Search found 11 matches

by EricM
Mon Jan 20, 2020 3:25 pm
Forum: The Resource Library
Topic: Brown and Sharpe Micrometer Information
Replies: 2
Views: 425

Re: Brown and Sharpe Micrometer Information

The "adjusting nut threaded onto the barrel" you refer to is the nut used to adjust the threads to take out the play in them. It doesn't affect the calibration of the micrometer.
by EricM
Mon Jan 20, 2020 3:18 pm
Forum: The Resource Library
Topic: Brown and Sharpe Micrometer Information
Replies: 2
Views: 425

Re: Brown and Sharpe Micrometer Information

Try this: https://www.practicalmachinist.com/vb/general-archive/how-adjust-micrometer-94369/ Or this: https://www.instructables.com/id/How-to-Adjust-an-Older-Micrometer/ Or this, if it's being difficult: https://www.practicalmachinist.com/vb/general/how-unstick-micrometer-186808/ What models of B & ...
by EricM
Mon Jan 20, 2020 2:24 pm
Forum: General Discussion
Topic: drill bit helix
Replies: 4
Views: 523

Re: drill bit helix

From Viking Drill and Tool's website: Helix Angle (Spiral Angle) An essential feature of a twist drill is the helix angle (spiral angle). It determines the process of chip formation. Larger helix angles provide effective removal of soft, long-chipping materials. The high helix brings the stringy chi...
by EricM
Fri Apr 05, 2019 6:31 am
Forum: General Discussion
Topic: CMM granite surface plate grade ?
Replies: 3
Views: 2115

Re: CMM granite surface plate grade ?

I don't believe granite CMM tables have the same flatness / repeatability requirements as a true surface plate. In my experience, the CMM tables are NOT used as a datum reference, since the CMM software creates the datums on the part being measured. The granite is used typically for stability. I hav...
by EricM
Mon Jan 14, 2019 11:28 am
Forum: General Discussion
Topic: Flea Market Score.
Replies: 10
Views: 2418

Re: Flea Market Score.

I believe (on other another forum) an appropriate response would "You suck!" In other words, "Great find!" Diligence and patience pays off. :)
by EricM
Tue Sep 25, 2018 8:28 am
Forum: General Discussion
Topic: Craftsman Micrometers
Replies: 8
Views: 2135

Re: Craftsman Micrometers

I would be happy to claim Peter Marks as a relative, but I cannot. He, however, may feel otherwise. :) I have never met him in person, but we have communicated a few times through another forum.
by EricM
Thu Sep 20, 2018 7:10 am
Forum: General Discussion
Topic: Craftsman Micrometers
Replies: 8
Views: 2135

Re: Craftsman Micrometers

Peter Marks compiled an informational book about micrometers and their makers. The information was for his micrometer collection he was selling to start a scholarship program. (My apologies, Pete. My 2-sentence description of your work does not do it justice!) His book is an incredible reference sou...
by EricM
Mon Mar 12, 2018 12:55 pm
Forum: General Discussion
Topic: Gage Block Care & Feeding
Replies: 25
Views: 3817

Re: Gage Block Care & Feeding

From an article in Quality Digest... Care of Gage Blocks http://www.qualitydigest.com/may97/html/gguide.html by Drew Koppelmann Cleanliness is critical. Gage blocks must be stored clean and must be recleaned immediately prior to use. Gage blocks -- those apparently simple little chunks of steel that...
by EricM
Mon Oct 09, 2017 10:22 am
Forum: General Discussion
Topic: Model Machinist Book?
Replies: 20
Views: 3525

Re: Model Machinist Book?

Here's the ad that Pete refers to:
8PiecesofIron.jpg
by EricM
Tue Jun 28, 2016 2:04 pm
Forum: General Discussion
Topic: New Brown and Sharpe?
Replies: 16
Views: 2573

Re: New Brown and Sharpe?

Check out the website for Long Island Indicator Service: http://longislandindicator.com/ They give brand name comparisons on micrometers, calipers, indicators, etc. The ratings and comments they give are based on years of experience repairing them. No affiliation with them, just a satisfied customer...