An old machinist grabbed my arm at a yard sale in Detroit

I was looking at this beat up Bridgeport mill and this guy in his 70s came up and said 'that machine will outlive your grandkids if you don't abuse it.' He pointed at the worn handles and told me the secret is greasing the ways every 50 hours, not 100 like the manual says. He said he ran the same model for 35 years at a shop on Grand River and never replaced a single bearing. Has anyone else gotten random advice from a stranger that saved them money on a big purchase?

2 comments

2 Comments

kevinc841mo ago

Whoa hold on, I gotta push back on this a little. I mean sure, the old guy probably meant well but blindly following advice from some stranger at a yard sale is how you end up with problems down the road. That mill might have been his baby but the manual says 100 hours for a reason, engineers tested that stuff. Overgreasing can actually trap grit and make things worse over time, especially if you use the wrong grease. And saying he never replaced a bearing in 35 years sounds like a tall tale, maybe he just never checked them or ran it so light it never mattered. I'd rather trust the factory specs and a good maintenance log than some random guy's "secret" that could cost me a machine.

skyler_adams1mo ago

Got a buddy named Tony who does machine work on the side. He bought an old South Bend lathe off some retired guy's barn last year. The guy told him to always leave the belts loose when it's sitting, said tight belts wear the bearings out faster. Tony thought it was weird but tried it anyway. About six months later he found out that loose belt had slipped while he was turning some steel rod and put a nasty groove into the spindle. Now he keeps that thing tight as hell and just replaces the belt every couple years.