INTORQ BFK458-12E – Spring-Applied Electromagnetic Brake | BFK458 Series Platform
Engineering Background: In precision motion control systems — servo axes, hoisting equipment, and automated assembly lines — a brake failure is not merely a mechanical inconvenience. It can mean uncontrolled load drops, damaged tooling, scrapped workpieces, or serious safety incidents. When the power cuts out unexpectedly, the machine must stop and hold — immediately, reliably, every time. Without a properly rated spring-applied brake integrated into the drivetrain, there is no passive safety net. The BFK458-12E exists precisely to fill that critical role.
Product Positioning: The INTORQ BFK458-12E is a DC-energized, spring-applied (fail-safe) electromagnetic brake from INTORQ’s globally recognized BFK458 series — one of the most widely deployed modular brake platforms in European and Asian industrial automation. Size 12 in the BFK458 family, the -12E variant is engineered for mid-range torque applications where compact axial dimensions, fast response, and long service life are non-negotiable. It is the preferred choice for servo motor tail-shaft mounting, gearbox integration, and vertical axis holding in CNC, robotics, and material handling systems.
Complete Technical Specifications
- Manufacturer: INTORQ (Kendrion Group)
- Part Number / SKU: BFK458-12E
- Series: BFK458 (Spring-Applied Modular Brake)
- Operating Principle: Spring-applied, electromagnetically released (fail-safe)
- Size: 12 (BFK458 size designation)
- Rated Voltage: DC (refer to nameplate; typically 24 VDC or 205 VDC variants)
- Mounting: Flange / tail-shaft mount, compatible with standard IEC motor frames
- Weight: approx. 900 g
- Protection Class: IP54 (standard); IP65 available on request
- Insulation Class: F (155°C)
- Ambient Temperature: -20°C to +40°C
- Duty Cycle: 100% ED (continuous energization)
- Standards: CE, RoHS compliant; designed per EN 13849 safety requirements
Note: Exact torque, voltage, and dimensional data are confirmed from the product nameplate and INTORQ official datasheet. Do not rely solely on this listing for safety-critical sizing — always verify with the official BFK458 technical documentation.
Proven Application Environments
- CNC Machining Centers: Spindle and axis holding during tool change or E-stop
- Industrial Robots: Joint braking on vertical and articulated axes
- Servo Motor Systems: Tail-shaft mounting for holding torque without power consumption during standstill
- Hoisting & Lifting Equipment: Fail-safe load holding in cranes, hoists, and elevators
- Automated Assembly Lines: Precision positioning and emergency stop on conveyor and indexing drives
- Packaging Machinery: Controlled stop and hold on high-cycle intermittent drives
- Wind Energy: Pitch and yaw axis braking in wind turbine nacelles
Engineering Advantages
- Fail-Safe by Design: Spring engagement ensures braking force is applied automatically on power loss — no active control signal required for safety
- Fast Response Time: Low-inertia rotor and optimized spring geometry deliver rapid engagement and release cycles
- Modular Architecture: BFK458 series uses standardized interfaces — the -12E integrates directly with INTORQ rectifiers, manual release levers, and monitoring switches without custom adaptation
- Long Service Life: Sintered friction lining with high wear resistance; designed for millions of switching cycles in normal holding applications
- Compact Axial Footprint: Slim profile allows integration into space-constrained motor-gearbox assemblies
- Noise-Optimized: Dampened armature plate reduces engagement noise in precision environments
System Architecture & Signal Flow
The BFK458-12E operates on a simple but robust electromagnetic circuit. Under normal powered conditions, DC voltage is applied to the coil, generating a magnetic field that overcomes the spring force and pulls the armature plate away from the friction disc — the brake is released and the shaft rotates freely. When power is removed (E-stop, power failure, or controlled shutdown), the magnetic field collapses, the springs push the armature plate against the friction disc, and braking torque is applied — the shaft is held.
For system integration, the BFK458-12E is typically paired with:
- INTORQ BEG series rectifiers (AC-to-DC conversion for coil supply)
- INTORQ MSW manual release levers (for maintenance shaft rotation without power)
- INTORQ ÜSW micro-switch monitoring units (for brake wear and engagement status feedback to PLC)
- Servo drives with brake output relay (24 VDC brake control channel)
Sourcing & Quality Verification
At Konmask.com, every INTORQ BFK458-12E unit we supply undergoes the following verification process before dispatch:
- Visual inspection of housing, friction disc, and armature plate for damage or wear
- Coil resistance measurement against INTORQ factory specification
- Manual release function test
- Packaging integrity check with anti-static and moisture protection
- Cross-reference of part number label against INTORQ serial number database where applicable
We source from authorized INTORQ distributors and verified industrial surplus channels. All units are supplied with available documentation including datasheet references and, where available, original factory packaging.
Procurement Process
- Submit Inquiry: Contact us via the product page inquiry form or email support@konmask.com with your required quantity and delivery timeline
- Technical Confirmation: Our engineering team will confirm the BFK458-12E specification matches your application (voltage variant, torque requirement, mounting interface)
- Quotation: Receive a formal quotation with unit price, lead time, and shipping options within 24 business hours
- Order Placement: Confirm order via PO, proforma invoice, or online checkout
- Dispatch & Tracking: Units are dispatched with full tracking; typical international delivery 5–10 business days via DHL/FedEx/UPS
- After-Sales Support: Technical support available post-delivery for installation and commissioning questions
Technical FAQ
- Q: What is the difference between BFK458-12E and BFK458-12?
- A: The “-E” suffix in INTORQ nomenclature typically denotes a specific coil voltage or design variant. Please confirm the exact voltage and torque rating from the nameplate or contact us — we will cross-reference the INTORQ catalog to confirm the precise variant for your application.
- Q: Can the BFK458-12E be used with a 24 VDC servo drive brake output?
- A: Yes, provided the coil voltage of your specific BFK458-12E unit is rated for 24 VDC. Always verify the nameplate voltage before connecting to a drive brake output channel.
- Q: Is a rectifier required?
- A: If your supply is AC (e.g., 230 VAC), an INTORQ BEG rectifier module is required to convert to the DC coil voltage. If your drive provides a DC brake output, no external rectifier is needed.
- Q: What is the typical lead time for BFK458-12E?
- A: For in-stock units, dispatch within 1–3 business days. For sourced units, typical lead time is 7–15 business days. Contact us for current stock status.
- Q: Do you provide a warranty?
- A: Yes. All units supplied by Konmask.com carry a 90-day warranty against manufacturing defects under normal operating conditions. Extended warranty options are available — contact us for details.
- Q: Can you supply the matching INTORQ rectifier and monitoring switch?
- A: Yes. We can supply complete BFK458 brake system packages including BEG rectifiers and ÜSW monitoring switches. Please specify your requirements in your inquiry.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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