Search found 1346 matches

by Mr Ron
Tue Oct 31, 2017 10:33 am
Forum: General Discussion
Topic: Machinist's chest drawer lining
Replies: 25
Views: 785

Re: Machinist's chest drawer lining

Try double stick tape.
by Mr Ron
Mon Oct 30, 2017 10:46 am
Forum: General Discussion
Topic: TIR
Replies: 21
Views: 782

Re: TIR

Now that I understand TIR better, would it be cost effective to replace the HS bearings with ABEC 7 taper roller bearings on a Sheldon 11" lathe that is in excellent condition other than the TIR. Where are you measuring the TIR? Do the existing bearings have any play in them? When I checked it...
by Mr Ron
Sun Oct 29, 2017 10:56 am
Forum: Lathes
Topic: What Measurements Are Important
Replies: 2
Views: 375

Re: What Measurements Are Important

All measurements are important, but if a machine has been manufactured and certified to the standards specified in the test sheets, then it would be easy to replicate the tests to check if the measurements have strayed from the original tests. If they have strayed, what does that tell you? It is not...
by Mr Ron
Sun Oct 29, 2017 10:33 am
Forum: General Discussion
Topic: TIR
Replies: 21
Views: 782

Re: TIR

Now that I understand TIR better, would it be cost effective to replace the HS bearings with ABEC 7 taper roller bearings on a Sheldon 11" lathe that is in excellent condition other than the TIR.
by Mr Ron
Fri Oct 27, 2017 2:17 pm
Forum: Riding Scale Railroading
Topic: Lots of questions on 7 1/2" gauge railroad
Replies: 35
Views: 1668

Re: Lots of questions on 7 1/2" gauge railroad

When I worked at the shipyard, they used a hand cranked machine that printed a number every 6 to 12 inches on white single conductor wire. I don't know who made it, but a search for "wire printing machine" or similar wording may come up with a suitable machine. I would suspect that a compa...
by Mr Ron
Thu Oct 26, 2017 12:30 pm
Forum: General Discussion
Topic: TIR
Replies: 21
Views: 782

Re: TIR

Thank you for your input. I learn something new every day; and thank you for putting up with my dumb questions.
by Mr Ron
Tue Oct 24, 2017 11:35 am
Forum: General Discussion
Topic: TIR
Replies: 21
Views: 782

TIR

This may sound like a dumb question, but if I don't ask, then I won't know. If the TIR on a lathe spindle is say .003", what is the result of turning down a bar? I believe the bar will be perfectly concentric around the axis (perfectly round and not oval). If that is the case, is TIR really tha...
by Mr Ron
Sat Oct 14, 2017 12:16 pm
Forum: General Discussion
Topic: Help with spacer sleeves
Replies: 15
Views: 647

Re: Help with spacer sleeves

Hey guys, Most of you know I make fishing reels and this is the time of year were I am at the assembly stage. Part of that involves producing spacer sleeves to set the correct space between the bearings in the journal. This requires a great deal of precision as the difference between the inner and ...
by Mr Ron
Wed Oct 11, 2017 5:19 pm
Forum: Lathes
Topic: Hello All New here.
Replies: 24
Views: 912

Re: Hello All New here.

Harold_V wrote:
SteveHGraham wrote:I regret using a 3/8" carbide end mill to clean my ears.

Anyone with the least bit of understanding should know that ears are best cleaned with a 1" HSS aluminum cutting end mill.

H

I think a unibit would work better.
by Mr Ron
Mon Oct 09, 2017 12:34 pm
Forum: General Discussion
Topic: Model Machinist Book?
Replies: 20
Views: 1126

Re: Model Machinist Book?

This is the industry standard for dimensioning and tolerancing, used by the DOD and industry. It may be a bit overwhelming, but it has everything you ever wanted to know. I used this document when I was designing submarines at Electric Boat. http://www.dgpengshun.com/uploadfile/2015/0402/20150402103...
by Mr Ron
Fri Oct 06, 2017 4:21 pm
Forum: Lathes
Topic: How I Ended up with a Machine Shop
Replies: 20
Views: 1272

Re: How I Ended up with a Machine Shop

I started my small shop with an 11" Sheldon lathe which was fully equipped. I added a Palmgren milling attachment and used that for a while. i then bought a 6x24 knee mill. A lathe and mill is most basic in any shop and can handle a good 90% of any project with added accessories. The only other...
by Mr Ron
Mon Oct 02, 2017 1:14 pm
Forum: General Discussion
Topic: Sheet metal for building a tender and ballast car?
Replies: 10
Views: 525

Re: Sheet metal for building a tender and ballast car?

Glenn, I found one photo I could post. Hope this helps. I can get better pictures today and post them tonight. You can see both of the upper cab side wall right angle supports. There are identical angle pieces at the bottom of the cab wall.....they just don't show in this photo. At this point, I us...

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