| Button Bit Designs | |
| Skirt Designs | Straight skirt |
| Retrac skirt | |
| Face Designs | Flat Face |
| Drop Center Face | |
| Dome Face | |
| Thread form | Thread type |
| Rope thread | R25 |
| R28 | |
| R32 | |
| R35 | |
| R38 |
| Thread form | Thread type |
| T thread | T38 |
| T45 | |
| T51 | |
| ST thread | ST58 |
| ST68 | |
| GT thread | GT60 |
Spherical
Spherical Carbides for use in medium to hard rock, with fractured or seamy applications.
Paraboloid
Semi-ballistic shaped, more aggressive than the Spherical Carbides, for soft to medium consistent rock.
Ballistic
Bullet shaped, very aggressive fast penetration in soft to medium consistent rock.
| SIZE OF BUTTONS | ||
| Hard Rock | Medium Rock | Soft Rock |
| Larger Ø | Smaller Ø | Smaller Ø |
Note: Generally, the larger the number of gauge buttons the better overall performance, especially in hard rock.
All bit diameters are larger than the given dimensions in the catalog.
Cross bits: Can be a maximum of +1 mm due to manufacturing tolerance.
Button bits: Some bit designs can be a maximum +3 mm to compensate for fast diameter wear.
The minimum diameter for all button bits is +1.5 mm above the given dimensions.
Drill bit always drills a bigger hole than the stated bit diameter.
| Rod types | Round Rods | Round 32mm |
| Round 39mm | ||
| Round 46mm | ||
| Round 52mm | ||
| Round 60mm | ||
| Hexagon Rods | Hex.22mm | |
| Hex.25mm | ||
| Hex.28mm | ||
| Hex.32mm | ||
| Hex.35mm |
Round Rods
• Normally used in extension drilling applications
• Generally lighter than hexagonal rods of an equivalent size
• Available in large x-sectional diameters
• Diameter of rod is based on external dimension
Hexagon Rods
• The cross sectional dimension of material is measured across the flat.
• Cross sections are more rigid, heavier & transfer energy more efficiently.
• Reduces the annulus in the drill hole for better flushing.
• Smaller space combined with the corners of the steel create turbulence in the hole, keeps the heavier cuttings moving, especially with horizontal holes.
• The rigidity of the cross section makes it possible to use a larger thread.
Carburization
• Entire rod is hardened providing a case over the entire rod surface both internal and external.
• Primarily used in underground applications and where water is used as a flushing medium.
High Frequency (H/F) Induction
• Only the thread ends of the rod are hardened
• Primarily used in surface drilling applications where air is the primary flushing medium.
