Search found 15 matches

by Chipper5783
Tue Aug 07, 2018 11:51 pm
Forum: General Discussion
Topic: Bolt stretch
Replies: 47
Views: 6371

Re: Bolt stretch

Tha break away torque on a bolt that is torqued to 80 ft-lbs will be significantly higher than 80 ft-lbs. the reason is that the static friction that has to be over come to get it moving will be a good bit higher than the sliding friction when it was being tightened. How much higher? Tough to guess....
by Chipper5783
Sun Jul 29, 2018 11:09 pm
Forum: Home Shop CNC
Topic: Why not to Buy Cheap Jet CNC Mill?
Replies: 13
Views: 7566

Re: Why not to Buy Cheap Jet CNC Mill?

Dave has a good point, Steve has not stated what he wants to do with the CNC, nor what his constraints are (budget, space, power, opportunities, etc). I suppose there is "no free lunch". If you buy a cheap mill, you'll end up with a cheap mill - and perhaps that will work for you. You can convert a ...
by Chipper5783
Tue Mar 13, 2018 7:02 pm
Forum: Milling Machines
Topic: INT/ISO30 collets
Replies: 18
Views: 5859

Re: INT/ISO30 collets

In my rebuilding 4my Rockwell vert./Horz. mill and deciding on tooling needed, I have often wondered whether there was such an animal as 30 taper collet. Like in the pic. I'm thinking they would come in very handy for using with reduced shank drills in the Horizontal mode. Rather than giving up roo...
by Chipper5783
Tue Mar 08, 2016 7:21 pm
Forum: General Discussion
Topic: Hybco 1100 Tap Grinder ?
Replies: 2
Views: 1350

Hybco 1100 Tap Grinder ?

Has anyone any experience using a tap grinder? Specifically, how multi-purpose is this? How well would it work for any other cylindrical tool grinding (reamers, end mills, drill bits, ...)?

Regards, David
by Chipper5783
Sat Feb 13, 2016 7:36 pm
Forum: Lathes
Topic: Follower rest tips?
Replies: 13
Views: 2920

Re: Follower rest tips?

The threading worked out well (you are certainly right Harold about this material machining well). I forgot to take pictures of the threading set up - pretty straight forward. I took it to about 95% complete supported only by the chuck and tailstock. I could not take much of a cut or it would start ...
by Chipper5783
Tue Feb 09, 2016 10:50 pm
Forum: Lathes
Topic: Follower rest tips?
Replies: 13
Views: 2920

Re: Follower rest tips?

Thanks to all for their input. The choice of stainless steel material was because of the application (it is the advancing screw for an old meat slicer). I did not go with the option of simply purchasing threaded rod, as the securing end is to be smooth and is secured by two snap rings on either side...
by Chipper5783
Fri Feb 05, 2016 11:20 pm
Forum: Lathes
Topic: Follower rest tips?
Replies: 13
Views: 2920

Follower rest tips?

I am making a lead screw (not for a machine tool) and struggling. The target size is 0.750, the blank is about 19" long and material 316SS - then 15" of 3/4-10 thread. I started with 1" bar (being what I had on hand) and when simply cutting with only the chuck and tailstock for support, found the vi...
by Chipper5783
Tue Jan 19, 2016 10:18 pm
Forum: Lathes
Topic: Collets
Replies: 6
Views: 1987

Re: Collets

You could just make up and MT4 to C5 adapter and a draw bar. I did that on my 15" lathe (except MT5 to C5). That worked okay, but the lathe was not set up for this so the carriage wings would hit the head stock gear box. Not a big deal, I would just crank the compound out or reach with the tool. Sur...
by Chipper5783
Mon Jan 18, 2016 10:39 pm
Forum: Milling Machines
Topic: DRO on the Cheap... any suggestions?
Replies: 12
Views: 4512

Re: DRO on the Cheap... any suggestions?

There are many options, go with what you are comfortable with. I suggest you don't be in too big a hurry. Why do you need a DRO? Of course they are nice, speeds up most tasks, makes a few tasks possible (at least vastly easier than going to Excel and building a spreadsheet of X-Ys for bolt circles, ...
by Chipper5783
Mon Jan 18, 2016 10:25 pm
Forum: Milling Machines
Topic: Gearbox Oil
Replies: 10
Views: 3022

Re: Gearbox Oil

That will have a very basic gear box. Probably straight cut gears (possibly helical - I doubt it). You want a DTE or circulating oil. Something with rust and oxidation inhibitors. You do not need (and do not really want) oil with EP additive and you do not want detergents (like engine oil). The actu...
by Chipper5783
Sat Jul 18, 2015 10:25 pm
Forum: General Discussion
Topic: What are these? Pics
Replies: 19
Views: 2282

Re: What are these? Pics

These are calipers but what use do they have in machine work? Similar to woodworking? All are Starrett except the large one. http://i1263.photobucket.com/albums/ii630/beeser1/72cf091b-8d8d-4849-bb43-fa62e21c1522.jpg Spring calipers are handy in the shop. Sometimes you need to determine a measuremen...
by Chipper5783
Sat Oct 25, 2014 11:49 pm
Forum: General Discussion
Topic: Machines are too big
Replies: 22
Views: 3071

Re: Machines are too big

Two lathes in a one man shop is really nice: - sometimes I've got something set up, when another job comes along - sometimes one breaks down (can keep on going, or need another lathe to fix the first one) - capabilities are a bit different (a given job is easier on one machine vs the other). I have ...