基本尺寸			型号
			Model
d[mm]	D[mm]	B[mm]
25	32	20	HK2520
25	32	12	HK2512
28	35	16	HK2816
25	32	16	HK2516
28	35	20	HK2820
25	32	20	HK2520
30	37	12	HK3012
28	35	16	HK2816
30	37	16	HK3016
28	35	20	HK2820
30	37	20	HK3020
30	37	12	HK3012
35	42	12	HK3512
30	37	16	HK3016
35	42	12	BK3512
30	37	16	BK3016
35	42	20	BK3520
30	37	20	BK3020
40	47	12	BK4012
35	42	12	BK3512
40	47	20	BK4020
35	42	20	BK3520
45	52	20	BK4520
40	47	12	BK4012
50	58	20	BK5020
40	47	20	BK4020
55	63	20	BK5520
45	52	20	BK4520
60	68	20	BK6020
50	58	20	BK5020