BFK458-06-MR Intorq BFK458 Size 25 Brake Manual Hand Release Assembly (401235)

Intorq BFK458 manual hand release assemblies are optional accessories used to mechanically release BFK458 spring‑applied brakes when no power is available, for setup, maintenance or emergency movement of the drive.​

Product overview

• The manual hand release mounts directly to the BFK458 brake and allows the brake to be released by actuating a lever or screw mechanism instead of energising the coil.​
• After operation, the release mechanism returns to its base position, so the brake re-engages when the lever is released and/or supply voltage is restored.​

Function and application

• The hand release temporarily lifts the armature plate from the rotor so the shaft can turn freely, while the brake itself remains a fail‑safe, spring‑applied holding or emergency stop brake when not released.​
• Typical uses include manual positioning, freeing jammed machinery, or moving drives during commissioning and service work where electrical release is not possible.​

Design features

• The assembly is designed as a bolt-on option that can also be retrofitted to compatible BFK458 brake sizes, with mounting threads provided in the brake or associated flange.​
• Release screws and joints are arranged so that forces are applied in tension only, and the release travel is limited by a defined clearance between the armature plate and associated hardware.​

Compatibility and options

• Hand release options are available for all BFK458 sizes, subject to design exceptions such as certain tachobrake combinations.​
• On larger sizes, the brake system can be supplied with monitoring of the hand release lever via microswitches for status feedback into the machine control.​

Installation and use notes

• The assembly is fixed to the brake stator or flange using specified threaded holes and screw sets, and must be installed according to the Intorq/Kendrion mounting instructions for the relevant brake size.​
• The hand release is intended for short‑term operation only and does not replace normal electrical braking; operating limits and lever forces for each brake size are given in the BFK458 technical documentation.​