Search found 19007 matches

by Harold_V
Wed Jul 06, 2022 2:00 am
Forum: General Discussion
Topic: Cutting Narrow Snap Ring Groove?
Replies: 7
Views: 131

Re: Cutting Narrow Snap Ring Groove?

What RussN said. Until one is capable of hand grinding lathe tools in HSS, he/she will be held captive. Thin grooving tools are not that hard to grind, not even to proper size. Takes a little practice. One thing that is VERY helpful is to lose the grinding rest. All it does is get in the way. H
by Harold_V
Sun Jul 03, 2022 3:05 pm
Forum: General Discussion
Topic: Digital caliper accuracy
Replies: 22
Views: 541

Re: Digital caliper accuracy

I think it depends on the accuracy required for the job. True! The problem is some folks get the idea that readings from a caliper are gospel, and they typically are not. There's way too much history with their use to assume otherwise. Used within their parameters, especially for a job where "close...
by Harold_V
Sun Jul 03, 2022 3:34 am
Forum: General Discussion
Topic: Digital caliper accuracy
Replies: 22
Views: 541

Re: Digital caliper accuracy

The problem with resolution within a thou is that critical fits are more demanding of size than that. If you're trying for a snug slip fit, even a half thou is more than enough to eliminate the desired clearance, be it too much or too little. If you're trying for a proper press fit of a drill bushin...
by Harold_V
Sat Jul 02, 2022 3:33 pm
Forum: Lathes
Topic: Making a precision pivot point thoughts?
Replies: 7
Views: 193

Re: Making a precision pivot point thoughts?

It is quite common for holes drilled with a twist drill in thin material to come out three sided. Even reaming won't guarantee a round hole, although it will generally be of much nicer quality than just drilling. Taper can be a problem with reamers, as can bell-mouthing and multiple sided holes---ge...
by Harold_V
Sat Jul 02, 2022 1:43 am
Forum: General Discussion
Topic: Digital caliper accuracy
Replies: 22
Views: 541

Re: Digital caliper accuracy

Otherwise, your measurements are not useful. That's a point I've tried to drive home on several occasions (usually in discussing calipers of any description). Sort of like the idea of garbage in, garbage out. If one doesn't have a true reading and is attempting to make parts to exacting specificati...
by Harold_V
Thu Jun 30, 2022 3:24 pm
Forum: General Discussion
Topic: Bushing material question
Replies: 13
Views: 393

Re: Bushing material question

For a working fitting (any type of motion, be it fast or slow), steel on steel is pretty much a poor choice. Doesn't really matter which alloys are combined, with the problem of scoring exacerbated by lack of lubrication. As Bill stated, stainless is generally a poor choice due to its propensity for...
by Harold_V
Thu Jun 30, 2022 1:45 am
Forum: Lathes
Topic: Show us your lathe!
Replies: 580
Views: 280331

Re: Show us your lathe!

Great score! LeBlond built very robust and functional lathes. Looks to be in quite good condition.

H
by Harold_V
Mon Jun 27, 2022 2:44 pm
Forum: Live Steam
Topic: Lower melting temp cadmium free solders for boilers
Replies: 11
Views: 527

Re: Lower melting temp cadmium free solders for boilers

I can't help but wonder if, maybe, the 1,100°F temperature implies that the solder won't degrade below that temperature. Oxidation is a problem with most molten metals.

H
by Harold_V
Mon Jun 27, 2022 2:35 pm
Forum: General Discussion
Topic: Surface Grinding
Replies: 149
Views: 39526

Re: Surface Grinding

It has been my experience that getting things square (high precision) with a vise is difficult. When I hope to achieve true squareness, I use an angle plate of known quality.

H
by Harold_V
Mon Jun 27, 2022 1:11 am
Forum: Build Log
Topic: Converting a Baldwin 2-4-2 LYN to a Baldwin 2-4-4
Replies: 928
Views: 354019

Re: Converting a Baldwin 2-4-2 LYN to a Baldwin 2-4-4

Yep! It is sharp! Very nice job, Charlie.

H
by Harold_V
Sat Jun 25, 2022 1:29 am
Forum: Lathes
Topic: worn cross slide repair?
Replies: 5
Views: 275

Re: worn cross slide repair?

You can expect the bed to have similar wear for both the carriage and the tailstock unless the ways are flame hardened. It may or may not be obvious. How does the tailstock align with the spindle? When there's excessive wear you can expect the centerline to be low and the quill may even have a tende...
by Harold_V
Fri Jun 24, 2022 2:59 pm
Forum: Lathes
Topic: worn cross slide repair?
Replies: 5
Views: 275

Re: worn cross slide repair?

I can't imagine that the worn cross slide isn't representative of the overall condition of the lathe. If it is in need of repair, the balance of the machine can't be too far behind. While some folks have successfully rebuilt such a machine, how successful they have been is likely questionable. To re...