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AssigneesNsk Ltd., Takai Seiki Co., Ltd.
InventorsHironori SUZUKI, Yamato OKAZAKI, Ryohei TAKAYAMA
Estimating the term…
A resin cage includes at least one annular portion, a plurality of column portions each extending from the annular portion in an axial direction and provided at equal intervals in a circumferential direction, and pockets formed between adjacent column portions. The annular portion has a guide surface that is guided by an inner circumferential surface of an outer ring or an outer circumferential surface of an inner ring, and a gate G for injection-molding the resin cage is provided on an inner circumferential surface of all the column portions, and is displaced in the circumferential direction from a circumferential center position of each column portion. The gate is provided within a range where an inner ring raceway groove is formed in the axial direction, or within a range where the inner ring raceway groove and a counterbore of the inner ring are formed.
A resin cage for a ball bearing, the resin cage comprising:
A method for manufacturing a resin cage for a rolling bearing, the resin cage comprising at least one annular portion, and a plurality of column portions each extending from the annular portion in an axial direction and provided at equal intervals in a circumferential direction, wherein the resin cage for the ball bearing can rotatably hold balls of the ball bearing in pockets formed between adjacent column portions, the annular portion has a guide surface that is guided by an inner circumferential surface of an outer ring or an outer circumferential surface of an inner ring of the ball bearing,
Dependencies are inferred from the claim text.