Hex 22*108mm Tapered Hexagonal Drill Rod For Small Hole Drilling
Apr 16, 2025
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# Small Hole Hexagonal Drill Rod
# Tapered Hexagonal Drill Rod
# 22*108mm Hexagonal Drill Rod
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
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