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op-End needle bearings are the key components in transmitting the engine’s explosive force from the crown of the piston to the rotating assembly below. Namura’s bearings are manufactured from SCM415 Chromoly Steel and treated using a process called carbonnitriding; this enhances the fatigue strength and heat dissipating capacity of the cage. The overall bearing structure and high rigidity allows them to withstand the significant stress levels created by varying/high RPM’s and the impact of an engine’s stroke.

Another key feature that our bearing assemblies have is a silver coated cage. Yes, the cage that holds our needle bearings is electroplated first with copper and then a second coating of silver to better resist the erosive materials it is exposed to. This coating also decreases the friction between the cage and the bearings allowing for longer assembly life and increased reliability.

PART NUMBER DESCRIPTION ID (MM) OD (MM) LENGTH (MM)
09-502-1 WRIST PIN BEARING 16 21 19.5
09-503-1 WRIST PIN BEARING 18 23 22
09-505-01 WRIST PIN BEARING 18 22 22
09-512-1 WRIST PIN BEARING 20 24 23.8
09-513-1 WRIST PIN BEARING 16 20 19.5
09-521-1 WRIST PIN BEARING 20 25 24
09-522-1 WRIST PIN BEARING 16 20 22.5
09-523-1 WRIST PIN BEARING 20 26 24
09-524-1 WRIST PIN BEARING 20 24 22.7
09-B000-1 WRIST PIN BEARING 12 16 15.8
09-B001-1 WRIST PIN BEARING 15 19 16.8
09-B002-1 WRIST PIN BEARING 18 23 23.8
09-B005 WRIST PIN BEARING 16 21 22.5
09-B005-1 WRIST PIN BEARING 16 21 22.5
09-B006-1 WRIST PIN BEARING 14 18 17.2
09-B012-1 WRIST PIN BEARING 14 18 15.8
09-B013-1 WRIST PIN BEARING 15 19 19.5
09-B015-1 WRIST PIN BEARING 12 17 14.2
09-B022-1 WRIST PIN BEARING 18 22 23.5
09-B023 WRIST PIN BEARING 20 25 24.8
09-B030-1 WRIST PIN BEARING 22 27 24.8
09-B031-1 WRIST PIN BEARING 20 25 22.8
09-B036-1 WRIST PIN BEARING 19 24 24.8
09-B037-1 WRIST PIN BEARING 18 22 19.8
09-B038-1 WRIST PIN BEARING 15 20 17.8
09-B039-1 WRIST PIN BEARING 20 25 21.8
09-B041 WRIST PIN BEARING 12 15 14.5
09-B042-2 WRIST PIN BEARING 12 15 16.3
09-B043-1 WRIST PIN BEARING 12 16 14.8
09-B074-1 WRIST PIN BEARING 20 27 22.8
09-B075-1 WRIST PIN BEARING 24 29 24.8
09-B081-1 WRIST PIN BEARING 21 25 23.8
09-B082-1 WRIST PIN BEARING 16 20 19.8
09-B410 WRIST PIN BEARING 10 14 12.5