Email: sales@prodrill.com.cn
Tel:0086-18959243380
Addr: Room 805 C1 Wanda Plaza, No.5 Jinzhong Road, Huli District, Xiamen, China
Rubber Collar Drill Steels
- 1 : 22mm AF Hex Hollow Rubber Collar Drill Steels ( 11 degree Taper )
- 2 .Type : 11 degree Taper 22mm AF Hex Hollow Rubber Collar Drill Steels
- 3. Application : Underground mining such as Platinum mines, Gold Mines, Quarries surface such as Black Granit Quarries, Aggregate Stone Quarries.
Rock drilling tools Tapered Drill Rod is to provide a hexagonal chuck section to provide leverage for the rotation chuck bushing. It usually has a forged collar to maintain the proper shank striking face position in the rock drill, and a tapered drill bit end. Tapered steel lengths are measured from the collar to the bit end. Holes are usually drilled in 0.6 m increments to accommodate the air leg feed length. The drilled steel is extracted and followed with a slightly smaller diameter rock drill bit on the next steel length in the sequence.
Shank Hexagon: 19*108 mm, 22*108mm, 25*108 mm, 25*159 mm; 6, 7, 11, 12 degree taper in most lengths, taper degree of drill steel is mostly imports for excellent drilling productivity.
For drilling medium-hard to hard and abrasive rock formations, taper angles of 11 and 12-degrees are normally used on modern drill rigs, like our model no. PD-Y58 crawler hydraulic rock drill. Also for Y6, Y10, Y24, YT24, Mobile rock drills pneumatic and hydraulic. For low impact rock drills and softer rock formations, a narrow tape range of 7 degrees is used, such as Indian, Saudi’s granite and marble quarry. A comprehensive range of taper button bits, cross bits and chisel bits with 6, 7, 11, 12 degree taper, drill hole diameter: 28mm-57mm.
Rubber with coversteel collar Dimensions are OD 42.8mm, length is 75mm and H22 rubber insert liner. Outside is steel, thickness about 3.2mm.
Rubber length 75mm
Rubber OD 42.8mm
Rubber ID 22mm
Rubber thickness 3.2mm