FORMULATION (SR20)

SR20 is an Asbestos based flexible moulded non-metallic friction material having a random fibre asbestos base. It has medium coefficient of friction combined with high degree of flexibilitiy and adequate physical strength. SR20 is silent in operation, has good resistance to both fade and wear and is particularly suitable for bonding purposes.

Applications

SR20 is recommended for use in medium to heavy duty brakes of passenger cars & light commercial vehicles and for all industrial/off highway brake applications.

Technical Data

Friction
Friction Rating (As per SAE J661 a) : FF

Physical Properties
Specific Gravity : 1.95-2.00
Shear Strength : 7 N/mm²
Working Pressure : 1.2 N/mm²
Max. Rubbing Speed : 25 m/s

Recommended Peak Working Conditions

Continuous Temperature : 150°C
Transient Temperature : 315°C

Bonding

SR20 may be bonded with any of the established bonding adhesives although for best results thermosetting adhesives should be used. SR20 is supplied ground on both surfaces and may be bonded on either side as required.

Recommended Mating Surface

For best performance use good quality, fine grained pearlitic cast iron or forged/cold rolled steel as mating surface with a brinell hardness of 200-230. Cast steel is not suitable as a mating surface.

Size Range

Width : 25 mm - 180 mm
Thickness : 4 mm - 12 mm
Length : Upto 8 mm thickness 10 Metres
Over 8 mm thickness 5 Metres