B-106-A-21-S Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen B-106-A-21-S is a servo motor from the Goldline B and BH Motors series with a rated power of 0.90 kW and a rated speed of 4200 RPM. It features a continuous stall torque of 2.20 N-m, peak stall torque of 6.18 N-m, and comes with IP67 sealing for environmental protection. The motor has a standard metric mounting style and a bayonet connection style.
Internal Product Review
The B-106-A-21-S is a Kollmorgen Goldline servo motor with 0.90 kW rated power and 4200 RPM rated speed. IP67 sealing and standard metric mounting support dependable integration in demanding motion systems. Strong torque performance is a standout, highlighted by 6.18 N-m peak stall torque.
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Product Description:
The B-106-A-21-S is an AC servo motor manufactured by Kollmorgen within the Kollmorgen Goldline B and BH Motors series. It supplies torque and speed control to positioning tables, pick-and-place heads, and other automation axes that require repeatable motion under digital drive commands. A standard metric mounting interface aligns the housing with gearboxes or machine frames, while the bayonet power and feedback connector simplifies field wiring. Mating plugs are not included with the motor, so compatible plugs must be selected for the intended cable set.
This model delivers a continuous mechanical output of 0.90 kW while operating at a rated speed of 4200 rpm. During sustained operation, the motor supplies 2.20 N·m of continuous stall torque at a continuous stall current of 3.0 A RMS. The winding-to-case thermal resistance is 0.87 °C/W, which affects the transfer of winding heat to the motor housing. The back electromotive force constant is 43.7 Vrms/krpm, a value used when selecting a compatible drive voltage and configuring velocity control. The phase resistance is 6.50 Ω, which contributes to voltage drop and winding heat as current passes through the motor. A rotor inertia of 7.65 × 10⁻⁵ kg·m² supports responsive acceleration in positioning applications. The line voltage may reach 250 Vrms, placing the motor within the operating range of many 200–240 V inverter systems.
For transient moves, the motor can produce a peak torque of 6.18 N·m when the drive supplies a peak current of 9.0 A RMS. These ratings establish the permissible short-term load range before magnetic saturation or excessive heating becomes a concern. The phase inductance is 37.5 mH, which affects current rise time and amplifier current-loop response. The motor has an IP67 protection rating, providing complete protection against dust and protection against temporary immersion under the applicable test conditions. This protection requires properly installed seals and a compatible IP67 mating connector at the electrical interface. The standard metric mounting holes support direct installation in machinery exposed to washdown spray or coolant, provided the complete installation preserves the required enclosure protection.
