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Twiflex MS Brake Calipers and Thrusters 

The Twiflex MS series of disc brake calipers is suitable for use with a disc thickness of 12.7mm. Minimum disc diameter is 250mm. 
Normally one or two calipers are used per disc, mounted horizontally (i.e. at the 3 o’clock or 9 o’clock position) to prevent rubbing of one brake pad due to self-weight of the thruster. 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) – 0.03m. 
Brake Pads ( Pack of 4 ) Part No. 0780123-Z -SS4 
Pad Spring . Part No. 7900024 
Please refer to data sheets for more information. 
Data Sheets - Direct Acting 
Data Sheets - Spring Applied 
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