Kollmorgen 6SM37L-4.000 Servo Motor (Seidel 6SM Series / 4000 rpm)

I. Product Overview

6SM37L-4.000 is a high-performance brushless permanent magnet servo motor from Kollmorgen Seidel's 6SM series. It belongs to the 37-frame (approximately 76mm flange), low inertia (L), 4000 rpm standard model. It features low inertia, high dynamics, smooth high-speed operation, high precision, and compact design. It is suitable for 230VAC/400VAC industrial power grids and is widely used in high-speed point motion, high-frequency reciprocation, precise positioning, and small inertia load automation equipment. 

II. Model Code Analysis (6SM37L-4.000)

6SM: Kolmosen Seidel 6SM series standard brushless servo motor

37: Frame size (37, 76mm square flange)

L: Rotor inertia grade - Low low inertia

4.000: Rated speed - 4000 rpm

III. Core Technical Parameters

(1) Electrical Parameters

Rated Voltage: 230/400VAC (three-phase)

Continuous Stalling Torque: 3.0Nm

Peak Torque: 9.0Nm (3× overload)

Continuous Current: 1.6A

Peak Current: 4.8A

Rated Speed: 4000 rpm

Maximum Speed: 5000 rpm

Torque Constant (Kt): 0.96Nm/A

Reverse Electromotive Force Constant (Ke): 58mV/rpm

Rotor Inertia: ≈0.3kg・cm² (low inertia)

Rated Power: ≈1.2kW

Phase/ Pole Number: Three-phase / 8 poles

Insulation Class: F grade (155℃)

(2) Mechanical Parameters

Flange Size: 76mm × 76mm (37)

Shaft Diameter: 12mm (standard keyway / smooth shaft)

Overall Length: ≈150mm

Weight: ≈2.0kg

Bearings: Double-row precision ball bearings

Cooling Method: Natural cooling (TENV)

(3) Feedback and Connection

Feedback Type: Rotating Transformer / Incremental Encoder (optional)

Connector: M23 Circular Connector (Power + Feedback Separation)

Protection Level: IP65 (Enclosure) / IP54 (Shaft End)

Operating Temperature: -20℃ ~ +40℃

Certifications: CE, UL, RoHS

IV. Product Core Characteristics

Ultra-low inertia with high dynamics

L-level low inertia rotor, inertia only 0.3kg・cm², fast acceleration response, positioning time < 1ms, suitable for high-frequency start-stop, high-speed point motion, and rapid return operation.

High-speed stable operation

8-pole low harmonic winding, minimal tooth槽 torque， fluctuation < 0.5% at 4000 rpm， stable operation， low noise.

Compact high power density

76mm ultra-thin flange， 2kg lightweight body output 3Nm continuous torque， power density increased by 40%， saving installation space.

Industrial-grade reliability

IP65 protection， F grade insulation， metal body， suitable for dusty， oily， and vibrating environments， 24-hour continuous stable operation.

Universal interface compatibility

Standard M23 connection， 76mm universal flange， 12mm shaft diameter， plug-and-play， perfectly compatible with Kolmosen S600/S700/S200 series drivers.

V. Typical Application Scenarios

High-speed automation equipment： Soldering machines， dispensing machines， bonding machines， semiconductor inspection equipment

Precision machinery： Engraving machines， high-gloss machines， precision worktables， laser marking machines

Packaging / Printing： High-speed packaging machines， label machines， digital printing machines， cutting machines

Robots： SCARA robots， Delta robots， lightweight mechanical arms， assembly robots

Medical instruments： Medical imaging， surgical robots， optical positioning， detection equipment

VI. Suggested Accessories and Selection

Compatible Drivers： Kolmosen S61000， S71000， S20330-SRS (3A and above)

Feedback Cables： M23 8-core shielded (rotary transformer / encoder)

Power Cables： M23 4-core shielded (1.5mm²)

Comparison Selection： Compared to 6SM37M (medium inertia)， dynamic response improved by 50%； compared to 6SM45L (large frame)， smaller size， lower cost.

VII. Summary of Product Advantages 6SM37L-4.000 is a 37th 76mm flange, low inertia level L, 3Nm torque, 4000rpm, encoder/encoder feedback, IP65, compact type, high dynamic standard servo motor. Core advantages: low inertia high-speed response, high speed stability, compact high-density, industrial-grade reliability, universal interface. It perfectly meets the requirements of high-speed precision, high-frequency reciprocating, small inertia load, and space-constrained automated equipment, and is an ideal choice for high-end high-speed servo systems.