Dinnu
Member Since: 24 Dec 2019
Location: Lija
Posts: 3428
 
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Late to reply, but in case any one needs to drill high tensile bolts, on a hand driller, then go for Cobalt drills. They can drill in 12.9 grade bolts, no problem. If you can take the part to a press drill, then go for carbide drills. Carbide drills are the hardest, followed by Cobalt and then HighSpeed Steel. The harder is the drill, the less ductile, or flexible it is, hence it is difficult to drill with Carbide drills on a hand driller without breaking it. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
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11th May 2020 7:00pm |
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