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Phone: +86 16626708626Description
Key Technical Specifications
- Rated Power: 1.4 kW
- Rated Speed: 3,000 min⁻¹ (RPM)
- Rated Current: 4.3 A
- Standstill/Nominal Torque: 6.0–8.0 Nm (figure varies by suffix — confirm against nameplate)
- Protection Rating: IP 64 / IP 65 depending on suffix
- Feedback Interface: RS243 resolver interface, compatible with SERVOSTAR 600 drives
- Mounting: Flange mount
- Ambient Temperature Range: 5 to 40 °C rated, derates above 40 °C (per 6SM series standard)
- Climate Category: 3K3 per EN 50178 (per 6SM series standard)
- Weight: Consult nameplate — figures conflict between listed variants
Product Introduction
The Kollmorgen 6SM 57M-3.000 is a permanent-magnet synchronous servo motor in the 57 mm frame size, rated for 1.4 kW at 3,000 RPM with 4.3 A rated current. It’s built to pair with Kollmorgen SERVOSTAR 600-series drives through the RS243 resolver feedback interface, and it shows up most often in CNC axes, robotic joints, and conveyor drive retrofits running on older Kollmorgen or Danaher Motion control platforms.
Buyers pull this frame size specifically because the flange bolt pattern and resolver connector match existing SERVOSTAR racks — no drive reprogramming needed, just confirm the resolver wiring matches your original unit before installing. IP64/65 sealing keeps it running in shop-floor dust without a full enclosure retrofit.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Motor doesn’t turn, drive shows healthy status | Broken resolver feedback cable or connector | ✅ High | Check RS243 cable continuity, inspect connector pins for corrosion | Replace or reseat cable before condemning motor |
| Drive faults on overcurrent or “Following Error” | Winding short or open phase | ✅ High | Megger test each phase-to-phase and phase-to-ground at 500 V, compare to >10 MΩ baseline | Winding fault is terminal — replace motor |
| Grinding noise or rough rotation by hand | Bearing wear | ✅ High | Power off, rotate shaft by hand, check for roughness or play | Bearing failure confirms hardware replacement |
| Motor overheats under normal load | Undersized duty cycle or mechanical bind in the driven load | ❌ Low | Compare actual load torque against 4.3 A / 6-8 Nm rating | Investigate mechanical load path before replacing motor |
| No motion, drive fault-free | Bad drive output stage, blown fuse on power module | ❌ Low | Measure output voltage at motor terminals with drive commanded to run | Troubleshoot SERVOSTAR drive/PSU first |
| Intermittent motion loss under vibration | Loose terminal block or resolver connector | ❌ Low | Retorque terminals, inspect for chafed cable insulation | Usually a wiring fault, not the motor |
If these checks don’t isolate it, send us the drive’s diagnostic buffer readout and a photo of the resolver wiring — that’s usually enough to tell you whether it’s the motor or the drive side.
6SM 57M-3.000
6SM 57M-3.000
Frequently Asked Questions (FAQ)
Is this still a currently manufactured motor?
No. The 6SM 57M-3.000 is a legacy Kollmorgen frame — it’s been out of production for years. What we sell is pulled and tested surplus stock, not new factory production. We’ll always tell you which one you’re getting.
Will this drop in without modification?
If your flange pattern, shaft, and resolver connector match the original unit you’re pulling, yes. Where people get burned is assuming every 57M suffix is electrically identical — brake options, connector types, and voltage ratings can differ between suffixes. Pull the nameplate off your existing motor and match the full part number before ordering.
Does the drive need reprogramming after the swap?
No. All the motion parameters live in the SERVOSTAR drive, not the motor. As long as the resolver feedback type matches what the drive expects, the swap doesn’t touch your drive configuration.
Why is your price lower than a new unit would cost?
Because there is no new unit — this part is obsolete. You’re paying for a pulled motor that’s been through insulation resistance testing and a load run, not a factory production item. That’s reflected in the price.
What testing do you actually run before shipping?
Visual inspection for corrosion and shaft damage, insulation resistance testing at 500 V (target >10 MΩ phase-to-ground), and a load run with winding temperature monitoring. Ask and we’ll send the test report and photos from the specific serial number you’re buying.
Can I disconnect this while the system is powered?
No. Kill power to the drive before disconnecting the motor or resolver cable. Pulling a live resolver connector risks arcing into the drive’s feedback input — that turns a motor swap into a drive repair.
I’m not sure which suffix I need — how do I confirm?
Send us a nameplate photo of your existing motor, full part number including suffix. The base 6SM 57M-3.000 designation covers multiple electrical variants, and matching the suffix is what keeps this a clean swap instead of a mismatch on power-up.
