For c flange motors refer to.
Electric motor base dimensions.
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.
Bases are design to provide adequate travel are fully adjustable by the use of a single adjusting screw and have elongated mounting holes in the base plate.
All dimensions are approxi mate not to be used for construction purposes.
Drawing shows rigid base.
Motor bases are fabricated of steel which offers a base of rugged design compact and smooth in appearance.
Dimensions drip proof totally enclosed fan cooled and explosion proof.
The following are dimensional size charts for standard electric motor nema standard frames and configuration.
Increase energy efficiency in belt driven systems while reducing wear on components use one of these bases to adjust your motor position to get the proper belt tension.
Heavy duty motor base style c2hd nema frame sizes 254 449 double adjusting heavy duty bases or standard rails are recommended for motors between 150 hp 1800 rpm and 250 hp 1800 rpm on non severe applications.
Electrical induction motors synchronous speed the speed at which an induction motor operates depends on the input power.
See motor mount selection chart type 2 b standard base.
Foot mounting dimensions listed are identical for either rigid or resilient base mounting.
Bases for variable speed applications allow movement while operating to compensate for vibration and varying loads.
Electric motor efficiency calculate electric motor efficiency.
Electric motor calculator calculate amps hp and kva.
Electrical electrical units amps and electrical wiring wire gauge and awg electrical formulas and motors.
Bases for constant speed applications keep your motor in a fixed position while operating.
For 56h combination foot refer to diagram 1.
The following specifications documents and dimension charts are available as acrobat pdf files.
Nema shaft u k ey r dim n s 3 8 1 2 5 8 7 8 1 1 8 1 3 8 1 5 8 1 7 8 2 1 8 2 3 8 2 1 2 2 7 8 3 3 8 3 7 8 21 64 29 64 33.