advantage: 1). expedient drilling speed 2). optimum tootage 3). stable drilling 4). good quantity drilling holes

advantage:1). expedient drilling speed2). optimum tootage3). stable drilling4). good quantity drilling holes 

More Specifications, for stone and concrete separately

Diamond Drill bit
Outer diameter		Working length		Segment height		Thread
inch	mm	inch	mm	inch	mm
0.24	6	1.97	50	0.39	10	G1/2", 5/8"-11
0.31	8	2.36	60
0.39	10
0.47	12
0.55	14
0.63	16
0.71	18
0.79	20

Diamond Core Drill
Out Diameter		Working Length		Segment Hight
(mm)	(inch)	(mm)	(inch)	(mm)	(inch)
25	0.98	60	2.36	8	0.31
30	1.18	60	2.36	8	0.31
35	1.38	60	2.36	8	0.31
40	1.57	60	2.36	8	0.31
45	1.77	60	2.36	8	0.31
50	1.97	60	2.36	8	0.31
55	2.17	60	2.36	8	0.31
60	2.36	60	2.36	8	0.31
70	2.76	60	2.36	8	0.31
75	2.95	60	2.36	8	0.31
For drilling stones, concrete and brick walls, etc.

Big diameter core drill with more working length:

Diameter (mm)	working length 1 (mm)	working length 2 (mm)	working length 3 (mm)	segment height (mm)	connections
82	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
92	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
100	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
112	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
122	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
127	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
152	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
178	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
200	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
225	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
252	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
300	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
305	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
352	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
400	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
450	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
505	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
550	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16
600	360	400	450	10	1-1/4",5/8-11" G1/2" M14 M16

 customized specification is available.

Dia.76mm segmented diamond core drill 360mm working length with M14 connection for concrete