Over time and with relative improvements to motors, the ability to fit higher horsepower ratings into smaller frame sizes has become standard. The problem with this, however, is that it does not require replacing the old motor mount 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 more cost effective than replacing the entire mount, especially on larger sizes. Electric motor conversation base are specifically designed to position the axial centerline and end of the shaft extension the same as the axial centerline and end of the original motor.

Electric Motor Conversion Bases

To meet your changing application needs, we are equipped with electric conversion motor bases that allow for easy installation of new T-frame motors where an existing U-frame motor was previously applied.

Original Frame to T Frame (NEMA Sizes 203-284)

Electric Motor Conversion Bases

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)

Electric Motor Conversion Bases

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)

Electric Motor Conversion Bases

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)

Electric Motor Conversion Bases

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)

Electric Motor Conversion Bases

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

HZPT is one of the leading China electric motor base manufactures with more than 15 years. Contact us now to get more about our electric motor conversion bases for sale!

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