AB ST Rotary Bit 7, Bit

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Rotary Drilling relies upon high rotational speeds and thrust without percussion to achievethe desired effect and outputs. In rotary drilling, the rock is made to fracture by means of a combination of “pull down” pressure on the bit and rotational power “torque”. Weight is applied to gouge, chip and grind the rock. Tricone rotary bits are sometimes a good alternative to a DTH hammer.
• Available in TCI (carbide buttons) and mill tooth configurations.

Diameter (mm)	178
Diameter (in.)	7
IADC	111/231/321
Formation	Soft, Medium, Hard
Pin Size	3 ½” API Reg
Weight (kg)	16,5

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	Diameter	Diameter	IADC	Formation	Pin Size	Weight
Order code	mm	in.				kg
AB ST Rotary Bit 2 ½	64	2 ½	111/231/321	Soft, Medium, Hard	N Rod	1,7
AB ST Rotary Bit 2 ⅝	67	2 ⅝	111/231/321	Soft, Medium, Hard	N Rod	1,7
AB ST Rotary Bit 2 ⅞	73	2 ⅞	111/231/321	Soft, Medium, Hard	N Rod	2,0
AB ST Rotary Bit 2 15/16	75	2 15/16	111/231/321	Soft, Medium, Hard	N Rod	2,0
AB ST Rotary Bit 3	76	3	111/231/321	Soft, Medium, Hard	N Rod	2,0
AB ST Rotary Bit 3 ½	89	3 ½	111/231/321	Soft, Medium, Hard	2 ⅜” API Reg	3,1
AB ST Rotary Bit 3 ¾	95	3 ¾	111/231/321	Soft, Medium, Hard	2 ⅜” API Reg	3,7
AB ST Rotary Bit 3 ⅞	98	3 ⅞	111/231/321	Soft, Medium, Hard	2 ⅜” API Reg	3,7
AB ST Rotary Bit 4	101	4	111/231/321	Soft, Medium, Hard	2 ⅜” API Reg	3,8
AB ST Rotary Bit 4 ⅛	105	4 ⅛	111/231/321	Soft, Medium, Hard	2 ⅜” API Reg	4,2
AB ST Rotary Bit 4 ¼	108	4 ¼	111/231/321	Soft, Medium, Hard	2 ⅜” API Reg	4,2
AB ST Rotary Bit 4 ½	114	4 ½	111/231/321	Soft, Medium, Hard	2 ⅜” API Reg	4,2
AB ST Rotary Bit 4 ¾	121	4 ¾	111/231/321	Soft, Medium, Hard	2 ⅞” API Reg	7,3
AB ST Rotary Bit 4 ⅞	124	4 ⅞	111/231/321	Soft, Medium, Hard	2 ⅞” API Reg	6,6
AB ST Rotary Bit 5	127	5	111/231/321	Soft, Medium, Hard	2 ⅞” API Reg	6,8
AB ST Rotary Bit 5 ⅛	130	5 ⅛	111/231/321	Soft, Medium, Hard	2 ⅞” API Reg	8,5
AB ST Rotary Bit 5 ¼	133	5 ¼	111/231/321	Soft, Medium, Hard	2 ⅞” API Reg	8,5
AB ST Rotary Bit 5 ⅜	137	5 ⅜	111/231/321	Soft, Medium, Hard	2 ⅞” API Reg	8,5
AB ST Rotary Bit 5 ½	140	5 ½	111/231/321	Soft, Medium, Hard	2 ⅞” API Reg	9,2
AB ST Rotary Bit 5 ⅝	143	5 ⅝	111/231/321	Soft, Medium, Hard	3 ½” API Reg	9,2
AB ST Rotary Bit 5 ⅞	149	5 ⅞	111/231/321	Soft, Medium, Hard	3 ½” API Reg	13,7
AB ST Rotary Bit 6	152	6	111/231/321	Soft, Medium, Hard	3 ½” API Reg	13,7
AB ST Rotary Bit 6 ⅛	156	6 ⅛	111/231/321	Soft, Medium, Hard	3 ½” API Reg	13,7
AB ST Rotary Bit 6 ¼	159	6 ¼	311/111	Soft, Hard	3 ½” API Reg	14,8
AB ST Rotary Bit 6 ½	165	6 ½	111/231/321	Soft, Medium, Hard	3 ½” API Reg	16,5
AB ST Rotary Bit 6 ¾	171	6 ¾	111/231/321	Soft, Medium, Hard	3 ½” API Reg	16,5
AB ST Rotary Bit 7 ½	191	7 ½	111/231/321	Soft, Medium, Hard	4 ½” API Reg	22,0
AB ST Rotary Bit 7 ⅝	194	7 ⅝	111/231/321	Soft, Medium, Hard	4 ½” API Reg	22,0
AB ST Rotary Bit 7 ⅞	200	7 ⅞	111/231/321	Soft, Medium, Hard	4 ½” API Reg	22,0
AB ST Rotary Bit 8	203	8	111/231/321	Soft, Medium, Hard	4 ½” API Reg	23,0
AB ST Rotary Bit 8 ½	216	8 ½	111/231/321	Soft, Medium, Hard	4 ½” API Reg	32,0
AB ST Rotary Bit 9 ½	241	9 ½	111/231/321	Soft, Medium, Hard	4 ½” API Reg	32,0
AB ST Rotary Bit 9 ⅞	251	9 ⅞	111/231/321	Soft, Medium, Hard	6 ⅝” API Reg	46,0
AB ST Rotary Bit 10	254	10	321	Hard	6 ⅝” API Reg	46,0
AB ST Rotary Bit 12 ¼	311	12 ¼	111/231/321	Soft, Medium, Hard	6 ⅝” API Reg	78,0