1 Level
765 Review
43 Karma
Review on Titanium Nitride Coated Drill Piece by Marcus Zimmerly
Scrap, don't buy, I'll send mine back.
Absolute rubbish. Doesn't cut steel at all. Bought to drill out a broken bolt deep below the surface. In preparation, I drilled a pilot hole with a conventional drill and filled it with cooling lubricant - a great thing, by the way. Throw the left drill 3/8 and set the drill backwards. It moved slowly and with a lot of pressure on the drill and hardly made any chips.
Pros
- Twist drill
Cons
- Expensive
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