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Product Introduction:
The SR3624-8291-50 is a variant of the S700 series servo motor with a custom winding (8291) and specific connector/shaft configuration (50). The “SR” prefix denotes a special-configuration variant within the S700 family. The 8291 winding is optimized for low-speed high-torque applications with extended constant-torque range.
Technical Specifications:
| Parameter | Value |
|---|---|
| Frame Size / Flange | 80 mm (3.15 in) — S36 designation |
| Motor Length Code | 2 (short stack) |
| Winding Code | 8291 — Low-speed high-torque optimized winding |
| Connector / Shaft Code | 50 — Specific terminal and shaft configuration |
| Continuous Torque | 2.4 Nm (21.2 lb-in) |
| Peak Torque | 7.2 Nm (63.7 lb-in) |
| Max Speed (Continuous) | 2,500 RPM |
| Peak Speed | 4,500 RPM |
| Rated Power (Continuous) | 0.63 kW (0.84 HP) |
| Peak Power | 1.88 kW (2.52 HP) |
| Voltage Rating | 200–480 VAC (3-Phase) |
| Encoder | Single-turn optical — 2,500 lines (10,000 counts/rev) |
| Holding Brake | None |
| IP Rating | IP65 |
| Insulation Class | Class F (155°C) |
| Weight | Approx. 2.1 kg (4.6 lbs) |
Structural Features:
- 80 mm aluminum flange housing — Compact footprint for space-constrained designs.
- Custom winding 8291 — Lower Kv rating for higher torque at lower speeds compared to standard windings.
- Standard optical encoder — 2,500 line glass scale.
- Sealed bearings — Rated for 20,000 hours L10 life at rated speed.
Working Principle:
Identical to standard S700 series: three-phase stator excitation drives permanent magnet rotor; optical encoder provides incremental feedback for servo loop closure. The 8291 winding has fewer turns and thicker wire, shifting the torque-speed curve toward higher torque at lower RPM.
Key Advantages:
- Extended constant-torque range down to 50 RPM — Due to custom 8291 winding.
- Compact 80 mm form factor — Fits tight machine envelopes.
- Higher torque density than standard S36 windings — Up to 20% more continuous torque.
Applicable Industries:
Small robotics axes, Pick-and-place machines, Lab automation, Medical device actuators, Valve positioning.
Installation Requirements:
- Mount on 80 mm bolt circle (4× M5 bolts).
- Verify winding code 8291 matches drive configuration in AKD setup software.
- Encoder cable: use Kollmorgen P/N 105245 or equivalent shielded cable.
Usage Precautions:
- Winding 8291 is not interchangeable with standard S36 windings — drive parameters must be loaded from motor nameplate.
- Do not exceed 4,500 RPM — winding insulation rated for maximum 4,500 RPM.
- Operating temperature range: 0°C to +40°C.
