NB250-FF High-Performance Brake Linings

Description

NB250-FF high-performance brake linings feature a heavyweight formula for rough-going, demanding off-the-road applications. This exclusive, high-density semi-metallic friction formula resists foreign particle impregnation from dust, dirt, and grit, and assures friction even in high braking temperatures. Protects drums, provides longer life and guards other components against excess heat.

NB250-FF passes the inertia dynamometer requirement of the FMVSS 121 brake standard at a 23,000 lb. GAWR when using an AL factor of 180 (type 30 air chamber and 6″ slack adjuster) or greater.

NB250-FF blends special steel wool fiber with aramid fibers to produce a block for the most difficult loads and terrain.

Application

Recommended for use on trucks, tractors, and trailers in all applications including general cargo, stop and go urban driving, bus, grain, liquid hauling, dump trucks and lowboys. Also designed for hydraulic cam brakes and air operated steel axles.

Gogan Hardness

31.7 GC
Nondestructive method of measuring a lining’s compressibility. Used as a quality control check of the consistency of formulation and processing of brake lining (SAE J379a).

Specific Gravity

2.65
Nondestructive test used as a quality control check of the consistency of formulation and processing of brake lining (SAE J380).

Tensile Strength

8710 PSI
Method of evaluating physical strength of brake lining (ASTM D952). Force required to break a sample 1.0 x 1.0 inch.

Temp Range

800 °F

Procedure

Typical Inertia Dynamometer Plot Test Parameters – FMVSS 121 Brake Standard

Brake – 16.5″ x 7″ Meritor S-Cam
AL Factor – 180
Axle Load – 23,000 lbs.
Rolling Radius – 20.7″
Drum Weight – 120 lbs.

Legend

Retardation Force
Minimum Required Retardation
Temperature (F)
Pressure

NB250 Spec Sheet

Brake Interchange Comparison Chart

Core ID Chart

NB250-FF High-Performance Brake Linings