C designates a c flange face mounted motor e g nema 56c frame.
56c frame bolt pattern.
The critical items on c face motors are the bolt circle aj dimension rabbet diameter ak dimension and the shaft size u dimension.
Nema quick reference chart nema frame de2f h nop uvaa ab ah aj ak ba bb bd xo tap 42 2 5 8 1 3 4 1 11 16 9 32 1 1 2 54 11 163 8 1 1 8 3 84 1 32 1 5 16 3 3 4 3 2 1 16 1 84 5 8 1 9 16 1 4 20.
U shaft diameter.
For example in the two digit 56 frame the d dimension is 3 56 divided by 16 3.
2f bolt pattern centers.
This is the most popular type of face mounted motor and has a specific bolt pattern on the shaft end to allow mounting.
Standard 56c defines the bolt hole spacing of mounting face plates for electrical devices and these measurements are closely adhered to by all nema members.
E bolt pattern centers.
In any standard frame number designation there are either two or three numbers.
Motor dimensional chart nema c and j face mounting dimensions mounting dimensions of 1the 156j face are exactly the same as the nema 456c.
See illustrations and table below for speci cs.
1 2 deep 13 32 dia.
4 holes equally spaced as shown 45 6 1 2 10 r.
D shaft center height.
Ak flange lip diameter.
Removable bolt on bolt off base frame 1 3 1800 56c 56c 28 1.
9 16 ag bx 6 5 64 1 4 2ounc 2b l h.
Standardized motor dimensions are established by the national electrical manufacturers association nema are tabulated below and apply to all base mounted motors listed herein that carry a nema frame designation.
Electric motor nema frame sizes table.
V shaft length.
C total length.
The frame number relates to the d dimension distance from center of shaft to center bottom of mount.
Frame 42 48 56 56h 143t 145t 182 184 182t 184t 213 215 213t 215t 254u 256u 254t 256t 284u 286u 284t 286t 284ts 286ts 324u 326u 324t 326t 324ts 326ts 364u 365u 364t 365t 364ts 365ts 404u 405u 404t 405t 404ts 405ts 444u 445u 444t 445t 447t 449t 444ts 445ts 447ts 449ts d e 2f h n o p u v aa ab ah aj ak ba bb bd tap 2 5 8 3 3 1 2 3 1 2 4 1 2 5.
56c 56hc 56j 143tc and.
Typical examples of frame numbers 48 56 145 and 215.
Tenon pads box faces square with shaft l within 004 t i r.
Electric motor nema frame table chart sizes engineers edge.
56j face 5has 3a threaded shaft of stainless steel while all others have a keyed steel shaft.
Aj flange bolt centers.
