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QLA Series

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QLA Series DTH Drill Bits

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QL40A

Inch: 4″

QL50A

Inch: 5″

QL60A

Inch: 6″

QL80A

Inch: 8″

Technical Parameter

Head Shape Head Diameter（mm) Shank Length Spline Port holes Button qty.pcs*dia.mm Weight(kg)
Button Type（Optional） Gauge Buttons Front buttons
Convex Face 108 280 10 2 Spherical+Ballistic 7*φ16 6*φ14 9.42
Convex Face 115 280 10 2 Spherical+Ballistic 7*φ16 6*φ14 9.5
Convex Face 127 280 10 2 Spherical+Ballistic 8*φ16 4*φ14+3*φ13 10.7
Convex Face 130 280 10 2 Spherical+Ballistic 8*φ16 4*φ14+3*φ13 10.9
Head Shape Head Diameter（mm) Shank Length Spline Port holes Button qty.pcs*dia.mm Weight(kg)
Button Type（Optional） Gauge Buttons Front buttons
Concave Face 154 253 12 2 Spherical 8*φ18 4*φ16+4*φ15 22.5
Flat Face 165 253 12 2 Spherical 8*φ18 8*φ16 23
Concave Face 171 253 12 2 Spherical 8*φ18 6*φ16+4*φ15 24.4
Concave Face 178 253 12 2 Spherical 8*φ18 6*φ16+5*φ15 25.3
Concave Face 190 253 12 2 Spherical 9*φ18 6*φ16+5*φ15 26.5
Concave Face 203 253 12 2 Spherical 10*φ18 8*φ16+6*φ15 29.7
Head Shape Head Diameter（mm) Shank Length Spline Port holes Button qty.pcs*dia.mm Weight(kg)
Button Type（Optional） Gauge Buttons Front buttons
Concave Face 203 331 16 2 Spherical 10*φ18 4*φ18+10*φ16 48.2
Concave Face 216 331 16 2 Spherical 10*φ18 4*φ18+10*φ16 51.9
Concave Face 230 331 16 2 Spherical 12*φ18 12*φ18+6*φ16 54.7
Concave Face 235 331 16 2 Spherical 12*φ18 12*φ18+6*φ16 55.3
Concave Face 254 331 16 2 Spherical 12*φ18 12*φ18+8*φ16 62.2
Convex-Concave Face 275 331 16 2 Spherical 12*φ18 8*φ16+19*φ16 68.8
Convex-Concave Face 305 331 16 2 Spherical 15*φ18 12*φ16+23*φ16 77.3
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Email address

info@rockdrillmaster.com
sales@rockdrillmaster.com

Phone numbers

Mobile : +86 188 2419 8826

Our location

Pingjiang Industrial Park, Yueyang,
Hunan Province, China