For the very latest activity, click here: From a Bare Hull
Batteries Bilge Bilge Pumps Blog Bow Pulpit Bow Thruster Bulkheads Cabinets Cable Master Canvas Cockpit Construction Coosa Deck Deck Hardware Design Dinette Distributed Power Driveline Electrical Electronics Engine Engine Room Equipment Exterior Fiberglass Finish Work Floors Fuel System Fun Gadgets Galley Hard Dodger Head Heating and Air Conditioning Ice Box Ideas Insulation Interior Keel Lighting Main Salon Mastervolt Masts Materials Mechanical New Technologies Off Topic Paint Panel Philosophy PlasTeak Plumbing Portlights Ramblings Rigging Rudder Sailplan Sails Sanitation Steering Tanks Techniques The Other Boat The Shop Thru-hulls Tick Stick Tools V-Berth Welding Wiring Wood
Monday, June 22, 2009
Slow and Steady
Started doing some machining on the chainplates. We will be using flat head socket cap screws instead of carriage bolts. This requires cutting countersinks on the holes already cut by the jet cutter. We will be using LARGE cap head screws, which will require large countersinks (up to 1.25 inch head diameter). I managed to find a countersink bit that was just large enough to fit the chuck of our drill press (1/2 inch) and large enough for the cap head screws. The trick with cutting stainless is to go slow and steady. Keep the pressure constant. Not too hard, not to light. Watch the heat, dont let it get too hot. Use the slowest speed. Don't get startled by the screeching noises from the bit. Once the cut gets started, it tends to go nice and smooth as long as you keep a constant pressure. Now our drill press is not the most precise of machining tools, but it is good enough for this application. Many thanks to Colin for his tips on cutting stainless steel (see hs comments on the earlier post).