Search found 160 matches

by TRX
Sat Jul 25, 2020 10:24 am
Forum: Lathes
Topic: Power feed drilling.
Replies: 32
Views: 11027

Re: Power feed drilling.

> not bad for some Indian taper shank bits I've had for 20-30 years. I ordered a 3MT drill from one of the "tool warehouse" places, some odd size like 47/64". It came in a brittle cardboard box with the drill wrapped in brown waxed paper. Made in Calcutta, with the old-style postcode, almost certain...
by TRX
Sat Jul 25, 2020 10:04 am
Forum: General Discussion
Topic: Has anyone built a guide for a center drill.
Replies: 9
Views: 913

Re: Has anyone built a guide for a center drill.

Back in ancient times there were machines that you stuck the end of a bar into and they centered and drilled it automatically.

You could make an end cap on the lathe, stepped to accept the workpiece and the center drill, and use a hand drill to make a centered hole.
by TRX
Sat Jul 25, 2020 9:54 am
Forum: General Discussion
Topic: Wheel Balancing wheights
Replies: 10
Views: 1096

Re: Wheel Balancing wheights

Zinc has been the most common that I've run into, but some seem to be metal (iron?) powder in a plastic matrix. Nastier than the coated ones if you accidentally drop one in the melting pot.
by TRX
Sat Jul 25, 2020 9:51 am
Forum: General Discussion
Topic: Duburring Raw Stock
Replies: 14
Views: 799

Re: Duburring Raw Stock

> direction

Shaviv has both right and left hand scraper blades. The other companies probably to as well.
by TRX
Sat Jul 25, 2020 9:48 am
Forum: General Discussion
Topic: Min-Its center finder
Replies: 9
Views: 559

Re: Min-Its center finder

I like earlgo's version too. Not many machines are limited by throat depth; seems like Z is often a problem.
by TRX
Mon Mar 30, 2020 6:49 pm
Forum: General Discussion
Topic: Thinking about cnc
Replies: 7
Views: 1738

Re: Thinking about cnc

Are you planning to write G-code by hand, or will you use CAD/CAM? If you haven't used any CAD stuff, be aware that most programs are driven entirely by tiny icons differentiated only by even tinier dots of color. If you don't have perfect color vision you may wind up having to memorize "six icons t...
by TRX
Fri Feb 28, 2020 8:37 pm
Forum: General Discussion
Topic: spring loaded tap follower
Replies: 12
Views: 3858

Re: spring loaded tap follower

Now make another plunger with a 60 degree countersink, for the occasional taps that have a point instead of a countersink. I have a bunch of those, all number sizes and <4mm metrics.

I took the easy route and bought a made-in-India cheapie off eBay; I wish I'd bought or made one long ago.
by TRX
Fri Feb 28, 2020 8:29 pm
Forum: General Discussion
Topic: LED Shop Lighting
Replies: 147
Views: 26754

Re: LED Shop Lighting

On the subject of failures I put 8' flourescents in when I built my shop in 1992. They cost a bit more than 4' shop lights, but the bulbs used spring-loaded "toilet paper roll" mounts; push, angle, release, and the bulb is in, much better than trying to twist 4' bulbs into positon while wobbling on...
by TRX
Wed Feb 19, 2020 3:15 pm
Forum: Milling Machines
Topic: Laser Align Round Head Mill Drill.
Replies: 12
Views: 4304

Re: Laser Align Round Head Mill Drill.

Try unbolting the column from the base, make sure there's no swarf or paint blobs trapped between the base and the bottom casting on the column. You might try re-indexing the column if that doesn't square it up. Note the quill might not be square to the column, either... you can check that pretty ea...
by TRX
Wed Feb 19, 2020 3:05 pm
Forum: General Discussion
Topic: LED Shop Lighting
Replies: 147
Views: 26754

Re: LED Shop Lighting

LED lamps for lighting wear out by slowly dimming (much more slowly than incandescents or fluorescents). End of life is defined as when the light output drops below a specified level. Incandescents simply quit working one day. The CFLs all died with, apparently, power supply failures - blackened ba...
by TRX
Fri Feb 14, 2020 3:11 pm
Forum: General Discussion
Topic: LED Shop Lighting
Replies: 147
Views: 26754

Re: LED Shop Lighting

Last year I bought a 6-pack of LED bulbs to fit my 4-foot shop lights. I finally got around to taking the first fixture down and apart. Hm. I have no idea how old it was, but the plastic ends were snapped into divots in the metal housing. Even with a long, thin screwdriver I broke most of the mounti...
by TRX
Mon Feb 03, 2020 4:09 pm
Forum: Lathes
Topic: Vee belts for lathe
Replies: 5
Views: 3145

Re: Vee belts for lathe

The link belts won't grip the pulleys as tightly in reverse, and can slip. The only time I've ever used reverse was when threading away from the headstock. That doesn't take much oomph. Note if you put new V belts on the Sheldon, it probably uses "industrial" or "compressor" belts, which are shallow...