Khe hở hướng kính của vòng bi:
https://file.hstatic.net/200000275109/file/khe_ho_huong_kinh_vong_bi_c583d7df3989422b88f7c0c5749a03e3.pdf
https://file.hstatic.net/200000275109/file/bang_khe_ho_vong_bi_tiep_xuc_4_diem._f65176075607486685a71876a7d58ddf.pdf
https://file.hstatic.net/200000275109/file/bang_khe_ho_vong_bi_cau._f8ae576818624efda7ae659002691cda.pdf
https://file.hstatic.net/200000275109/file/bang_khe_ho_vong_bi_kim_bc4897b3db94433d82d84c18aa487400.pdf
https://file.hstatic.net/200000275109/file/bang_khe_ho_vong_bi_dua._ea279cde78dc4babb9e044c700ddf5b7.pdf