Motor specs that decide the fit
The SH31003P1AF3000 is a three-phase servo motor from the SH3 series, sized for 2400 W continuous power with natural convection cooling — no external fan needed, which simplifies cable routing and reduces airborne noise in clean-room or lab environments. It ships with a holding brake rated at 9 N·m (79.7 lbf·in) pull-in power of 18 W — the brake holds the load at standstill without servo current, critical for vertical-axis applications where a power loss would drop the load. The encoder is an absolute single-turn Hiperface DSL — no homing sequence needed on power-up, and the single-cable DSL protocol reduces wiring to one hybrid cable for power and feedback, saving a cable tray slot and a connector on the drive end. Nominal speed depends on the supply: 2000 rpm at 230 V single-phase, 4000 rpm at 400 V three-phase, and 4800 rpm at 480 V three-phase — the motor delivers 7 N·m nominal torque at 230 V, dropping to 5.7 N·m at 400 V and 5.1 N·m at 480 V as the speed rises.
Mounting and mechanical interface
Flange size is 100 mm (3.9 in) with an international standard flange pattern — centring collar diameter 95 mm, depth 3.5 mm, mounting holes on a 9 mm diameter bolt circle. The shaft is 19 mm diameter with a parallel key (6 mm key width) and 40 mm shaft length. Overall length is 271.5 mm (10.7 in) — measure the available envelope before committing; the straight quicklock connector adds protrusion beyond the motor body. IP65 on the motor body per IEC 60034-5, but the shaft bushing without a shaft seal ring drops to IP54 — if the application sees directed washdown at the shaft exit, fit an optional shaft seal to maintain the IP65 rating.
Electrical parameters for drive tuning
Stator resistance is 1.43 Ω and stator inductance is 9.4 mH — these set the current-loop bandwidth and the voltage drop at high speed. The torque constant is 1.22 N·m/A at 120 °C copper temperature; the back EMF constant is 77 V/krpm at 20 °C. Maximum radial force at the shaft is 4200 N at 1000 rpm, dropping to 2910 N at 3000 rpm — belt-drive applications must stay within this envelope to avoid bearing overload. Maximum axial force is 740 N.
The sizing reference is SH31003P — this is the base motor frame; the full order code includes the brake (P1AF3000 suffix). No pin-compatible alternative is listed; if a replacement is needed, the SH3 series shares the same flange and shaft dimensions across power ratings, so a higher-torque sibling may fit the same mechanical envelope.