High Thermal Engaging (HTE) has the thermal capacity of Kevlar®, with improved consistency and shudder resistance for today's demanding applications.

HTE Friction Ring
  • Dark gray
  • .045" or .066" Thickness
  • Replacement for Tan or Kevlar material.

High Thermal Lockup (HTL) has high thermal and exceptional torque capacity required for the most demanding torque-holding applications.

HTL Friction Ring
  • Khaki
  • .066" Thickness

Extreme Torque Lockup (XTL) provides 30% more torque holding capacity than HTL and is only for extreme duty lockup applications.

XTL Friction Ring
  • Dark gray/green
  • .050" Thickness
  • Only available in a few sizes for severe applications

High Thermal Slipping (HTS) is designed for slipping applications which require high thermal capacity, and is the benchmark for consistency, durability and shudder resistance.

HTS Friction Ring
  • Gray/green
  • .045" or .066" Thickness
  • Replacement for spun-wound, woven or other carbon based materials.
Puzzle Piece encircled by friction ring
Solid vs Segmented RingsThere are two ways to make a friction ring. You can cut a solid ring out of sheet of friction material, or you can cut smaller segments of the circle out of the material sheet and create a segmented ring. The puzzle lock on the segmented ring allows it to be assembled and held together until it is positioned for bonding.
Comparison of amound of friction material wastedBorgWarner provides world-class friction material with a highly developed process that demands only prime, premium raw materials. To produce this kind of quality at a competitive price, every attempt is made to reduce waste. Creating segmented/puzzle lock rings utilizes more friction material and produces less waste than solid rings.
No. The puzzle lock joint has no effect on bonding. As with any bonding process, the surface prep and bonding adhesive quality are the foundation of a good bond. The critical application of heat and pressure are steps which must be followed to complete the process. The puzzle lock merely holds the ring together, allowing you to position it for bonding. Like any ring, proper storage (laid flat in a clean, protected environment) prior to bonding plays an important role in bonding.
Segmenting or “puzzle joint” friction material emerged in the late 1980’s and is now the standard for most OE manufacturers. The puzzle lock feature is trusted technology found in millions of vehicles driven hundreds of millions of miles. Its ability to last is unquestioned. Today, segmented ring technology has progressed so far that multi-segmented frictions are common.
Pattern of multi-segmented frictionsCut-out pattern on segmented ring

These rings can be a pattern of cut-out sections of what is – in effect – a circular ring, or simply a pattern of small segments applied to a plate surface.

Multi-segmented designs take friction rings to the next level. A solid ring surface has limitations both in oil flow potential during release and oil displacement at the time of apply. Combined with cutting-edge friction materials, multi-segmented rings deliver improved performance and reduced drag for improved fuel economy. BorgWarner is a leader in this emerging technology that is gaining increasing use throughout the industry.

No worries.

You have likely already driven a vehicle using multi-segmented friction technology. Do you worry about driving around on a friction plate like the one shown above?

Of course not. It's made by the same folks who brought you this:

BorgWarner friction ring

BorgWarner friction rings for aftermarket and remanufacturing are produced by the same team, equipment and processes used for OE manufacturers. BorgWarner provides world-class friction materials by using only prime premium raw materials and continually investing in process, process controls and product research.

The cost to produce friction materials to such exacting standards is higher than that of most aftermarket producers with less-demanding standards. Offering this premium performance material at an acceptable market price has led BorgWarner to develop industry-leading manufacturing techniques to minimize material waste through segmenting and multi-segmenting technologies. In addition to conserving material, this process allows end users to get a premium friction material at a competitive price when compared to most full- or solid-ring facings sold in the aftermarket.

Tech Resources

Puzzle Piece encircled by friction ring

Exclusively from Sonnax

New! Woven Carbon Friction Rings

  • Genuine OE Material
  • Affordable & Durable
  • Easy to Bond
View all woven carbon friction rings

Available to the aftermarket for the first time, genuine OE woven carbon material helps you build outstanding performance and durability into the following applications:

  • 4L30-E
  • 4T60
  • 4T65-E
  • 4L60/65/70-E
  • 5L40/50-E
  • 6T40/45/50-E
  • 6F35
  • 6T70/75-E
  • 6F50/55
  • 6L45/50-E
  • 6L80/90-E

Bonding Pressure Calculator

Enter the details of your bonder's ram/piston and the friction ring you are bonding into the calculator here to find the piston pressure required to create the desired pressure at the ring.


Bonding Pressure Diagram

Storage Tips

  • Always store rings flat – do not hang them up.
  • Rings should be stored with factory separator linings up against the adhesive side of the rings.
  • Covered/enclosed storage in a drawer cabinet, away from the shop, is the ideal arrangement.
  • At a minimum, rings should be sealed in plastic or poly material to protect them from dust and contamination.
  • Avoid exposure to temperature and humidity extremes.