Wet Friction Product Specifications* Braketex® P-42

Description: 100% KEVLAR® fiber composite material is a non-molded and non-paper, textile-reinforced polymer containing no asbestos. Offers improved performance for all wet clutch and brake applications, featuring dramatically higher energy threshold to failure. Available bonded to carrier plates.

Physical and Mechanical Properties
Operating Conditions
Approximate Wet Friction Properties

Physical and Mechanical Properties

  • Composition: 100% long KEVLAR® fibers and proprietary polymer binders feature higher temperature resistance than phenolics. Includes no metal, no abrasives, no cotton, and no fillers.
  • Density: 0.88 g/cu. cm (0.032 lb./cu.in.)
  • Shock resistance: Excellent (does not crack, chips, or break)
  • Abrasiveness: Non-abrasive to opposing surfaces
  • Porosity: Unique "open, continuous-pore'' structure (characteristic of proprietary textile-reinforced composite production process)

Operating Conditions

  • Static pressure: As limited by bond and carrier plate
  • Dynamic pressure: 140 - 2760 kPa (20-400 p.s.i.) Upper limit not yet determined
  • Oil Bath Temperature: Ambient to 150° C (300° F) in automatic transmissionfluid. Ambient to 205° C (400° F) in silicone oil
  • Lubricant/Coolant: No known limitations. Resists ethylene glycol
  • Opposing surface: No fine finishing required, runs against steel, iron, stainless steel, copper, hard aluminum

Surface speed, temperature, and pressure are interdependent energy parameters. Values represent typical conditions and are not the ultimate limits of the material. Burnish time to achieve full mating surface contact can be three to five times that of conventional materials.

Approximate Wet Friction Properties
- in automatic transmission fluid (after extended burnish)

  • Wear rate: 1/2 to 1/5 that of organics and paper, 1/2 to 1/3 that of sintered bronze materials
  • Dynamic coefficient of friction: 0.10 to 0.15 µ in the 23 - 290 W/sq. cm range (0.2 - 2.5 HP/sq. in.). Approximately 10% higher than paper, maintaining coefficient beyond the energy limits of sintered bronze
  • Static to dynamic ratio: 1.05 - 1.15

*All values shown are approximations derived from a variety of tests and field applications. No warranty or implied liability assumed herein. Friction values shown are for guide purposes only, as actual values can deviate with individual design and operating conditions.

Developed and manufactured exclusively by:
Tribco, Inc.
18901 Cranwood Pkwy; Cleveland, OH 44128; USA
Phone Sales at 216.486.2000 or fax 216.486.2099
E-mail sales@tribco.com

Not available for consumer highway brake applications

We stock replacement parts for original equipment applications.
We will also reline any metal shoe or plate or will fabricate to order.

Braketex® and Clutchtex® are registered trademarks of Tribco, Inc. of Cleveland, Ohio, USA.
No warranty or implied liability assumed herein. Patented. ©2001 Tribco, Inc. All rights reserved.
Our lining is made with DuPont™ KEVLAR® brand fiber.
DuPont™ and KEVLAR® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company.