Tapered Chisel Horse Rock Drill Bits for Hard Stone Pneumatic Drilling Product Information -Name: Tapered Chisel Bits for quarrying, mining, tunneling -Brand Name: KAIYU -Diameter: 28/30/32/34/36/38/40/42/43/44/46/48/50mm -Material: 42CrMo -Taper Degree: 4°,7°,11°. -Rod Shank: Hex19*108, hex 22*108 -Machine: Rock Drill, Jack Hammer -Color: Golden, Red, Blue etc -Packaging: Wooden Case -Delivery: 3-15days -Certification: ISO9001 -Place of Origin: Taizhou, Zhejiang,China(Mainland) -Use: Drilling Tools -Application: Used for Granite and marble quarry, gold mine, railway, tunnel etc. Product Description Tapered equipment affords drillers the ability to change drilling bits whilst still using the same drilling tools. Drillers choose tapered cross type bits if the goal is to minimize hole deviation in small hoe range drilling. Different taper sizes have different characteristics when it comes to the "knock-off" index - the smaller angle will prevent the bit from spinning. Used in drifting and tunneling. Tapered Chisel bits Description Diameter（mm） Length (mm) Water hole Weight approx (kgs) Taper degree a=4°, 7°, 11° Inner hole diameter d=19mm, 22mm, 24mm 28 60 2 0.18 30 60 2 0.19 32 63, 70 2 0.2 34 65 2 0.25 36 62 ,64, 80 2 0.28,0.35 38 65 2 0.31 40 69 2 0.33 42 67 2 0.35 43 75 2 0.48 44 75 2 0.5 46 80 2 0.55 Package: Wooden case
