Twiflex MX Brake Calipers and Thrusters

The Twiflex MX13, MX25, MX30 and MX40 series of disc brake calipers is suitable for use with discs of 12.7mm, 25.4mm, 30mm and 40mm thick respectively. The SMX caliper is only suitable for use with discs 12.7mm thick. Minimum disc diameter is 300mm.

The MX/SMX calipers may be used with any of the Twiflex series of thrusters and feature a patented link mechanism to ensure uniform pad wear.

Normally one or two calipers are used per disc, but the number may be increased depending on disc size. The brakes may be positioned at any angle around the periphery of the disc, but should ideally be mounted horizontally (i.e. at the 3 o’clock or 9 o’clock position). If the caliper mounting angle is greater than 10° from the horizontal, or on vertical shaft applications, it should be fitted with an inclined mounting kit or equalizing link. A range of brake discs is available from Howdon (see Disc and Hub Assemblies).

For pneumatic operation use dry, filtered and non-lubricated compressed air. Pneumatic brakes require a control valve, operated either manually or by pneumatic or electrical signal.

The ratings shown on the graphs are based on fully bedded in and conditioned brake pads with a nominal friction coefficient μ = 0.4. Howdon disc brakes must be used with Twiflex asbestos free brake pads.

Effective disc radius = actual radius (m) – 0.033m.

Twiflex MX Series Calipers


  • Arm Assembly -Thruster Part No. MX13-6630145
  • Arm Assembly -Slotted Part No. MX13-6630146
  • Caliper Base Part No. MX13-8030025
  • Pivot Pin Part No. MX13-7952383
  • Retaining Plate Part No. MX13-7951480
  • Spring Anchor Plate Part No. MX13-7951501
  • Pad Assembly ( 2 Pads ) Part No. MX13-7080118-Z-SS2
  • Spring Kit Part No. MX13-7902813

Please refer to data sheets for more information.

Download PDF data sheets

Direct Acting
Spring Applied

Buy your industrial brakes and spares direct from our warehouse, or talk to one of our experienced engineers today to discuss your requirements.  +44 (0) 1453 750814