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Phone: +86 16626708626Description
Product Model: 6SM37L-4.000
Product Brand: Kollmorgen / Seidel
Product Series: 6SM synchronous servo motors
Product Features:
- 0.5 kW power rating, 4000 rpm speed, 1.5 Nm standstill torque
- 1.5 A rated current, IP64 protection class
- Integrated resolver feedback and built-in thermal sensor (thermostat)
- Designed for use with Kollmorgen Servostar / Servomotor amplifiers; “L” series for dynamic industrial motion control
Technical Features & Benefits
The KOLLMORGEN 6SM37L-4.000 belongs to the 6SM motor family (6SM27…107 series) — a line of brushless synchronous servomotors tailored for demanding industrial applications (robots, machine tools, transfer lines, etc.).
Here are the standout features and how they translate into advantages:
- Rated Power & Torque
The motor delivers 0.5 kW continuous output, with a 1.5 Nm standstill torque rating. At its rated current (~1.5 A), this delivers robust torque for many positioning or motion tasks. - Speed Performance
It is rated for 4000 rpm, making it suitable for applications that demand both speed and torque. - Protection & Robustness
The motor is IP64 rated, meaning it is dust-tight (to a degree) and protected against splashing water. - Feedback & Sensing
A resolver is integrated for rotor position feedback, enabling precise control with matched servo amplifiers.
Also, a thermostat / thermal contact is built into the winding — this is a passive temperature sensor used for monitoring; it is not a full overcurrent / overload protector but helps prevent thermal runaway when integrated with amplifier logic. - Compatibility & Drive Requirements
The motor is designed to be driven by Kollmorgen’s Servostar servo amplifiers (or compatible drives) under torque or speed control modes. It should never be connected directly to mains power. - Construction & Design Notes
It uses rare-earth permanent magnets (neodymium) in the rotor, which enhance dynamic response and torque density.
The motor is brushless, eliminating mechanical brush wear and improving longevity.
Flange temperature under rated continuous operation must not exceed 65 °C to preserve longevity.
In practice, the 6SM37L-4.000 offers a balanced combination of torque, speed, and precision. In retrofit or replacement scenarios, it often replaces older or under-powered motors in motion axes, improving acceleration and stability in production equipment.
- 6SM37L-4.000
Applications & Industry Context
Where does KOLLMORGEN 6SM37L-4.000 shine in the field?
- Machine tools & CNC axes — Because of its good torque/speed balance, it’s a solid choice for rotary axes, spindle servo axes, or indexing axes.
- Industrial robots / pick-and-place systems — Its responsiveness and precision make it viable for smaller robot joints or motion modules.
- Transfer lines / automation conveyors — In synchronized motion lines, the 6SM series motors are used for repeatable, closed-loop motion control.
- Textile, packaging, printing machines — In high-speed servo tasks, its dynamic characteristics suit demanding motion profiles.
- Retrofitted systems — In aging automation infrastructure, dropping in a 6SM37L-4.000 can revitalize performance without full reengineering.
Given its relative “older” part status (the listing indicates it is discontinued) many users purchase refurbished or surplus motors. Radwell, for example, offers new, refurbished, and repaired units with a 2-year Radwell warranty on their sold/repair stock.
Wake Industrial sells it and lists specification details (1.5 Nm, 1.6 A, brake 24 VDC) and mentions its use with Servostar amplifiers.
Technical Specifications Table
Below is a structured spec table collected from various sources. Use it as a comparison base — always cross-check with your motor’s nameplate or OEM datasheet.
| Parameter | Value / Range | Notes / Source |
|---|---|---|
| Motor Series | 6SM synchronous servo motor | From 6SM27..107 series documentation |
| Model | 6SM37L-4.000 | Vendor listing |
| Rated Power | 0.5 kW | Shown in multiple listings |
| Standstill Torque | 1.5 Nm | Vendor specs |
| Rated Current | ~1.5 A (some sources ~1.6 A) | Ubest listing: 1.5 A Wake listing: 1.6 A |
| Speed | 4000 rpm | Multiple sources |
| Protection Rating | IP64 | Ubest listing |
| Weight | ~2.9 kg | Ubest listing |
| Thermal Limit | Flange temp ≤ 65 °C in continuous use | 6SM series documentation |
| Built-in Features | Resolver feedback, thermal sensor (thermostat) | 6SM series spec sheet |
| Discontinued Status | Yes | Radwell lists as discontinued by the manufacturer |
| Typical Price (New / Refurb) | ~US$2,000–3,000 new, ~US$1,600 refurbished | Radwell listing |
Installation & Maintenance Insights
To get the most out of KOLLMORGEN 6SM37L-4.000, here are practical field tips and caveats:
- Matching Amplifier & Configuration
Always run this motor with a properly matched servo amplifier (such as Servostar). Configure the amplifier for the correct pole count, resolver wiring, current limits, and gain settings. Misconfiguration can damage the motor or amplifier. - Thermal Monitoring
The motor’s built-in thermostat contact must be wired to the drive’s thermal input or monitoring circuit to protect against overheating (especially in high-duty environments). The thermostat is not a full overload protection — you must rely on the amplifier’s current limits and monitoring. - Cooling / Heat Dissipation
Provide adequate airflow or heatsinking in the motor’s mounting environment. Avoid insulating the motor’s case or blocking ventilation holes. - Cable & Shielding Practices
Use shielded motor cables and separate power wires from signal wires to reduce electromagnetic interference. Motor cable length beyond certain limits may require chokes or line reactors (as recommended in the 6SM series manual). - Resolver Wiring & Feedback
Use proper shielded twisted pairs for resolver wiring. The feedback line is crucial for accurate positioning. Miswiring or interference here is a common failure mode. - Mounting Considerations
For vertical mounting (shaft up orientation), ensure no liquid ingress at the upper bearing. Avoid mechanical stress on the shaft or coupling that transfers axial loads beyond spec. - Thermal Cycling Caution
Be conscious of expansion/contraction during temperature swings; allow slight mechanical play or proper coupling to avoid binding. - Spare & Repair Strategy
Because this motor is discontinued, keep a spare or refurbished unit. Also, send failed ones to experienced servo motor repair shops. Radwell, for example, offers repair evaluation services for this motor model with estimated repair costs. - Commissioning & Testing
After installation, run step responses, current limits, and open-loop tests to verify dynamic behavior. Warm up the motor and monitor thermal response before loading heavily. - Monitoring Operating Conditions
Track motor currents, temperatures, vibration, and encoder / resolver feedback anomalies. Use these metrics to detect early wear or anomalies.
From field experience: in motion control machines where older motors lacked dynamic torque headroom, replacing them with the 6SM37L-4.000 (where mechanical fit permitted) often improved acceleration and reduced positioning overshoot. But only when the drive settings were carefully adjusted to match.
