Top Hammer Drilling Tools

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

• 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

• 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.

• 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.

• Only the thread ends of the rod are hardened
• Primarily used in surface drilling applications where air is the primary flushing medium.

JINQUAN ROCK DRILLING TOOLS
JINQUAN BUTTON BITS

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