
326 254U 326-254U-3225U -- -- -- 12" 8.25" -- 1" 1.25" 0.875" 3.5" 16" 6.25" 0.6875"
1/2-13
326 256U 326-254U-3225U -- -- -- 12" -- 10" -- -- -- -- -- -- -- --
364 284U 364-284U-3628U 2" 1.875" 11.25" -- 9.5" -- -- -- -- -- -- -- -- --
364 286U 364-286U-3628U -- -- 11.25" -- -- 11" -- -- -- -- -- -- -- --
365 284U 365-284U-3628U -- -- -- 12.25" 9.5" -- 1" 1.5" 0.8125" 3.75" 16" 7" 0.6875" 1/2-13
365 286U 365-286U-3628U -- -- -- 12.25" -- 11" -- -- -- -- -- -- -- --
364 324U 364-324U-36US324TS -- 0.625" 11.25" -- 10.5" -- 1.875" 0.75" 0.75" 3.5" 15.75" 7" 0.6875" 5/8-11
364S 324S 364S-324S-36US324TS -- 0.625" 11.25" -- 10.5" -- 1.875" 0.75" 0.75" 3.5" 15.75" 7" 0.6875" 5/8-11
365 324U 365-324U-36US324TS -- 0.625" -- 12.25" 10.5" -- 1.875" 0.75" 0.75" 3.5" 15.75" 7" 0.6875" 5/8-11
365S 324S 365S-324S-36US324TS -- -- -- -- -- -- -- -- -- -- -- -- -- --
365 326U 365-326U-365US326TS -- 0.625" -- 12.25" -- 12" 1.875" 0.75" 0.75" 3.5" 15.75" 7" 0.6875" 5/8-11
365S 326S 365S-326S-365US326TS -- -- -- -- -- -- -- -- -- -- -- -- -- --
U Frame to T Frame (NEMA Sizes 182-365U):

