What this servo motor delivers on the torque-speed curve
The SH31401M12A1000 is a three-phase servo motor from the SH3 series, delivering 1700 W continuous power with a continuous stall torque of 11.1 Nm across the 115–480 V three-phase range. Nominal torque sits at 10.6 Nm at 400 V three-phase, dropping slightly to 10.4 Nm at 480 V three-phase due to flux weakening at higher bus voltage. Peak stall torque reaches 27 Nm, giving you a 2.4× overload margin for acceleration transients — enough to handle short-duration load spikes without tripping the drive.
Encoder feedback and position retention
The absolute multiturn SinCos Hiperface encoder retains position through power cycles — no homing routine on restart, which matters for pick-and-place or gantry applications where lost steps cost cycle time. Maximum mechanical speed is 4000 rpm, but the encoder's electrical bandwidth supports the full speed range without pulse dropout.
Mounting and environmental fit
The motor mounts on an international standard flange with a 140 mm flange size and a 130 mm centring collar — common for this power class, so it swaps into existing machine frames without adapter plates. IP54 as standard with the shaft bushing without seal ring; upgrade to IP65 by fitting the shaft seal ring — both conform to IEC 60034-5. The IP65 variant handles washdown environments; IP54 suits dry cabinet installations. Natural convection cooling means no fan — no debris ingestion, no fan noise, and one less failure point in dusty or food-grade lines. Electrical connection via a rotatable right-angled or straight connector — choose the orientation that keeps the cable bundle clear of moving parts on the machine frame.
Mechanical interface and bearing load limits
Shaft diameter is 24 mm with a parallel key and 50 mm shaft length — standard for coupling to timing pulleys or direct-drive loads via a bell housing. Maximum radial force Fr is 1930 N at 1000 rpm, dropping to 1340 N at 3000 rpm — derate the overhung load as speed increases to protect the bearing race. Maximum axial force Fa is 300 N — sufficient for helical-gear thrust but not for axial plunger loads; use a thrust bearing if the application exceeds this.
The sizing reference SH31401M guides drive selection — pair it with a compatible Schneider servo drive rated for the continuous stall current of 4 A and peak current of 10.8 A.