A QL60 drill bit is a DTH (Down-The-Hole) hammer bit used for drilling large-diameter holes in hard rock formations. The "QL60" refers to the specific type of QL series DTH hammer it is designed to work with, which typically has a 6-inch shank. These bits are characterized by tungsten carbide buttons that break up rock through high-impact forces from the hammer, combined with rotation from the drill string.

Face Shape	Head Diameter (mm)	Shank Length	Spline	holes Qty	Button qty.pcs * Dia.(mm)			Weight (Kg)
Face Shape	Head Diameter (mm)	Shank Length	Spline	holes Qty	Button Type (Optional)	Gauge Buttons	Front buttons	Weight (Kg)
concave face	154	253	12	2	Dome	8*Φ18	4Φ16+4Φ15	22.5
Flat Face	165	253	12	2	Dome	8*Φ18	8*Φ16	23
concave face	171	253	12	2	Dome	8*Φ18	6Ø16+4Ø15	24.4
concave face	178	253	12	2	Dome	8*Φ18	6Φ16+5Φ15	25.3
concave face	190	253	12	3	Dome	9*Φ18	6Φ16+5Ø15	26.5
concave face	203	253	12	2	Dome	10*Φ18	8Ø16+6Ø15	29.7

Key features and functions

Purpose: Used for applications like mining, quarrying, water well drilling, and general construction where holes need to be drilled in hard rock.
Working principle: It functions with a DTH hammer, which is located directly behind the bit. The hammer delivers rapid, powerful impacts to the bit, while the drill string rotates it.
Construction: Typically made from high-quality carbon steel and features durable tungsten carbide buttons for wear resistance.
Shank type: The "QL60" shank signifies a 6-inch connection, and the bit is engineered to fit this specific hammer.
Hole size: The resulting hole diameter can vary, but QL60 bits are often used for drilling holes in the 155mm to 190mm (approximately 6 to 7.5 inches) range, depending on the specific bit model.
Customization: QL60 bits are available with different face designs (flat, concave, convex) and button configurations to optimize performance in various rock types and conditions.

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DTH Bits-QL60-165 for mining

Key features and functions