C Motor Dimensions

The NEMA Electric Motor dimensional information will help us identify which electric motor end you will require for your mounting bracket. This information is NEMA standard for bolt circle, pilot and shafts for C face motors, ranging in size from 56C to 405TSC. Hydra-Mount E series mounting brackets require the C face machining for mounting purposes.

 

NEMA Electric Motor Shaft and "C" Face

NEMA Bolt
Circle
AJ
Register
AK
Shaft
Diameter
U
Shaft
Length
AH
Key
Sq.
KF
Key
Length
BF
(Tapped Holes)
Motor Frame Size No. Req'd
  56C
143TC
145TC
182TC
184TC
5-7/8
5-7/8
5-7/8
7-1/4
7-1/4
4-1/2
4-1/2
4-1/2
8-1/2
8-1/2
5/8
7/8
7/8
1-1/8
1-1/8
2-1/16
2-1/8
2-1/8
2-5/8
2-5/8
3/16
3/16
3/16
1/4
1/4
1
1-3/8
1-3/8
1-3/4
1-3/4
3/8-16
3/8-16
3/8-16
1/2-13
1/2-13
4
4
4
4
4
  213TC
215TC
254TC
256TC
284TC
7-1/4
7-1/4
7-1/4
7-1/4
9
8-1/2
8-1/2
8-1/2
8-1/2
10-1/2
1-3/8
1-3/8
1-5/8
1-5/8
1-5/8
3-1/8
3-1/8
3-3/4
3-3/4
4-3/8
5/16
5/16
3/8
3/8
1/1
2-3/8
2-3/8
2-7/8
2-7/8
3-1/4
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
4
4
4
4
4
284TSC

286TSC

324TSC


286TC

324TC

9
9
9
11
11
10-1/2
10-1/2
10-1/2
12-1/2
12-1/2
1-5/6
1-7/8
1-5/8
2-1/8
1-7/8
3
4-3/8
3
5
3-1/2
3/8
1/2
3/8
1/2
1/2
1-7/8
3-1/4
1-7/8
3-7/8
2
1/2-13
1/2-13
1/2-13
5/8-11
5/8-11
4
4
4
4
4

326TSC

364TSC

326TC

364TC

365TC

11
11
11
11
11
12-1/2
12-1/2
12-1/2
12-1/2
12-1/2
2-1/8
1-7/8
2-3/8
1-7/8
2-3/8
5
3-1/2
5-5/8
3-1/2
5-5/8
1/2
1/2
5/8
1/2
5/8
3-7/8
2
4-1/4
2
4-1/4
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
4
4
4
4
4
365TSC

404TSC

405TSC


404TC

405TC

11
11
11
11
11
12-1/2
12-1/2
12-1/2
12-1/2
12-1/2
1-7/8
2-7/8
2-1/8
2-7/8
2-1/8
3-1/2
7
4
7
4
1/2
3/4
1/2
3/4
1/2
2
5-5/8
2-3/4
5-5/8
2-3/4
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
4
4
4
4
4