Description
Product Introduction
The Kollmorgen 6SM57M-3.000 is a high-performance AC synchronous servo motor engineered under the Kollmorgen Seidel brand for heavy-duty motion applications. Plant engineers deploy this motor on high-torque industrial axes across CNC metalworking machinery, automated stamping presses, plastic extrusion systems, and large gantry robotics.
Featuring a Frame Size 5 housing with a Medium stack length, the 6SM57M-3.000 uses neodymium permanent magnets and integrated resolver feedback to deliver smooth low-speed performance alongside dynamic response. In our field experience, replacing a damaged motor with this exact spec preserves factory shaft dimensions and electrical winding profiles, eliminating the need to redesign mechanical mounts or adjust drive current limits.
Key Technical Specifications
| Parameter | Value |
| Part Number | 6SM57M-3.000 |
| Manufacturer | Kollmorgen (Seidel Servo Systems) |
| Motor Type | Permanent Magnet AC Synchronous Servo |
| Frame Size / Series | 6SM Series – Size 5 |
| Stack Length | M (Medium Stack) |
| Rated Speed (n_N) | 3000 RPM |
| Feedback Unit | Integrated Two-Pole Resolver (Standard) |
| Winding Insulation | Class F (155°C) |
| Enclosure Rating | IP65 (excluding shaft pass-through) |
| Cooling Method | Natural Convection / External Heat Dissipation |
Application Scenarios & The “Trench” Experience
A automotive press shop suffered an unscheduled line outage when the transfer beam feeder motor threw an overcurrent trip on axis 2. The maintenance team discovered that coolant migration past an aged shaft seal had contaminated the motor windings and resolver feedback circuit. With stamping schedules backed up, replacing the larger Frame 5 motor with a non-native brand meant days of lead time to cut adapter plates and tune fresh drive parameters.
- Automotive Stamping – Feed Mechanism Actuators – Drives high-duty-cycle positioning levers under heavy loads.
- CNC Heavy Machining – Spindle & Axis Drives – Maintains tight velocity control across tough metal-cutting sequences without cogging.
- Plastics & Extrusion – Flying Cut-Off Saws – Delivers instant torque spikes to match continuous linear material feed rates.
The shift supervisor pulled a bench-tested 6SM57M-3.000 surplus unit from inventory. Because the internal resolver alignment matched factory standards out of the box, the drive connected cleanly on the first enable command, restoring full production within two hours.
6SM57M-3.000
6SM57M-3.000
Transparency SOP: Quality Assurance & Testing
We do not just ship boxes; we test them on live Kollmorgen servo drive test benches. Every 6SM57M-3.000 motor undergoes the following verification process:
- Inbound Mechanical Inspection: Checked for shaft runout, smooth bearing operation, keyway integrity, and connector housing condition.
- Winding Resistance & Insulation Check: Phase-to-phase balance is verified, followed by a 1000V Megger test to confirm zero ground leakage or insulation degradation.
- Resolver Alignment Verification: Oscilloscope checks verify that back-EMF voltage matches resolver feedback signals for accurate commutation.
- Dynamic Drive Run Test: Spun to its full 3000 RPM rated speed on a SERVOSTAR drive array to monitor thermal rise, vibration levels, and current draw.
- Protective Packaging: Heavy-duty packaging with custom foam stabilization around the shaft and heavy metal connectors to protect against shipping damage.
The Veteran’s Tech Trap Guide (Crucial Value-Add)
- ⚠️ Mind the Weight and Mounting Torque: Frame 5 motors carry significant mass. When bolting the 6SM57M-3.000 to the machine frame, use a calibrated torque wrench and threadlocker on all flange bolts. Loose mounting hardware under high acceleration will cause vibrational resonance that destroys shaft bearings.
- ❗ Never Force-Fit Couplings: Avoid using a mallet to force couplings or gearheads onto the shaft extension. Impact loads pass directly through the shaft, which can crack internal resolver components or cause raceway brinelling in the bearings. Always use a draw-bolt tool.
- ⚠️ Do Not Shift the Rear Resolver Plate: Never loosen the screws on the rear end-housing cover. Shifting the internal resolver assembly alters the commutation zero-point relative to the stator poles, which causes motor runaway or immediate overcurrent trips upon power-up.
Frequently Asked Questions (FAQ for Conversion)
Q: What does the “3.000” in the part number designate?
A: The “3.000” designates the rated nominal speed of 3000 RPM for this specific motor winding configuration.
Q: Can I use this motor with a third-party servo drive?
A: Yes, provided the third-party drive is designed for AC synchronous permanent magnet motors and supports standard 2-pole resolver feedback inputs.
Q: Is the 6SM57M-3.000 equipped with a holding brake?
A: The standard base part number designates a non-brake configuration. If your vertical axis requires a 24V integrated holding brake, verify the full nameplate code or suffix additions prior to ordering.
Q: What happens if the motor instantly trips the drive on startup?
A: Instant overcurrent or runaway upon power-up typically indicates swapped motor phases (U, V, W) or altered resolver alignment. Verify connector pinouts against the drive manual before re-enabling power.
Q: What warranty is included with this surplus motor?
A: We back all our new surplus and rig-tested 6SM57M-3.000 servo motors with a full 12-month replacement warranty.
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