Holes 13 dia (M12-87Nm)

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1 MR Disc Brake Caliper DS Disc Thickness 3 Holes 3 (M - 87Nm) Braking path Disc Brake Caliper Part Number Weight Pad wear allowance Total pad area Pad dimensions new Pad material 6.5 kg 8mm 58cm ( Pads) 63.5 x 46 x.7mm thick Asbestos-free high friction material The standard MR series brake caliper is supplied as a right-hand assembly (as shown above). Left-hand assembly can be supplied on request or can easily be changed on site. A marine version is available. AVAILABLE SPARES Item Component Part No. QTY Arm Assembly - Thruster side 6600 Arm Assembly - Opposite Side Caliper Base Pad Assembly ( pad) Z 5 Tension Spring Torsion Spring Pad Spring Spring Kit (items 5 and 6) 7908 Twiflex Disc Brakes must be used with Twiflex asbestos free brake pads. The use of any other brake pads will invalidate the warranty. Twiflex Limted reserves the right to modify or change the design without prior notice.

2 MR Disc Brake Caliper General Description The MR disc brake calipers should be used with a brake disc of.7mm thick. They may be used with any of the series of actuators listed below. Normally one or two units will be used per disc but the number may be increased, depending on disc size and brake torque required. Thruster Description Data Sheet Maximum Braking Force kn A Pneumatically applied - Spring released B Pneumatically applied - Spring released D Pneumatically applied - Spring released E Pneumatically applied - Spring released G Pneumatically applied - Spring released H Mechanically applied - Lever operated K Spring applied - Pneumatically released 007., 4.3 and 6.4 L Spring applied - Hydraulically released 008., 4.3 and 6.4 W Mechanically applied - Hand operated Mounting: MR brake calipers can be mounted at any angle around the periphery of the disc, but ideally they should be horizontal in the 3 and 9 o clock position on the disc to prevent bias due to the weight of the thruster. Inclined mounting kits are available. Discs: A range of standard discs of.7mm thick are available from Twiflex see Data Sheet DS050. Minimum Disc Diameter for the MR caliper is 50mm Controllers: Standard Twiflex Controllers are available for single or multi-caliper installations for use with electric, pneumatic and hydraulic signalling systems. Pad Replacement: To replace the pads, secure the installation to ensure safety. Ease out the pad springs and remove worn pads. Clean the disc and pad mounts with a suitable cleaning agent such as white spirit. Fit new pads. Replace pad springs. For bedding-in and conditioning procedures see Publication M060 Health and Safety data sheet reference to DS Briar Road, Twickenham Middlesex TW 6RB - England +44 (0) Fax: +44 (0) This approval is in Accordance with Certificate number 8508 Issue 04 June 009 Twiflex 00. DS000 / Printed in USA

3 MRA Disc Brake Caliper - Pneumatically Applied, Spring Released Nominal dimensions given For caliper dimensions see DS DS00 G3/8 (3/8" BSP 3 36 New pads 39 Worn pads 47 New pads 9.5 Worn pads 37.5 Air Pressure - bar Disc Diameter mm Weight (caliper and thruster) - 7.8kg (thruster only) -.3kg Volume displacement of thruster at full stroke is 300ml. Maximum Pressure 7 bar Maximum Braking Force = 7 bar Braking Torque - Nm The ratings shown on the above graph are based on fully bedded and conditioned brake pads with nominal friction coefficient μ=0.4. For bedding-in and conditioning procedures see Publication M060. Braking Force is defined as the Tangential Force acting on the brake disc at the Effective Disc Radius. Braking Torque (Nm) = Braking Force (N) x Effective Disc Radius (m) where Effective Disc Radius = Actual Disc Radius Twiflex Disc Brakes must be used with Twiflex asbestos free brake pads. The use of any other brake pads will invalidate the warranty. Twiflex Limted reserves the right to modify or change the design without prior notice.

