Dormer A170 系列 13.5mm直径 高速钢 钻头 A170-13,50, 118°尖, 1/2in长 渐缩平行杆, 156 mm总长

HSS plain stem drill bits with ? 12.7 mm A170

Series of HSS plain stem drill bits of diameter 12.7 mm at a normal helix of 30° and sharpening of 118°.
These drill bits are for general piercing of steel, cast iron, etc.
The reduced stem of 12.7 mm allows work with machinery equipped with spindles with a maximal capacity of 13 mm (1//2").