H4 SERIES SERVICE BRAKE

The Carlisle Brake & Friction H4 Series Service Brake is a hydraulically applied, four-piston, caliper disc brake, designed for a variety of dynamic braking requirements. The H4 brake is typically mounted to a flange on the vehicle’s axle or mounting bracket for service brake applications.

Additional Product Details

Flexible mounting alternatives to accommodate numerous vehicle types
Constructed from ductile iron casting for superior brake durability
Equipped with Carlisle premium asbestos-free linings, providing superior stopping performance and life
Optional seal materials available for compatibility with all actuation fluids and temperatures
Open caliper provides easy access for visual inspection and serviceability
Optional flange configurations and mounting patterns available

Technical Specifications

Caliper Material	High-strength ductile iron
Disc Diameter Range	18.0 in to 20.0 in (457.2 mm to 508.0 mm)
Disc Thickness	0.5 in to 0.625 in (12.7 mm to 15.9 mm)
Displacement per Brake	0.5 in³ (9.0 cm³)
Lining Area per Brake	54 in² / 348.39 cm²
Lining Material	Carlisle premium asbestos-free
Maximum Pressure	1500 psi / 103.42 bar
Mounting Attitude	3, 9 o’clock
Number of Pistons	4
Final Assembly Weight	81 lbs / 36.74 kg

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Company Name
Contact
Address 1
Address 2
Phone (Optional)
Email Address
Vehicle Type
Vehicle Model Number
Approximate Annual Volume
Normal Brake Usage	Service Park/ Secondary
Brake Location	Wheel Drive Shaft
Actuation	Mechanical Hydraulic SAHR
Actuation Fluid	Automotive Brake Fluid Mineral Oil Air
Gross Vehicle Weight (W gross)
Empty Vehicle Weight (W empty)
Gear Reduction (Gear red)	All gear reduction between the brake location and the vehicle ground contact.
Total Resistance (R%)	2% standard unless otherwise specified.
Maximum Brake Pressure (Pmax)	Maximum pressure available at brake input.
Number of Braked Wheels (n wheel)
Tire Rolling Radius in inches: Static (Rstatic)	Dynamic (Rdvn)
Brake Clearance in inches: Rim I.D.
Hub O.D.
Disc Dimensions in inches: O.D.
Thickness
Grade Hold Requirement (Gstatic.%)
Maximum Level Surface Speed (Vmax)
Stop Distance Requirement (Sstop)
System Actuating Time Delay (tdelay)	0% will be used unless otherwise specified.
Dynamic Grade Requirement (Gdvn.%)
Ground Coefficient (µground)	0.5 is typical ground coefficient for unmaintained loose earth.
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