4 MRA Disc Brake Caliper - Pneumatically Applied, Spring Released 40 3A/F Air Inlet G 3/8 (3/8" BSP) 5.9 G3/ Max. Stroke Section - This range of pneumatically operated brakes uses dry and filtered compressed air at pressures up to 7 bar. Pneumatic brakes require a control valve which may be operated either manually, or by pneumatic or electric signal. Should it become necessary to replace a phragm, ensure air supply is disconnected, remove the M5 bolts and the rear cap of the thruster. Remove the worn phragm; clean-up the contacting surfaces and re-assemble with the new phragm and bolts in position (Tightening Torque 5.7Nm). Thruster Part Number Available Spares Item Component Part No. Diaphragm Kit Piston Rod Assembly Caliper Arms Thruster Fitment. Offer thruster to caliper making sure that both lock nuts are removed before placing push rod through caliper arm.. Fit lock nuts over the push rod and locate it s end within the slot of the other arm. 3. Tighten one lock nut to Nm then tighten the second nut against the first. Pushrod Locknuts Thruster 9 Briar Road, Twickenham Middlesex TW 6RB - England +44 (0) Fax: +44 (0) This approval is in Accordance with Certificate number 8508 Issue 04 June 009 Twiflex 00. DS00 / Printed in USA

5 MRB Disc Brake Caliper - Pneumatically Applied, Spring Released Nominal dimensions given For caliper dimensions see DS000 8 DS00 G3/8 (3/8" BSP 3 57 New pads 39 Worn pads 47 New pads 9.5 Worn pads 38.5 Disc Diameter mm Air Pressure - bar Weight (caliper and thruster) kg (thruster only) -.06kg Volume displacement of thruster at full stroke is 46ml. Maximum Pressure 7 bar Maximum Braking Force = 7 bar Braking Torque - Nm The ratings shown on the above graph are based on fully bedded and conditioned brake pads with nominal friction coefficient μ=0.4. For bedding-in and conditioning procedures see Publication M060. Braking Force is defined as the Tangential Force acting on the brake disc at the Effective Disc Radius. Braking Torque (Nm) = Braking Force (N) x Effective Disc Radius (m) where Effective Disc Radius = Actual Disc Radius Twiflex Disc Brakes must be used with Twiflex asbestos free brake pads. The use of any other brake pads will invalidate the warranty. Twiflex Limted reserves the right to modify or change the design without prior notice.

6 MRB Disc Brake Caliper - Pneumatically Applied, Spring Released 8 Air Inlet G 3/8 (3/8" BSP) 3A/F 5.9 G3/ Max. Stroke 68 Section - This range of pneumatically operated brakes uses dry and filtered compressed air at pressures up to 7 bar. Pneumatic brakes require a control valve which may be operated either manually, or by pneumatic or electric signal. Should it become necessary to replace a phragm, ensure air supply is disconnected, remove the M5 bolts and the rear cap of the thruster. Remove the worn phragm; clean-up the contacting surfaces and re-assemble with the new phragm and bolts in position (Tightening Torque 5.7Nm). Thruster Part Number Available Spares Item Component Part No. Diaphragm Kit Piston Rod Assembly Dia Air Inlet 3A/F G 3/8 (3/8 BSP) Thruster Fitment 5.9 G3/ Offer thruster to caliper making sure that both lock nuts are removed before placing push rod through caliper arm Max Stroke 68. Fit lock nuts over the push rod and locate it s end within the slot of the other arm. Section - 3. Tighten one lock nut to Nm then tighten the second nut against the first. 9 Briar Road, Twickenham Middlesex TW 6RB - England +44 (0) Fax: +44 (0) This approval is in Accordance with Certificate number 8508 Issue 04 June 009 Twiflex 00. DS00 / Printed in USA

7 MRD Disc Brake Caliper - Pneumatically Applied, Spring Released DS003 Nominal dimensions are given For caliper dimensions see DS000 G/4 (/4" BSP) New pads 7 Worn pads 35 New pads 7.5 Worn pads 5.5 bar - Pressure Air Disc Diameter mm Weight (caliper and thruster) kg (thruster only) -.5kg Volume displacement of thruster at full stroke is 50ml. Maximum pressure 7 bar Maximum Braking Force Braking Torque - Nm The ratings shown on the above graph are based on fully bedded and conditioned brake pads with nominal friction coefficient µ=0.4. For bedding-in and conditioning procedures see Publication M060. Braking Force is defined as the Tangential Force acting on the brake disc at the Effective Disc Radius. Braking Torque (Nm) = Braking Force (N) x Effective Disc Radius (m) where Effective Disc Radius = Actual Disc Radius Twiflex Disc Brakes must be used with Twiflex asbestos free brake pads. The use of any other brake pads will invalidate the warranty. Twiflex Limted reserves the right to modify or change the design without prior notice.

