MRH-5A Ring Block Wear Tester + Timken testing machine The MRH-5A Ring Block Wear Tester + Timken testing machine is a high-precision instrument that is essential for testing the extreme compression and anti-confusion capacity of various lubricants and greases. In addition, it is also ideal for studying the anti-friction capacity of aviation kerosene, coatings, and metal and non-metal materials. This …