Gun Drilling Long Shafts and Hydraulic Rods: What I Watch For
Drilling a long shaft — say 1.5 meters of solid steel with a 10mm hole through the center — looks simple on paper. But it’s one of those jobs where the setup matters more than the cutting parameters. If you’re working on cylinder bores instead of solid shafts, I covered BTA drilling for hydraulic cylinders here. This one is about shafts. The shaft wants to whip. The drill wants to wander. Coolant has a long way to travel. Here’s how I deal with each. ...