8 MRD Disc Brake Caliper - Pneumatically Applied, Spring Released Air Inlet G/4(/4" BSP) 3A/F 5.9 G3/ Max. Stroke Section - Thruster Part Number This range of pneumatically operated brakes uses dry and filtered compressed air at pressures up ot 7 bar. Pneumatic brakes require a control valve which may be operated either manually, or by pneumatic or electrical signal. Thruster Part Number Available Spares Item Component Part No. Diaphragm Kit Piston Rod Assembly Should it become necessary to replace a phragm, ensure air supply is disconnected, remove the M5 botls and the rear cap of the thruster. Remove the worn phragm; clean-up the contacting surfaces and re-assemble with the new phragm and botls in position. (Tightening Torque 5.7Nm) Thruster Fitment. Offer thruster to caliper making sure that both lock nuts are removed before placing push rod through caliper arm. Caliper Arms. Fit lock nuts over the push rod and locate it s end within the slot of the other arm. 3. Tighten one lock nut to Nm then tighten the second nut against the first. Pushrod Locknuts Thruster 9 Briar Road, Twickenham Middlesex TW 6RB - England +44 (0) Fax: +44 (0) This approval is in Accordance with Certificate number 8508 Issue 04 June 009 Twiflex 00. DS003 / Printed in USA

9 MRE Disc Brake Caliper - Pneumatically Applied, Spring Released DS004 Nominal dimensions are given For caliper dimensions see DS G/4 (/4" BSP) New pads 44 Worn pads 5 New pads 34.5 Worn pads 4.5 Air Pressure - bar Disc Diameter mm Weight (caliper and thruster) kg (thruster only) kg Volume displacement of thruster at full stroke is 5ml. Maximum pressure 7 bar Maximum Braking Force Braking Torque - Nm The ratings shown on the above graph are based on fully bedded and conditioned brake pads with nominal friction coefficient µ=0.4. For bedding-in and conditioning procedures see Publication M060. Braking Force is defined as the Tangential Force acting on the brake disc at the Effective Disc Radius. Braking Torque (Nm) = Braking Force (N) x Effective Disc Radius (m) where Effective Disc Radius = Actual Disc Radius Twiflex Disc Brakes must be used with Twiflex asbestos free brake pads. The use of any other brake pads will invalidate the warranty. Twiflex Limted reserves the right to modify or change the design without prior notice.

10 MRE Disc Brake Caliper - Pneumatically Applied, Spring Released 80 3A/F 5.9 G3/4 6.4 G/4(/4" BSP) Section - Thruster Part Number This range of pneumatically operated brakes uses dry and filtered compressed air at pressures up ot 7 bar. Pneumatic brakes require a control valve which may be operated either manually, or by pneumatic or electrical signal. Thruster Fitment. Offer thruster to caliper making sure that both lock nuts are removed before placing push rod through caliper arm. Caliper Arms. Fit lock nuts over the push rod and locate it s end within the slot of the other arm. 3. Tighten one lock nut to Nm. Pushrod Locknuts Thruster 9 Briar Road, Twickenham Middlesex TW 6RB - England +44 (0) Fax: +44 (0) This approval is in Accordance with Certificate number 8508 Issue 04 June 009 Twiflex 00. DS004 / Printed in USA

11 MRG Disc Brake Caliper - Pneumatically Applied, Spring Released DS005 Nominal dimensions are given For caliper dimensions see DS000 G/4 (/4" BSP) New pads 44 Worn pads 5 New pads 34.5 Worn pads 4.5 bar - Pressure Air Disc Diameter mm Weight (caliper and thruster) - 6.8kg (thruster only) - 0.3kg Volume displacement of thruster at full stroke is 64ml. Maximum pressure 7 bar Maximum Braking Force 7bar Braking Torque - Nm The ratings shown on the above graph are based on fully bedded and conditioned brake pads with nominal friction coefficient µ=0.4. For bedding-in and conditioning procedures see Publication M060. Braking Force is defined as the Tangential Force acting on the brake disc at the Effective Disc Radius. Braking Torque (Nm) = Braking Force (N) x Effective Disc Radius (m) where Effective Disc Radius = Actual Disc Radius Twiflex Disc Brakes must be used with Twiflex asbestos free brake pads. The use of any other brake pads will invalidate the warranty. Twiflex Limted reserves the right to modify or change the design without prior notice.

