Description
The Demag KBA 80 A 4 is a premium, German-engineered conical-rotor brake motor built specifically for high-frequency starting-and-stopping drives. Manufactured by Demag Cranes & Components, this reliable 3-phase AC motor is a staple in material handling systems, hoist units, and overhead crane travel mechanisms.
Unique Conical-Rotor Braking Technology
Unlike traditional electric motors that rely on external electronic brake modules, this unit uses an integrated mechanical principle. When electrical power is applied to the Demag KBA 80 A 4, magnetic forces create an axial displacement that pulls the rotor forward, instantly releasing the mechanical brake.
Consequently, when power is disconnected, a heavy-duty internal spring thrusts the rotor back into the brake lining to ensure immediate, failsafe stopping. Therefore, this eliminates secondary braking delays and guarantees pinpoint positioning accuracy. Furthermore, because the braking action is entirely mechanical, it functions reliably even during a sudden power outage.
Core Technical Features
To help you verify compatibility with your existing crane setup, here is a detailed breakdown of the manufacturer specifications:
- Manufacturer details: Developed and built by Demag Cranes & Components GmbH.
- Model identification: Designated as type KBA 80 A 4 with part number 70764929.
- Power output: Delivers a reliable 0.83 kW of power.
- Rotational speed: Operates at a rated speed of 1360 r/min.
- Voltage configuration: Configured for 230 / 400 V delta-star 3-phase AC setups.
- Frequency standard: Engineered to run on standard 50 Hz industrial power lines.
- Current draw: Draws 4.50 A at 230V and 2.60 A when wired at 400V.
- Duty cycle: Rated for 100% ED continuous industrial operation.
- Environmental protection: Rated at IP 54 for excellent dust and splash resistance.
- Mounting type: Features the popular IM B14 flange face-mount configuration.
Performance & Safety Ratings
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- Rated Current: 4.50 A (at 230V) / 2.60 A (at 400V)
- Duty Cycle: 100% ED (Continuous Duty capability)
- Power Factor (cos φ): 0.72
- Enclosure Protection: IP 54 (Dust and splash-resistant)
- Brake Protection: IP 20
- Mounting Arrangement: IM B14 (Flange/face mount with integrated threaded holes)
- Standard Compliance: EN 60034-1
Built for Demanding Crane and Hoist Environments
Due to its robust 100% ED (intermittent periodic duty) engineering, this motor handles repetitive starts and stops without risking thermal breakdown. The IM B14 face-mount structure allows it to slide perfectly into standard gearboxes or wheel block assemblies, such as the Demag DRS wheel block system.
Product Condition & Authenticity
This is an authentic, genuine Demag unit featuring original factory nameplates and stickers. It is in excellent physical and structural condition, showing clean shaft splines and undamaged housing threads.
