6SM 77K-3.000 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen 6SM 77K-3.000 is a synchronous servo motor from the 6SM Synchronous Servo Motors series. It features a rated power of 2.7 kW, rated speed of 3000 rpm, and a rated current of 5 Amps, with a peak current of 24 Amps. The motor has a standstill torque of 11 Newton-meters and weighs 9.8 kg.
Internal Product Review
The 6SM 77K-3.000 is a Kollmorgen synchronous servo motor with 2.7 kW rated power and 8.5 Nm rated torque. A rated speed of 3000 rpm and 11 Nm standstill torque support responsive motion control and strong low-speed holding capability. Peak current up to 24 A highlights the motor’s strong dynamic performance for demanding servo applications.
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Product Description:
Kollmorgen’s 6SM 77K-3.000 belongs to the 6SM Synchronous Servo Motors series and serves as a brushless AC servo motor for automated machinery. The motor translates drive commands into tightly regulated shaft motion, supporting coordinated positioning, contouring, and feed functions on packaging lines, CNC tables, and pick-and-place devices. Its electromagnetic performance suits applications that require moderate continuous power and high peak torque.
It delivers a continuous mechanical output of 2.7 kW at a shaft speed of 3000 rpm, corresponding to a rated torque of 8.5 Nm. During rapid acceleration, the phase windings can carry up to 24 A, while continuous operation requires 5 A. The motor has six poles, so the electrical frequency produced at the drive is three times the mechanical rotation frequency. Its torque constant of 1.85 Nm/A relates commanded current to produced torque and supports current-loop tuning in the amplifier. The bearings withstand an axial load of 210 N and a radial load of 730 N, allowing the motor to accommodate belt tension or lateral coupling forces within these limits. The stator circuit has a resistance of 2.2 Ω and an inductance of 18 mH, which affect current rise time and dynamic response.
A standstill torque of 11 Nm supports positional stability when the shaft is stationary. The rotor inertia of 12 kg·cm² balances responsive acceleration with resistance to speed fluctuations when driving mid-mass loads. The motor has a thermal time constant of 25 minutes, allowing short periods of overload without an immediate rise to its maximum winding temperature. The back-EMF gradient is 112 V/1000 rpm, so the drive must supply increasing voltage as motor speed rises. The complete motor weighs 9.8 kg, making it suitable for gantry axes while providing enough mass to resist external vibration and shock.
