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HF (needle clutch): by pressing the outer ring and plastic cage composition; plastic cage can be built on the stainless steel reed reed can also guide the needle, the bevel on the outer ring raceway and the needle as a locking device. HFL (clutch and bearing assembly): bearing needle roller bearings mounted on both sides of the clutch and radial load, as is the supporting bearing cage needle and plastic components. Material: ST14 generally low-carbon steel shell (stainless steel can be used for special occasions); example: HF2016 is widely used one-way bearings in a washing machine! The outer cover , generally for the low carbon steel of ST14 (special occasion can adopt the stainless steel ); Keep the shelf usually strengthening nylon; The needle is a bearing steel to roll , produce according to the needs of customer too. Customize according to the needs of customer