Flange size, encoder type, and brake omission
The SH31003P12A1200 is a 100 mm flange servo motor (IEC standard) with an absolute multiturn SinCos Hiperface encoder — the feedback type that retains position through a power cycle, eliminating the need for a homing routine on restart. It ships without a holding brake, so any vertical-axis load requires an external brake or a counterbalance. The motor itself is natural-convection cooled — no fan, no forced-air requirement, which simplifies ducting in clean-room or dust-sensitive zones.
Torque and speed across supply voltages
Nominal torque varies by supply: 7.5 N.m at 115 V single-phase, 7.0 N.m at 230 V single-phase, 5.7 N.m at 400 V three-phase, and 5.1 N.m at 480 V three-phase. The continuous stall torque is a flat 8 N.m across the 115–480 V three-phase range, so the motor holds its low-speed torque regardless of line voltage. Peak stall torque reaches 28.3 N.m for short-duration acceleration or high-inertia starts — the drive must be sized to deliver the 28.3 A Irms maximum current to access this peak. Nominal speed scales with voltage: 1000 rpm at 115 V single-phase, 2000 rpm at 230 V single-phase, 4000 rpm at 400 V three-phase, and 4800 rpm at 480 V three-phase. Continuous output power is 2400 W, with nominal output power ranging from 790 W (115 V single-phase) to 2560 W (480 V three-phase). The 4-pole design means 4000 rpm at 133 Hz — a standard servo speed range that pairs with common gearbox ratios.
Environmental sealing and mechanical limits
IP65 on the motor body and shaft bushing, IP67 on the housing — this motor withstands washdown and hose-directed water, suitable for food-and-bev or outdoor conveyor lines. The straight electrical connector mates with a standard cable gland; no right-angle adapter needed for tight side-clearance. Maximum radial force Fr derates with speed: 1050 N at 1000 rpm, dropping to 660 N at 4000 rpm. Maximum axial force Fa is 160 N — direct-drive applications with thrust loads (leadscrews, linear actuators) must stay within this limit or use a thrust bearing. The parallel key shaft end with 19 mm diameter and 40 mm length accepts standard couplings and pulleys.
Electrical parameters for drive tuning
Stator resistance is 1.43 Ω and stator inductance is 4.7 mH — these values set the current-loop PI gains in the drive. The torque constant is 1.22 N.m/A at 120°C copper temperature, and the back-EMF constant is 77 V/krpm at 20°C. At high speeds, the back-EMF approaches the DC-bus voltage; check that the drive's voltage margin accommodates the 4800 rpm condition.