The WF72K series four-jaw independent chucks are of cylindrical center mounting connected to the spindle nose by adaptors.
Size D		D1	D2	D3	H	H1	h	z-d
mm	inch
80	3	55	66	22	56	42	3.5	4-M6
100	4	75	88	25	73	55	5	4-M8
125	5	95	108	30	78	56	4.5
160	6	130	145	40	96.5	65	5	4-M10
160A		53	71	45
160T		65	95
200	8	125	104.8	50	110	75	6
200A		75	95	56
200K		80	112
250	10	100	120	65	117.5	82		4-M12
250A		110	130	75	115.5	80
300	12	152			128.5	85
320	13	140	165	95	134	90		4-M16
350	14	130	168	80	145	95	8
400	16	160	185	125	143
450	18	180	205	140	147	100
500	20	200	236	160	161	106		4-M20
630	25	220	258	180	180	115	10
800	32	250	300	210	210	135	12	8-M20
1000	40	320	370	260	250	150	15
1000A		285	330	280			75
1250	50	400	500	305	256	165	15