Simple, robust and reliable
Simple, robust and reliable
Conical-rotor brake motors
Conical-rotor brake motors
Starting and stopping with maximum performance
Simple, robust and reliable – these are the key characteristics of our 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 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.
Learn more about the KBA and KBF motors for your next project on our blog!
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Your Contact
Demag Cranes & Components Corp.
Demag Cranes & Components Corp.
6675 Parkland Blvd., Suite 200
Cleveland, Ohio 44139
United States
Product information
The benefits at a glance
High-performance motor
- Motor output up to 88 HP (55 kW) (at 40% CDF)
- 2, 4, 6 or 8 poles
- Two-speed 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
Convenient online configuration with Demag Drive Designer
- View technical data
- Design support by means of 2D and 3D geometries in all standard file formats
- Provision of electrical circuit diagrams
- Delivery time indicator
- Transfer selected configuration to Demag Shop
Many further options and accessories
Motor and gearbox combinations
Coupling connection
Gearbox and motor combinations with Demag coupling shaft end (Z cylindrical-rotor motors or KB conical-rotor brake motors) using intermediate flange and roller spider coupling
Technical data
For outputs up to 88 HP (55 kW): 4-pole KBA motors
| Designation | Output HP [kW] 40% CDF |
Braking torque lb-ft [Nm] |
| KBA 71 A4 | 0.77 (0.48) | 4.9 (6.7) |
| KBA 71 B4 | 1.15 (0.72) | 6.0 (8.7) |
| KBA 80 A4 | 1.70 (1.05) | 16.5 (14.5) |
| KBA 80 B4 | 2.1 (1.3) | 13.0 (17.5) |
| KBA 90 A4 | 2.70 (1.65) | 17.0 (23) |
| KBA 90 B4 | 3.2 (2.0) | 21.0 (29) |
| KBA 100 A4 | 3.9 (2.4) | 28 (38) |
| KBA 100 B4 | 4.8 (3) | 35 (48) |
| KBA 112 B4 A | 5.9 (3.6) | 41 (56) |
| KBA 112 B4 | 7.2 (4.5) | 50 (68) |
| KBA 125 B4 A | 9.7 (6) | 60 (82) |
| KBA 125 B4 | 12.0 (7.4) | 69 (94) |
| KBA 140 B4 A | 15.5 (9.6) | 96 (130) |
| KBA 140 B4 | 18.5 (11.5) | 122 (166) |
| KBA 160 B4 | 32 (20) | 157 (215) |
| KBA 180 A4 | 48 (30) | 246 (335) |
| KBA 200 B4 | 64 (40) | 325 (430) |
| KBA 225 B4 | 88 (55) | 450 (610) |
Line-fed travel applications: 8/2-pole KBF motors
| Designation | Output HP [kW] 40/40% CDF |
Braking torque lb-ft [Nm] |
| KBF 71 A 8/2 | 0.07/0.32 (0.04/0.2) | 0.81 (1.4) |
| KBF 71 B 8/2 | 0.10/0.48 (0.06/0.3) | 1.2 (1.6) |
| KBF 80 A 8/2 | 0.21/0.8 (0.13/0.5) | 2.0 (3.2) |
| KBF 90 A 8/2 | 0.32/1.3 (0.2/0.8) | 3.2 (5.2) |
| KBF 100 A 8/2 | 0.42/1.95 (0.26/1.2) | 4.6 (7.0) |
| KBF 112 A 8/2 | 0.67/3.1 (0.42/1.9) | 6.6 (11.8) |
| KBF 125 A 8/2 | 1.05/4.7 (0.65/2.9) | 8.6 (17) |
| KBF 140 A 8/2 | 1.8/7.2 (1.1/4.5) | 14.2 (24.3) |
Equipment options
Motors
| Options | Cylindrical-rotor motor Z |
Conical-rotor brake motor KB |
| Winding protection | ||
| PTC thermistor | • | • |
| Temperature detectors | • | • |
| Rotary encoder | ||
| Integral pulse generator | • | • |
| External pulse generator | • | • |
| Integrated external pulse generator | • | |
| Electrical plug connector | • | • |
| Increased enclosure | • | • |
| Anti-condensation heater | ||
| Heating tape | • | • |
| Via motor winding | • | |
| External fan | ||
| Additional integrated fan | • | |
| Additional external fan | • | • |
| Heavy fan | • | |
| Heavy brake disc | • | |
| Canopy/round protection panel | • | • |
Brakes
| Options | Cylindrical-rotor motor Z |
Conical-rotor brake motor KB |
| Manual brake release unit | • | • |
| Brake function monitoring | • | |
| Brake adjustment monitoring | • | |
| Sealed/increased enclosure | • | |
| Various control modules | • | |
| Enclosed brake compartment | • | |
| Emergency-stop brake lining | • |
