​Conical Rotor Brake Motors

Simple, robust and reliable – these are the key characteristics of the KB conical-rotor brake motors.
Their unique brake operating principle eliminates the need for separate control or additional switching elements. 
This is due to the mechanical connection between the brake and rotor. 

The result:

• particularly high braking performance
• approval for operation with extremely high switching frequencies
• two-speed pole-changing motors
• drives for starting-and-stopping applications and for direct line-fed travel motions
• resistance to temporary overload
• KB motors can be connected to gearboxes via a coupling.

High-performance motor

• Motor output up to 55 kW (at 40% CDF)
• 2, 4, 6 or 8 poles
• Two-speed pole-changing motors
• KBA for starting-and-stopping drives
• KBF for direct line-fed travel motions

Extremely robust brake

• No switching elements needed
• No separate control needed
• Long brake lining service life thanks to effective dissipation of heat generated by the brake (through large surface area of brake cover)
• Short overall length and good heat dissipation (brake disc simultaneously forms the motor fan)
• Two brake disc designs – light for KBA motors, heavy and with increased moment of inertia for KBF motors
• Extremely high switching frequency permitted
• Resistance to temporary overload

---

Outputs up to 55 kW: 4-pole KBA motors

Designation	Output [kW] 40% CDF	Braking torque [Nm]
KBA 71 A4	0.48	6.7
KBA 71 B4	0.72	8.7
KBA 80 A4	1.05	14.5
KBA 80 B4	1.3	17.5
KBA 90 A4	1.65	23
KBA 90 B4	2.0	29
KBA 100 A4	2.4	38
KBA 100 B4	3	48
KBA 112 B4 A	3.6	56
KBA 112 B4	4.5	68
KBA 125 B4 A	6	82
KBA 125 B4	7.4	94
KBA 140 B4 A	9.6	130
KBA 140 B4	11.5	166
KBA 160 B4	20	215
KBA 180 A4	30	335
KBA 200 B4	40	430
KBA 225 B4	55	610