Electric Motor Base Dimensions

The following are dimensional size charts for standard electric motor nema standard frames and configuration.

Electric motor base dimensions.

Motor bases are fabricated of steel which offers a base of rugged design compact and smooth in appearance. 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. All dimensions are approxi mate not to be used for construction purposes. 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.

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 efficiency calculate electric motor efficiency. For 56h combination foot refer to diagram 1. Bases for variable speed applications allow movement while operating to compensate for vibration and varying loads.

Electrical induction motors synchronous speed the speed at which an induction motor operates depends on the input power. For c flange motors refer to. Drawing shows rigid base. 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.

Electrical electrical units amps and electrical wiring wire gauge and awg electrical formulas and motors. 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. The following specifications documents and dimension charts are available as acrobat pdf files. Dimensions drip proof totally enclosed fan cooled and explosion proof.

Nema motor dimensions reference chart a ft e r l e t t e r i n d i c a t e s t h e n u m b e r i s a n app r o x i m a te v a l ue. Foot mounting dimensions listed are identical for either rigid or resilient base mounting. See motor mount selection chart type 2 b standard base. We would like to show you a description here but the site won t allow us.