Main oil seal (thickness: Japanese standard)

1. Ordinary model: P6000 (MDI caprolactone) (Parker p6000 material formula improved, K grade), the main oil seal material of other manufacturers in the market is basically P6000; high temperature resistance 110°, limit temperature 120°; (cost 16w/ton , lower loss rate)

2. High elastic and upgraded models: PPDI (polyurethane), the material used in military missiles; high temperature resistance 150°, limit temperature 170°; its resilience is 30% higher than that of P6000 material, and its wear resistance is also twice that of P6000 material ; (The cost is 60w/ton, the loss rate in the manufacturing process is 30%--50%, the larger the model, the higher the loss rate); the hardness of the Boris main oil seal is 96° which is the highest hardness standard, but it feels softer; The hardness of other oil seals on the top is basically 95°, and it feels hard); Dirk 230 main oil seal Boris, Dirk double standard.