High quality hollow drill bit for stone drilling
USD $5 - $50 /Piece
Min.Order:10 Pieces
Quanzhou Keen Diamond Tool Co., Ltd.
Quanzhou Keen Diamond Tool Co., Ltd is a professional and competitive manufacturer of kinds of diamond tools,
especially in the fields of diamond wires, diamond saw blades, diamond segments, diamond fickert abrasives and
hollow drill bits etc.
KEENTOOL offers different size of hollow drill bit for drilling granite, marble, concrete and wall.
With years of research and application of hollow drill bit, we are pride of being able to offer high performance
diamond bitsfor different drilling use.
Main features of hollow drill bit :
Diameter | Segment Dimensions | Segment Nos. | Length | Thread | Remarks | |
Inch | mm | |||||
1 | 25 | 16×3.3×10 | 3 | 300-500mm | 1-1/4"-7 UNC | Brazed/Laser welded |
1 1/4 | 32 | 16×3.3×10 | 4 | 300-500mm | 1-1/4"-7 UNC | |
1 1/2 | 38 | 20x3.3x10 | 4 | 300-500mm | 1-1/4"-7 UNC | |
1 3/4 | 44 | 20x3.5x10 | 5 | 300-500mm | 1-1/4"-7 UNC | |
2 | 51 | 20x3.5x10 | 6 | 300-500mm | 1-1/4"-7 UNC | |
2 1/2 | 64 | 20x3.5x10 | 8 | 300-500mm | 1-1/4"-7 UNC | |
3 | 76 | 20x3.5x10 | 9 | 300-500mm | 1-1/4"-7 UNC | |
3 1/2 | 89 | 20x3.5x10 | 10 | 300-500mm | 1-1/4"-7 UNC | |
4 | 102 | 20x3.8x10 | 12 | 300-500mm | 1-1/4"-7 UNC | |
4 1/2 | 114 | 20x4.2x10 | 13 | 300-500mm | 1-1/4"-7 UNC | |
5 | 127 | 20x4.2x10 | 15 | 300-500mm | 1-1/4"-7 UNC | |
5 1/2 | 140 | 24x4.2x10 | 14 | 300-500mm | 1-1/4"-7 UNC | |
6 | 152 | 24x4.5x10 | 15 | 300-500mm | 1-1/4"-7 UNC | |
7 | 178 | 24x4.5x10 | 17 | 300-500mm | 1-1/4"-7 UNC | |
8 | 203 | 24x4.5x10 | 18 | 300-500mm | 1-1/4"-7 UNC | |
9 | 229 | 24x5x10 | 19 | 300-500mm | 1-1/4"-7 UNC | |
10 | 254 | 24x5x10 | 20 | 300-500mm | 1-1/4"-7 UNC | |
12 | 305 | 24x5.5x10 | 20 | 300-500mm | 1-1/4"-7 UNC |
Remarks: Other specification is available as per customer’s requirement.
When order hollow drill bit , please kindly inform the followings:
1). Diameter of the core drill
2). Specification of segments for core drill bits
3). The length of the core drill
4). The size and types of screw of joint
5). For what drilling use(granite, marble, concrete etc)
6). Other special requirements ( if any)