What supply voltage and speed do you need from this motor?
The SH31401M01F1200 is a three-phase servo motor from the SH3 family, and its speed-torque curve depends on what voltage you feed it. On 400 V three-phase, it delivers 1500 rpm nominal; on 480 V three-phase, 1800 rpm. Single-phase 115 V drops it to 375 rpm, and 230 V single-phase gives 750 rpm — so if you're wiring into a single-phase shop, you're trading speed for the same frame size. Continuous power is 1700 W, but the nominal output power shifts with the supply: 430 W on 115 V single-phase, 860 W on 230 V single-phase, 1670 W on 400 V three-phase, and 1960 W on 480 V three-phase. That means the motor is really built for three-phase duty — single-phase connections leave a lot of the copper on the table. Peak stall torque hits 27 Nm across the 115–480 V three-phase range, and continuous stall torque is 11.1 Nm. The holding brake is rated at 23 Nm — that's the number that matters for vertical-axis safety: if the drive loses power, the brake holds the load, not the motor magnets.
Encoder feedback and mounting fit
The encoder is an absolute single-turn SinCos Hiperface — that's a digital position feedback with analog sine/cosine tracks for interpolation. Single-turn means it knows its position within one revolution after power-up, but not the number of turns. Hiperface is a common protocol for drives from多家 manufacturers; the drive parameter set needs to match the encoder resolution and commutation offset. The motor flange is 140 mm (5.5 in) with a centring collar diameter of 130 mm and depth of 3.5 mm. Shaft is 24 mm diameter, 50 mm long, smooth (no keyway) — so the coupling or pulley clamps on with a friction lock. Key width is 8 mm if you add a key later, but as shipped it's a smooth shaft. The IP rating is IP65 on the motor body and shaft bushing, IP67 on the housing — meaning it handles washdown spray but not submersion.
The sizing reference is SH31401M, which is the motor family this unit belongs to. The SH3 series covers a range of flange sizes and power ratings; this particular variant includes the holding brake and the Hiperface encoder. No direct pin-compatible alternative is listed — if you need a replacement, the BOM position should match this exact order code.