Search found 1605 matches

by liveaboard
Sun Dec 05, 2021 4:07 pm
Forum: General Discussion
Topic: Grub screws
Replies: 18
Views: 399

Re: Grub screws

Funny;
I was taught it by a Dutchman.
Old cranky machinist had a shop across the canal from my place.
by liveaboard
Sun Dec 05, 2021 2:38 pm
Forum: Lathes
Topic: Manual Lathe is Dead
Replies: 11
Views: 434

Re: Manual Lathe is Dead

Shopping for my mill, I saw tons and tons of good looking machine tools that had electronic problems. Like Richard pointed out, professional shops don't have time to waste on things that don't work. Very few home shop people can deal with cnc control problems on orphan machines. There are a hundred ...
by liveaboard
Sun Dec 05, 2021 2:26 pm
Forum: Milling Machines
Topic: Castor wheels for the mill
Replies: 42
Views: 3625

Re: Castor wheels for the mill

My compressor is 10 bar (150lbs) and as the pistons will be made from the castor hubs, they already exist. The pressure required to lift the mill (1.3 tons) is already calculated at around 30 bar (450 lbs). That already figures in that the front wheels will be considerably higher loaded than the rea...
by liveaboard
Sun Dec 05, 2021 2:14 pm
Forum: General Discussion
Topic: Grub screws
Replies: 18
Views: 399

Re: Grub screws

That looks like a beefy alternator; 80A or more? The torque is surprisingly high on that type of thing. I used to burn up V belts until I went to dual belts. I I suspect a grub screw will fail. A trick for people without the means to cut keyway grooves; Drill a hole along the shaft and hub, basicall...
by liveaboard
Sat Dec 04, 2021 4:54 pm
Forum: Milling Machines
Topic: Castor wheels for the mill
Replies: 42
Views: 3625

Re: Castor wheels for the mill

Yeah, I thought of that. They're CHEAP! But think about the tiny piston, it would take an hour to pump it up. And release would be difficult if it was grease. You can put oil in a grease gun, I have one with way oil in it for pushing into the fittings on my mill. But volume problem remains; and no P...
by liveaboard
Sat Dec 04, 2021 4:09 am
Forum: The Junk Drawer
Topic: Q: Trustworthy Source For Genuine Gillette Razor Blades ?
Replies: 16
Views: 373

Re: Q: Trustworthy Source For Genuine Gillette Razor Blades ?

I don't even buy Gillette from the supermarket here anymore. They're so bad, I concluded that they have to be fakes, or else Gillette has gone downhill so far it makes no difference. Usually, big retail is careful about their supply chain. If you want genuine products, you'll need to go to a retaile...
by liveaboard
Sat Dec 04, 2021 3:58 am
Forum: Milling Machines
Topic: Castor wheels for the mill
Replies: 42
Views: 3625

Re: Castor wheels for the mill

My idea is to build the pump from scratch. Bottle jacks run at around 600 bar (8500 psi), so their pumps have tiny volume. Since my design pressure is just 5% of that, a bigger volume pump will work better, and all it needs is a hole with an Oring groove, a rod on a pivoting stick, and a couple of c...
by liveaboard
Fri Dec 03, 2021 11:43 am
Forum: Milling Machines
Topic: Castor wheels for the mill
Replies: 42
Views: 3625

Re: Castor wheels for the mill

and expensive!
$100 +.
by liveaboard
Fri Dec 03, 2021 5:13 am
Forum: Milling Machines
Topic: Castor wheels for the mill
Replies: 42
Views: 3625

Re: Castor wheels for the mill

Thanks for that link, it's useful.

Yes, opposing shoulder stops. One side will presumably lift first.
I'll need a pump, PRV, release valve, reservoir, tubes, fittings...

Easy to do by spending money, not so easy to do on the cheap.
by liveaboard
Thu Dec 02, 2021 6:17 am
Forum: Milling Machines
Topic: Castor wheels for the mill
Replies: 42
Views: 3625

Re: Castor wheels for the mill

Today I'm leaning towards Bill's idea of hydraulic lift... To keep the cost low (very low), and because it's more fun this way, I'll make the cylinders and use the castor mounts themselves as the pistons. there are lots of details, none of which are too difficult but they add up to a lot of work. Th...
by liveaboard
Wed Dec 01, 2021 2:55 am
Forum: General Discussion
Topic: A topic for Glenn or Harold re: metrics
Replies: 136
Views: 16055

Re: A topic for Glenn or Harold re: metrics

I've not yet needed such an accurate thread. When I do, I'll have to figure it out. I don't have a 127 / 120 gear set, but (for instance) a 1mm thread calculates at 0.99888mm with the change gear set I have. (42/89, 40/80) I'm sure my worn out lead screw has more error than that. I've always used re...
by liveaboard
Tue Nov 30, 2021 11:20 am
Forum: General Discussion
Topic: A topic for Glenn or Harold re: metrics
Replies: 136
Views: 16055

Re: A topic for Glenn or Harold re: metrics

People sure do get emotional about this subject... I don't get it with the lathe lead screws; mine is (inexplicably) imperial and I cut lots of metric threads. And it's a cheap old lathe, way below what most of you are using. I have almost no imperial tools now. Or hardware. When it comes to trans-A...