Drill & Blast / Tooling
Bits
Overview
Boart Longyear bits are optimized for drilling results in challenging ground conditions. Each design strikes a balance of flushing, gauge- and face-button wear, life, and rate-of-penetration.
• Convex for higher penetration rates.
• Concave for straighter holes.
• Flat for easy sharpening and maintenance.
Diameters range from 110 to 190 mm (4.3 to 7.5 inches)
Face Geometry
Dome
Soft to medium hard rock high penetration rate.
Concave
Broken ground conditions Straight hole applications
Flat
Medium to hard rock; Abrasive ground; General purpose bit
Features
QL/QLX 12-spline shanks. Make the switch to the most solid and wear-resistant in the market.
Bits for the BT hammers 100% without foot valves. Maximizes reliability by eliminating a plastic weakness. 5” and 6” bits provided with an optional foot valve to fit traditional tubed hammers.
Fine-tuned hardness and toughness to increase carbide life. Supports multiple re-sharpenings to amplify bit life. Choose between ballistic and hemispherical inserts.
Features
4" DTH Bits
| Part # | Shank Type | Diameter | Buttons | Flushing Holes | Carbide Profile | Face Profile | |
|---|---|---|---|---|---|---|---|
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |
5" DTH Bits
| Part # | Shank Type | Diameter | Buttons | Flushing Holes | Carbide Profile | Face Profile | |
|---|---|---|---|---|---|---|---|
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |
6" DTH Bits
| Part # | Shank Type | Diameter | Buttons | Flushing Holes | Carbide Profile | Face Profile | |
|---|---|---|---|---|---|---|---|
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |
|
920623 |
QLX4T/TD40 |
110 mm |
4-3/8 in |
8 x 14 |
2 |
Spherical |
Flat |