PDC concave drill bits
the cutters made of Polycrystalline Diamond Compact with perfect durability and high drilling speed;
the breaking post made of YG11 alloy as it's substrate, with high torsional strength and can break rock together with the cutters;
the gauge is made of YG8C alloy with perfect wear resistance. It can protect the bit from shrinking during the drilling process;
the size of the nozzles is 8mm~14mm. It can discharge debris at the same time cooling the cutter by using drill fluid;
PDC 3wing concave drill bit
Normal Type: Suitable for the formation of f< 8;
Reinforced Type: Suitable for the formation of f< 12;
PDC 4wing concave drill bit
Normal Type: Suitable for the formation of f< 10;
Reinforced Type: Suitable for the formation of f< 15.

Parameter PDC 3wing concave drill bits
Type	Dia(mm)	Height(mm)	Breaking Post Num	Wing Num	Nozzle Num	Nozzle Dia(mm)
Normal Type Reinforced Type	60	120	2	3	5	6
	75	120	2	6	5	8
	94	125	2	6	5	8
	113	130	2	9	5	10
	133	140	3	9	5	10

Type	Dia(mm)	Height(mm)	Breaking Post Num	Wing Num	Nozzle Num	Nozzle Dia(mm)
Normal Type Reinforced Type	75	120	2	8	6	8~10
	94	125	2	8	6	8~12
	113	130	2	12	6	10~12
	133	140	3	12	6	10~12