Kollmorgen 6SM57M-3.000 Frameless Torque Motor

The Kollmorgen 6SM57M-3.000 is a high-performance frameless torque motor engineered for precision direct-drive applications demanding exceptional power density and smooth motion. As part of Kollmorgen’s 6SM series, this motor eliminates traditional mechanical transmission elements, integrating directly into machinery to deliver zero-backlash rotation with minimal inertia. The 6SM57M-3.000 generates 3,000 oz-in (21.2 Nm) of peak torque in a compact 57mm stack length, leveraging advanced magnetic circuit design for consistent torque output up to 3,000 rpm. Its slotless stator architecture achieves near-zero cogging torque (±0.1% ripple), enabling ultra-smooth velocity control as low as 0.001 rpm – critical for optical alignment, semiconductor metrology, and aerospace positioning systems. With Class H insulation (180°C) and optimized thermal paths, the Kollmorgen 6SM57M-3.000 sustains high torque density in confined spaces while maintaining micron-level repeatability.

Technical Specifications

Ultra-Low Cogging Performance: Slotless stator design eliminates magnetic detent, achieving <±0.1% torque ripple for buttery-smooth rotation – essential for microscopy stages and laser processing.

Optimized Thermal Management: Copper-filled cooling channels and Class H insulation enable continuous torque at 100°C ambient. Integrated thermistors provide real-time thermal protection.

Precision Engineering: Ground mounting surfaces maintain ±5µm parallelism tolerance, ensuring consistent air gap control when embedded in rotary stages or gimbals.

High Dynamic Response: Low rotor inertia (0.0032 kg·m²) allows acceleration to 3,000 rpm in <50ms, ideal for pick-and-place automation and indexing tables.

Custom Integration Ready: Optional modifications include vacuum-compatible materials, redundant windings, or customized flange patterns for aerospace/medical OEMs.

The Kollmorgen 6SM57M-3.000 excels in precision direct-drive scenarios:

Semiconductor Metrology: Rotates wafer inspection stages with <0.1 arc-second jitter

Photonics Manufacturing: Positions fiber alignment fixtures for laser diode coupling

Aerospace Test Rigs: Drives flight simulator motion platforms with silent operation

Medical Imaging: Rotates CT/MRI gantries without electromagnetic interference

Additive Manufacturing: Indexes powder bed fusion platforms with micron-level accuracy

Defense Systems: Embedded in radar antenna positioners for military vehicles

Installation and Maintenance

Pre-installation preparation: Machine mounting interfaces to Ra 0.8µm surface finish. Apply Kollmorgen KTC-1 thermal interface compound between stator and housing. Verify air gap with feeler gauges (±0.05mm tolerance).

Maintenance recommendations: Monitor winding temperature via drive monthly. Clean rotor/stator surfaces annually with non-abrasive solvents. Check rotor runout biannually (<10µm TIR). Relubricate customer-supplied bearings every 10,000 hours.

Product Guarantee

Kollmorgen provides a 24-month warranty against manufacturing defects. Includes lifetime technical support and 10-year spare parts availability. All 6SM57M-3.000 units undergo 72-hour dynamic burn-in testing with torque ripple validation. Critical failure support includes 48-hour expedited replacement for production emergencies.