INTORQ BFK458-16E – Spring-Applied Electromagnetic Brake | Lenze BFK458 Series
Engineering Background: The INTORQ BFK458 series represents Lenze’s flagship line of spring-applied electromagnetic brakes, engineered for safety-critical motion control applications across industrial automation, servo drive systems, and precision machinery. The BFK458-16E is a mid-range model within this series, delivering reliable fail-safe braking performance in demanding environments where power-off braking is mandatory.
Product Positioning: Designed for procurement engineers and OEM integrators specifying brakes for servo motors, hoisting equipment, conveyor systems, and robotics. The BFK458-16E is a direct-mount, flange-type spring-applied brake that engages automatically upon power loss, ensuring personnel safety and process integrity. Sourced directly from authorized INTORQ/Lenze distribution channels and verified for OEM authenticity at Konmask.com.
Complete Technical Specifications
- Manufacturer: INTORQ by Lenze (Germany)
- Model / Part Number: BFK458-16E
- Series: BFK458 Spring-Applied Electromagnetic Brake
- Brake Type: Spring-applied, electromagnetically released (fail-safe)
- Operating Voltage: 24 VDC (standard); rectified AC variants available
- Coil Voltage Options: 24 VDC / 90 VDC / 180 VDC (confirm at order)
- Bore Size: 16 mm (shaft bore)
- Mounting: Flange-mount, direct motor shaft integration
- Enclosure Rating: IP54 (dust-protected, splash-proof)
- Insulation Class: F (155°C)
- Ambient Temperature: -20°C to +40°C
- Country of Origin: Germany (DE)
- Compliance: CE marked; RoHS compliant
- Weight: Approx. 9.26 kg
Proven Application Environments
- Servo motor braking on CNC machining centers and multi-axis robots
- Vertical axis holding brakes on gantry and portal systems
- Hoisting and crane drives requiring fail-safe load holding
- Conveyor and material handling systems with emergency stop requirements
- Packaging machinery and automated assembly lines
- Wind turbine pitch control and yaw braking systems
- Elevator and lift drive systems (EN 81 compliant installations)
Engineering Advantages
- Fail-Safe Operation: Spring engagement ensures braking upon power loss — no power required to hold load
- Rapid Response: Fast engagement and release times for dynamic servo applications
- Compact Flange Design: Direct motor-mount integration minimizes drivetrain length
- Long Service Life: Sintered friction lining rated for high cycle counts with minimal wear
- Manual Release Option: Hand-release lever available for maintenance and setup
- Modular Voltage Compatibility: Multi-voltage coil options simplify global machine builds
- IP54 Protection: Suitable for light industrial wash-down and dusty environments
System Architecture & Signal Flow
The BFK458-16E integrates into servo drive systems as a holding/safety brake on the motor non-drive end (NDE). The brake coil is powered via a dedicated brake rectifier or drive-integrated brake chopper output. Upon drive enable signal, DC voltage energizes the coil, compressing the spring pack and releasing the friction disc — allowing free shaft rotation. On drive disable or E-stop, voltage is removed, springs re-engage the friction disc against the rotor, generating braking torque proportional to spring preload. The “-E” suffix denotes the standard flange variant with integrated cable exit.
Sourcing & Quality Verification
- All INTORQ BFK458-16E units at Konmask.com are sourced from authorized Lenze/INTORQ distribution channels
- Each unit ships with original manufacturer packaging and traceable batch documentation
- Pre-shipment inspection includes coil resistance check, spring engagement verification, and dimensional audit
- Certificate of Conformity (CoC) available upon request
- Counterfeit-risk mitigation: holographic labels and serial number verification against INTORQ factory records
Procurement Process
- Step 1: Confirm shaft bore size, coil voltage, and torque requirement against your motor datasheet
- Step 2: Submit RFQ or place order directly via Konmask.com product page
- Step 3: Receive order confirmation with lead time and shipping estimate within 24 hours
- Step 4: Shipment dispatched with tracking; DDP/DAP Incoterms available for international orders
- Step 5: Technical support available post-delivery for installation and commissioning queries
Technical FAQ
Q: What does the “-16E” suffix mean?
A: “16” refers to the 16 mm shaft bore diameter. “E” denotes the standard flange-mount variant with integrated cable exit.
Q: Can the BFK458-16E be used with AC power directly?
A: No. The brake coil requires DC voltage. A brake rectifier (e.g., INTORQ BEG series) must be used when powering from AC supply.
Q: Is a manual release available?
A: Yes. An optional hand-release lever (suffix “-H”) can be specified for manual disengagement during maintenance.
Q: What is the typical engagement time?
A: Engagement time (t1) is typically 15–40 ms depending on coil voltage and spring preload setting. Refer to the INTORQ BFK458 technical catalog for exact values.
Q: Is this brake compatible with Lenze servo drives?
A: Yes. The BFK458-16E is designed to integrate with Lenze i700, 9400, and ECS servo drive families via the integrated brake output.
Q: What certifications does this product carry?
A: CE marking per EU Machinery Directive 2006/42/EC; RoHS 2 compliant. UL recognition available on select variants.
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