Search found 1101 matches

by John Hasler
Sun Mar 24, 2019 4:53 pm
Forum: Lathes
Topic: I bought a Lathe
Replies: 7
Views: 105

Re: I bought a Lathe

Looks interesting. I'd pay a couple of hundred for it. Convert it to DC motor drive, of course, if it isn't already there. Replace the leadscrew with a normal one and drive it with a DC motor with future plans for an electronic QCGB for threading. The second carriage is most of your tailstock with i...
by John Hasler
Tue Mar 19, 2019 7:28 am
Forum: Lathes
Topic: Odd runout on mini lathe
Replies: 26
Views: 538

Re: Odd runout on mini lathe

I don't think we can judge the condition of the bearings without seeing them after they've been cleaned up. I would think that there would be some visible distortion if he accidently yanked the cage off.

If the manufacturer is willing to take his word that it just fell apart so am I.
by John Hasler
Mon Mar 18, 2019 4:46 pm
Forum: Live Steam
Topic: Loctite
Replies: 9
Views: 714

Re: Loctite

Glyptal is ok for securing adjusting screws against vibration (but mostly serves to indicate that someone has messed with the adjustment) but it's a synthetic varnish, not an adhesive. It's a good electrical insulator, though.
by John Hasler
Sun Mar 17, 2019 1:48 pm
Forum: Live Steam
Topic: Loctite
Replies: 9
Views: 714

Re: Loctite

NASA considers Loctite a suitable locking feature. I'll go with that.
by John Hasler
Sat Mar 16, 2019 4:09 pm
Forum: Lathes
Topic: Capabilities of a 12" lathe
Replies: 13
Views: 396

Re: Capabilities of a 12" lathe

Don't hesitate to drill extra holes in a faceplate. I wouldn't worry about the weight since the part is radially symmetrical. A plywood disk pressed into the center is one way to damp vibration. Even a piece of 2x4 wedged in there can help. When I did the 8.5" base for my rotary table on my 9" Logan...
by John Hasler
Sat Mar 16, 2019 11:03 am
Forum: Lathes
Topic: Capabilities of a 12" lathe
Replies: 13
Views: 396

Re: Capabilities of a 12" lathe

Use a faceplate. Add features that you can drill for mounting holes if needed.
by John Hasler
Thu Mar 14, 2019 7:45 am
Forum: General Discussion
Topic: Removing metal splinters
Replies: 15
Views: 917

Re: Removing metal splinters

I use fingernail clippers. Often I can grip the splinter with it and pull it out. If not I use the clipper to remove enough tissue to expose enough of the splinter to grip. I find that this minimizes the size of the resulting wound. A "nice" feature of steel splinters is that they are tough enough t...
by John Hasler
Wed Mar 13, 2019 7:04 pm
Forum: Lathes
Topic: Odd runout on mini lathe
Replies: 26
Views: 538

Re: Odd runout on mini lathe

What the manufacturer says goes.
by John Hasler
Wed Mar 13, 2019 7:00 pm
Forum: Milling Machines
Topic: Need to make an accurate 8mm hole in brass plate
Replies: 18
Views: 414

Re: Need to make an accurate 8mm hole in brass plate

Using calipers to measure the actual holes may work depending on the diameter of the holes and the accuracy needed. The flat on many calipers prevents truly getting in the concave edge of a hole, so your measurement will be big on the small side and small on the big side. A better way when possible...
by John Hasler
Wed Mar 13, 2019 2:44 pm
Forum: General Discussion
Topic: CMM granite surface plate grade ?
Replies: 2
Views: 204

Re: CMM granite surface plate grade ?

You'll also be getting a bunch of super-high resolution encoders, bearings and other very expensive precision components. Can I interest you in selling what's left after you remove the table?
by John Hasler
Wed Mar 13, 2019 11:17 am
Forum: Lathes
Topic: Odd runout on mini lathe
Replies: 26
Views: 538

Re: Odd runout on mini lathe

Can you tell us what type of bearing it is? Photos? IIRC I've seen some where nothing prevented the rollers from falling out of the cage when it was off the inner race. These can be re-assembled as long as none of the rollers made good its escape (stick them in with assembly lube). Before assuming t...
by John Hasler
Wed Mar 13, 2019 8:53 am
Forum: Milling Machines
Topic: Need to make an accurate 8mm hole in brass plate
Replies: 18
Views: 414

Re: Need to make an accurate 8mm hole in brass plate

Glenn said,"If you want to determine the distance between two holes, measure between the inner two edges (with calipers if no other way) and then add the radius of each hole to find the center distance." I agree with this, but I often measure between the two inner edges, and then the two outer edge...