Former NEMA New NEMA Part# Height (A) (B) (C) (D) (E) (F) (G) (H) (K) (L) (M) (N) (P)
182 143T 182-143T-1814T -- -- 4.5" -- 4" -- -- -- -- -- -- -- -- --
182 145T 182-145T-1814T -- -- 4.5" -- -- 5" -- -- -- -- -- -- -- --
184 143T 184-143T-1814T 1" 0.5" -- 5.5" 4" -- 0.75" 1" 0.5" 2.25" 7.5" 3.75" 0.4375" 5/16-18
184 145T 184-145T-1814T -- -- -- 5.5" -- 5" -- -- -- -- -- -- -- --
213 182T 213-182T-2118T -- -- 5.5" -- 4.5" -- -- -- -- -- -- -- -- --
213 184T 213-184T-2118T -- -- 5.5" -- -- 5.5" -- -- -- -- -- -- -- --
215 182T 215-182T-2118T 0.75" 1" -- 7" 4.5" -- 1" 0.5" 0.625" 1.875" 9.5" 4.25" 0.4375" 3/8-16
215 184T 215-184T-2118T -- -- -- 7" -- 5.5" -- -- -- -- -- -- -- --
254U 213T 254U-213T-25U21T -- -- 8.25" -- 5.5" -- -- -- -- -- -- -- -- --
254U 215T 254U-215T-25U21T -- -- 8.25" -- -- 7" -- -- -- -- -- -- -- --
256U 213T 256U-213T-25U21T 1" 1.125" -- 10" 5.5" -- 1" 0.75" 0.75" 2.5" 13" 5" 0.5625" 3/8-16
256U 215T 256U-215T-25U21T -- -- -- 10" -- 7" -- -- -- -- -- -- -- --
284U 254T 284U-254T-28U25T -- -- 9.5" -- 8.25" -- -- -- -- -- -- -- -- --
284U 256T 284U-256T-28U25T -- -- 9.5" -- -- 10" -- -- -- -- -- -- -- --
286U 254T 286U-254T-28U25T 0.75" 1.375" -- 11" 8.25" -- 1.25" 1.5" 0.75" 2.5" 14.5" 5.5" 0.5625" 1/2-13
286U 256T 286U-256T-28U25T -- -- -- 11" -- 10" -- -- -- -- -- -- -- --
324S 264TS 324S-284TS-324S284TS 1" 0.5" 10.5" -- 9.5" -- 1.5" 0.75" 0.75" 3" 13.5" 6.25" 0.6875" 1/2-13
326S 284TS 326S-284TS-32S28TS -- -- -- 12" 9.5" -- -- -- -- -- -- -- -- --
326S 286TS 326S-286TS-32S28TS 1" 0.5" -- 12" -- 11" 1.5" 0.75" 0.75" 3" 15" 6.25" 0.6875" 1/2-13
324U 284T 324U-284T-32U28T -- -- 10.5" -- 9.5" -- -- -- -- -- -- -- -- --
324U 286T 324U-286T-32U28T -- -- 10.5" -- -- 11" -- -- -- -- -- -- -- --
326U 284T 326U-284T-32U28T 1" 1.5" -- 12" 9.5" -- 1.5" 0.75" 0.75" 3" 16" 6.25" 0.6875" 1/2-13
326U 286T 326U-286T-32U28T -- -- -- 12" -- 11" -- -- -- -- -- -- -- --
364US 324TS 364US-324TS-36US324TS -- -- 11.25" -- 10.5" -- -- -- -- -- -- -- -- --
365US 324TS 365US-324TS-36US324TS 1" 0.625" -- 12.25" 10.5" -- 1.875" 0.75" 0.75" 3.5" 15.75" 7" 0.6875" 5/8-11
365US 326TS 365US-326TS-365US326TS 1" 0.625" -- 12.25" -- 12" 1.875" 0.75" 0.75" 3.5" 15.75-- 7" 0.6875" 5/8-11
364U 324T 364U-324T-36U32T -- -- 11.25" -- 10.5" -- -- -- -- -- -- -- -- --
364U 326T 364U-326T-36U32T -- -- 11.25" -- -- 12" -- -- -- -- -- -- -- --
365U 324T 365U-324T-36U32T 1" 1.75" -- 12.25" 10.5" -- 1.75" 0.75" 0.75" 3.5" 16.75" 7" 0.6875" 5/8-11
365U 326T 365U-326T-36U32T -- -- -- 12.25" -- 12" -- -- -- -- -- -- -- --
U Frame to T Frame (404U-445US):

Former NEMA New NEMA Part# Height (A) (B) (C) (D) (E) (F) (G) (H) (K) (L) (M) (N) (P)
203 143T 203-143T-2014T -- -- 5.5" -- 4" -- -- -- -- -- -- -- -- --
203 145T 203-145T-2014T 1.5" 0.875" 5.5" -- -- 5" -- -- -- -- -- -- -- --
204 143T 204-143T-2014T -- -- -- 6.5" 4" -- -- -- -- -- -- -- -- --
204 145T 204-145T-2014T -- -- -- 6.5" -- 5" 0.75" 1.25" 0.5" 2.5" 9" 4" 0.4375" 5/16-18
213 143T 213-143T-2114T -- -- 5.5" -- 4" -- -- -- -- -- -- -- -- --
213 145T 213-145T-2114T 1.75" 2" 5.5" -- -- 5" -- -- -- -- -- -- -- --
215 143T 215-143T-2114T -- -- -- 7" 4" -- -- -- -- -- -- -- -- --
215 145T 215-145T-2114T -- -- -- 7" -- 5" 1" 1.5" 0.625" 2.875" 10.5" -- 0.4375" 3/8-16
224 143T 224-143T-2214T -- -- 6.75" -- 4" -- -- -- -- -- -- -- -- --
224 145T 224-145T-2214T 2" 2" 6.75" -- -- 5" -- -- -- -- -- -- -- --
225 143T 225-143T-2214T -- -- -- 7.5" 4" --





