Motor specs that decide the fit
The SH31401M11F1000: This SH3 servo motor delivers 1.7 kW continuous power with natural convection cooling — no external fan needed, so the motor profile stays clean for tight-axis mounting on a gantry or rotary table. The holding brake holds 23 N.m (203.6 lbf.in) — enough to lock a vertical load on a Z-axis when the drive is disabled, without a separate mechanical brake resistor. Rated speed shifts with supply voltage: 1500 rpm at 400 V three-phase, 1800 rpm at 480 V three-phase, and derated to 750 rpm at 230 V single-phase or 375 rpm at 115 V single-phase. Nominal torque stays near 10.6 N.m across the three-phase range. Encoder is an absolute single-turn SinCos Hiperface — no homing sequence on power-up, the controller reads position immediately. Saves a full minute per startup on multi-axis lines.
IP rating and mechanical interface
IP65 rating on the motor body with the shaft bushing and seal ring installed per IEC 60034-5 — handles washdown spray in food or packaging lines, but the shaft bushing without the seal ring drops to IP54, so check the seal kit at install. International standard flange, 140 mm (5.5 in) square, centring collar 130 mm diameter, four M11 mounting holes on a 165 mm bolt circle — bolts directly to a standard IEC frame mount without an adapter plate. Shaft is 24 mm diameter with a parallel key, 50 mm shaft length, 8 mm key width — mates with standard metric couplings and pulleys; no special shaft machining needed.
Electrical parameters for drive tuning
Stator resistance 5.3 Ohm, inductance 88.55 mH — these set the electrical time constant for the current loop. The drive's auto-tuning routine needs these values; manual entry works if the drive doesn't support auto-tune on Hiperface. Torque constant 2.78 N.m/A at 120 °C copper temperature — use this to calculate the RMS current for a given load torque profile. Continuous stall current is 4 A; peak current limit is 10.8 A RMS. Back EMF constant is 193 V/krpm at 20 °C — at 1800 rpm the motor generates about 347 V line-to-line. The drive's DC bus must be high enough to overcome this voltage plus the IR drop at full load.
Sourced through independent distribution channels. Not a stock-holding item — lead time varies with batch size. The SH31401M sizing reference is specific to this flange size, power level, and encoder type — a substitution requires re-evaluating the motor's mechanical and electrical fit.