12 MRG Disc Brake Caliper - Pneumatically Applied, Spring Released 80 3A/F 5.9 G3/4 6.4 G/4(/4" BSP) Section - Thruster Part Number This range of pneumatically operated brakes uses dry and filtered compressed air at pressures up to 7 bar. Pneumatic brakes require a control valve which may be operated either manually, or by pneumatic or electrical signal. Thruster Fitment. Offer thruster to caliper making sure that the lock nut is removed before placing push rod through caliper arm. Caliper Arms. Fit lock nut over the push rod and locate it s end within the slot of the other arm. 3. Tighten the lock nut against the arm to Nm. Pushrod Locknuts Thruster 9 Briar Road, Twickenham Middlesex TW 6RB - England +44 (0) Fax: +44 (0) This approval is in Accordance with Certificate number 8508 Issue 04 June 009 Twiflex 00. DS005 / Printed in USA

13 MRH Disc Brake Caliper - Mechanically Applied, Lever Operated DS006 Nominal dimensions are given For caliper dimensions see DS000 FORCE deg Max New pads 36 Worn pads 44 New pads 6.5 Worn pads 34.5 F orce on Lever - N Disc Diameter mm Weight (caliper and lever) - 7.9kg (lever only) -.4kg Maximum force on lever 0.9kN Maximum Braking Force = 0.9kN force on lever Braking Torque - Nm The ratings shown on the above graph are based on fully bedded and conditioned brake pads with nominal friction coefficient µ=0.4. For bedding-in and conditioning procedures see Publication M060. Braking Force is defined as the Tangential Force acting on the brake disc at the Effective Disc Radius. Braking Torque (Nm) = Braking Force (N) x Effective Disc Radius (m) where Effective Disc Radius = Actual Disc Radius Twiflex Disc Brakes must be used with Twiflex asbestos free brake pads. The use of any other brake pads will invalidate the warranty. Twiflex Limted reserves the right to modify or change the design without prior notice.

14 MRH Disc Brake Caliper - Mechanically Applied, Lever Operated 6 3 A/F G3/ Section A - A Lever Assembly Part Number Lever Fitment. Offer lever to caliper making sure that both lock nuts are removed before placing push rod through caliper arm. Caliper Arms. Fit lock nuts over the push rod and locate it s end within the slot of the other arm. 3. Tighten one lock nut to Nm then tighten the second nut against the first. Pushrod Locknuts Thruster 9 Briar Road, Twickenham Middlesex TW 6RB - England +44 (0) Fax: +44 (0) This approval is in Accordance with Certificate number 8508 Issue 04 June 009 Twiflex 00. DS006 / Printed in USA

15 MRW Disc Brake Caliper - Mechanically Applied, Hand Operated DS009 Nominal dimensions are given For caliper dimensions see DS New pads 45 Worn pads 53 New pads 35.5 Worn pads 43.5 (N) Force Spring Disc Diameter mm Weight (caliper and hand knob) - 7.8kg (hand knob only) -.3kg turn of hand knob = 50N braking force Maximum Braking Force =.68kN Braking Torque - Nm (Full Rate) The ratings shown on the above graph are based on fully bedded and conditioned brake pads with nominal friction coefficient µ=0.4. For bedding-in and conditioning procedures see Publication M060. Braking Force is defined as the Tangential Force acting on the brake disc at the Effective Disc Radius. Braking Torque (Nm) = Braking Force (N) x Effective Disc Radius (m) where Effective Disc Radius = Actual Disc Radius Twiflex Disc Brakes must be used with Twiflex asbestos free brake pads. The use of any other brake pads will invalidate the warranty. Twiflex Limted reserves the right to modify or change the design without prior notice.

16 MRW Disc Brake Caliper - Mechanically Applied, Hand Operated 76 3A/F 00 (APPROXIMATELY WITH UNCOMPRESSED SPRING) Hand Knob Assembly Part Number Thruster Fitment Caliper arms. Offer hand knob assembly to caliper making sure that one lock nut is removed before placing push rod through caliper arm.. Fit a lock nut over the push rod and locate the push rod within the slot of the opposite arm. 3. Adjust the lock nuts unti lthe push rod contacts the Push rod Locnuts Thruster opposite arm. 4. Tighten the lock nuts to 50-60Nm. 9 Briar Road, Twickenham Middlesex TW 6RB - England +44 (0) Fax: +44 (0) This approval is in Accordance with Certificate number 8508 Issue 04 June 009 Twiflex 00. DS009 / Printed in USA

R to disc edge. Caliper Part Number Caliper Part Number for K and L Thrusters. Pad wear allowance

R to disc edge. Caliper Part Number Caliper Part Number for K and L Thrusters. Pad wear allowance MS Disc Brake Caliper DS1500 TWIFLEX MS 6.4 20.5 to disc edge 137 R22 2 Holes14 dia M12-87Nm) 12.7 1 76 135 2 121 Caliper Part Number. 6780277 Caliper Part Number. 6780842 for K and L Thrusters Weight