225 145T 225-145T-2214T -- -- -- 7.5" -- 5" 0.75" 1.75" 0.5" 5" 11" 4.5" 0.4375" 5/16-18
224 182T 224-182T-2218T -- -- 6.75" -- 4.5" -- -- -- -- -- -- -- -- --
224 184T 224-184T-2218T 1" 1" 6.75" -- -- 5.5" -- 0.75" 0.75" 2.5" 10.25" -- 0.4375" 3/8-16
225 182T 225-182T-2218T -- -- -- 7.5" 4.5" -- 1" -- -- -- -- -- -- --
225 184T 225-184T-2218T -- -- -- 7.5" -- 5.5" -- -- -- -- -- -- -- --
254 182T 254-182T-2218T -- -- 8.25" -- 4.5" 5.5" -- -- -- -- -- -- -- --
254 184T 254-184T-2518T 1.75" 2.125" 8.25" -- 4.5" 5.5" 1" 1.25" 0.75" 3" 12.25" 5" 0.5625" 3/8-16
254 213T 254-213T-2521T -- -- 8.25" -- 5.5" -- 1" 0.75" 0.75" 2.5" 11" -- 0.5625" 3/8-16
254 215T 254-215T-2521T 1" 0.75" 8.25" -- -- 7" -- -- -- -- -- -- -- --
284 213T 284-213T-2821T -- -- 9.5" -- 5.5" -- -- -- -- -- -- -- -- --
284 215T 284-215T-2821T 1.75" 1.625" 9.5" -- -- 7" 1.25" 1.25" 1" 3.25" 13.375" -- 0.5625" 3/8-16

Pivoting Electric Motor Base

A pivoting motor base features manual adjustment for belt tensioning, is available in both standard and heavy-duty configurations, and is available for NEMA frame sizes 56-449T or larger upon request.
NEMA Frame Sizes 56-215T:

NEMA Frame Part# (AL) (AM) (AX) (E) (F) (AO) (AR) (AU) (AT) (D-Bolt)
56 A101725 12.5" 7.5" 4.75" 4.875" 3" 6" 2.5" 0.375" 0.25" 1/2-13
182T A101614 17.5" 8.5" 4.75" 7.5" 4.5" 9.5" 3.5" 0.5" 0.25" 1/2-13
184T A101722 17.5" 9.5" 4.75" 7.5" 5.5" 9.5" 4.5" 0.5" 0.25" 1/2-13
213T A101544 18.5" 11" 4.75" 8.5" 5.5" 10.5" 4.5" 0.5" 0.25" 1/2-13
215T A101927 18.5" 11" 4.75" 8.5" 7" 10.5" 5.5" 0.5" 0.25" 1/2-13
NEMA Frame Sizes 254-449T:

NEMA Frame Part# (AL) (AM) (AX) (E) (F) (AO) (AR) (AU) (AT) (D-Bolt)
254T A101616 21.5" 15" 5.5" 10" 8.25" 8.5" 7.5" 0.562" 0.375" 5/8-11
256T A101780 21.5" 17" 5.5" 10" 10" 10" 8.5" 0.562" 0.375" 5/8-11
284T A101901 23" 16" 5.5" 11" 9.5" 10" 8" 0.562" 0.375" 5/8-11
286T A101363 23" 18" 5.5" 11" 11" 10" 9" 0.562" 0.375" 5/8-11
324T A101838 25" 17.5" 5.5" 12.5" 10.5" 12.5" 8.5" 0.687" 0.375" 3/4-10
326T A101770 25" 19" 5.5" 12.5" 12" 12.5" 10" 0.687" 0.375" 3/4-10
364T A101848 28" 17.5" 6" 14" 11.25" 18" 9.5" 0.687" 0.375" 3/4-10
365T A101819 28" 18.5" 6" 14" 12.25" 18.5" 10" 0.687" 0.375" 3/4-10
444T A101804 37" 21.5" 7" 18" 14.5" 23" 13" 0.812" 0.5" 1" ACME - 5" ACME
447T A101863 37" 26" 8" 18" 20" 23" 17" 0.812" 0.5" 1" ACME - 5" ACME
449T A101358 37" 31" 8" 18" 25" 23" 22" 0.812" 0.5" 1" ACME - 5" ACME




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