1.Higher quality
2. Strict quality control
3. More reasonable price
4. Better after-sales service
5. Professional suggestion

Hex shank drill punch drill rod /Small hole diameter taper drill rod for blast

Product Description

Different rock formations and rock drills require different taper angles. When drilling with high impact hydraulic rock drills in medium-hard to hard and abrasive rock formations, a wide taper angle is normally used. Taper angles of 11 and 12-degrees are normally used on modern drill rigs. For low impact rock drills and softer rock formations, a narrow taper angle of seven degrees is used. A 7-degree angle can also be used if bit spinning is a problem when using 11 and 12-degree equipment. In addition, a 4, 46 degree angle is ideal for soft rock when you're using pneumatic or hydraulic drill rigs - to prevent bits from spinning or becoming detached

12 Degree Rock Drill Tools (Shank 22 mm X 108 mm)

About products we can provide:

1. Integral drill steels (Integral Drill Rods)
Shank H22x108mm, H19x108mm, standard hex. Bit diameters include 20-42mm.
2. Tapered drilling tools (Tapered Drill Steel)
Including:
Shank H22x 108mm, (6, 7, 11, 12 degree taper) taper rods in most lengths.
A comprehensive range of button bits, cross bits and chisel bits with (6, 7, 11, 12 degree taper).
Bit diameter: 28mm-57mm.
3. Extension drilling tools
Button bit, face design: Flat face, drop centre, Normal and Retrac body.
Tungsten carbide (Buttons): Spherical, ballistic and Conical. (Threaded R32, R38, T38, T45, T51, bit diameter: 45mm-127mm);
Couplings sleeves- manufactured with a middle stop to prevent walking along the thread. Include couplings sleeve (threaded R22, R25, R28, R32, R38, T38, T45, T51)
Shank adaptors - carburized and manufactured with tight tolerances and controlled straightness.
4. Down the hole hammers and DTH bits (Down The Hole Drilling)
Offer IR hammer, DHD3.5, DHD340a, DHD360, DHD380, and low pressure hammers CIR65a, CIR90, CIR110, CIR150, CIR170 etc. DTH bits: 60mm-254mm bits with flat face, concave design fit for the atlas copco and ingersoll-rand model etc.
5. Excavate coal cutter bits
Include all kinds of round cutter bit and flat cutter bits for excavate coal machine as the replacements of kennametal. Such as U76, U82, U84, U85, U92, U94, U95, U118 and coal bolting bit and coal bolting rod.
6. All kinds of casing bits for shield machine and construction tools.
7. Round road planning bit for road milling machine and machine.
Shank diameter=19.4mm, 25mm, 30mm, 33mm, 38mm, etc.
8. Blast furnace tap hole drill tools. (Rod, Cross bits, button bits and X-type bits etc). 

Welcome To Contact Us If You Need Any of Our Tools!
E-mail us: chinadrillingtool.net@gmail.com