Fixing a Harbor Freight style Arbour Press.

**Paul Alciatore** · Mar 20, 2022, 08:41 PM

That PDF is a very nice article. Thanks for posting the link. I have a 3 or 4 ton arbor press which was probably US made. I haven't had it apart to check, but I will probably do so and see if there any gibs in it.

PS: A slight further improvement would be to substitute some long set screws for those hex head bolts for the gib adjustment. They would stick out less and be less likely to injure a stray hand. Do keep the lock nuts and size the set screws to be flush with the nut after adjusting and locking with the nut. IMHO it will also look more professional.

**Toolmaker51** · Mar 20, 2022, 08:49 PM

Enco was never my favorite brand; but the founders Nathan & Charles Usiskin had a grasp of quality control while maintaining pricing. They were pioneers of imported machine equipment. Best point was they sourced world wide, knowing the right areas excelled at certain products. The fact MSC bought them out indicates their standing, but new owners have little evident discretion.

**tonyfoale** · Mar 21, 2022, 02:36 PM

Originally Posted by Paul Alciatore

That PDF is a very nice article. Thanks for posting the link. I have a 3 or 4 ton arbor press which was probably US made. I haven't had it apart to check, but I will probably do so and see if there any gibs in it.

PS: A slight further improvement would be to substitute some long set screws for those hex head bolts for the gib adjustment. They would stick out less and be less likely to injure a stray hand. Do keep the lock nuts and size the set screws to be flush with the nut after adjusting and locking with the nut. IMHO it will also look more professional.

The lock nuts are essential of course but I will not be spending the time to shorten the screws. I assume by set screw you mean what I would call a grub screw. The screws as fitted are what I know as set screws, i.e. a bolt threaded over the full length.

**Toolmaker51** · Mar 23, 2022, 03:57 PM

Originally Posted by tonyfoale

The lock nuts are essential of course but I will not be spending the time to shorten the screws. I assume by set screw you mean what I would call a grub screw. The screws as fitted are what I know as set screws, i.e. a bolt threaded over the full length.

set screw = grub screw seems consistent, whether it's American English or British origin. Is it Continental (?) to call very small grub screws 'grains'?
Meanwhile; here, a bolt threaded full length is named "tap bolt". By 'full length', implying not those threaded to the head common in shorter increments.

**tonyfoale** · Mar 23, 2022, 04:16 PM

Originally Posted by Toolmaker51

set screw = grub screw seems consistent, whether it's American English or British origin. Is it Continental (?) to call very small grub screws 'grains'?
Meanwhile; here, a bolt threaded full length is named "tap bolt". By 'full length', implying not those threaded to the head common in shorter increments.

I have never heard the name grains before nor tap bolt, but then I have led a sheltered life.
Except for a spell of 4 days I have never worked in a machine shop or factory environment so I have not been exposed to hearing others name things. Neither were tool names high on my mother's list of things to teach me.

**Saltfever** · Mar 23, 2022, 06:23 PM

Since I have never been on a F-1 team I have never heard of a grub screw in my life. Only with the rise of world wide technical/mechanical content on You Tube have I been exposed to the term. This definition seems to indicate "set" or "grub" are interchangeable.

**Toolmaker51** · Mar 24, 2022, 07:50 AM

Originally Posted by Saltfever

Since I have never been on a F-1 team I have never heard of a grub screw in my life. Only with the rise of world wide technical/mechanical content on You Tube have I been exposed to the term. This definition seems to indicate "set" or "grub" are interchangeable.

Good ol' Wikipedia. Reliable info, in a vast majority of subjects.
I had online college courses, one in Sociology (pointless PITA). The instructor forbade Wikipedia as resource for citation, meanwhile course book was of his own authorship. Imagine that...
Of course, I wrote first assignment with that as citation *1.
He graded it fully negative (as expected).
Immediately took up case with the institution's arbitrator. Simple question, how the professors own work (commissioned, royalties) represented a more reliable slice of public view, than voluntary - random - unsolicited - contributions that make up vast content found in Wikipedia.
Paper was regraded 99/100.
Inspiration was comedian (George Carlin?) comments on student campus demonstrations. "Why are we paying attention to students? They're STUDENTS!"

**tonyfoale** · Mar 24, 2022, 08:45 AM

Originally Posted by Saltfever

Since I have never been on a F-1 team I have never heard of a grub screw in my life. Only with the rise of world wide technical/mechanical content on You Tube have I been exposed to the term. This definition seems to indicate "set" or "grub" are interchangeable.

I cannot imagine grub screws being used by F1 teams, not their sort of fix.
I had forgotten but you have reminded me, I was a works manager for an F1 team in a previous life.

Wiki says <<....the term "set screw" or "setscrew" refers simply to a bolt which is fully threaded, with no smooth shank...>> which is what I have always understood.

**Saltfever** · Mar 24, 2022, 06:17 PM

Totally agree, Tony. I thought of the same thing before I posted it but left it in anyway to see if I would get a comment out of you! LOL I was actually inferring I have had no close European mechanical/technical involvement and so some colloquial, technical words are new to me.

I noticed “Grub” a few years ago on this forum primarily used by British and Aus/NZ contributors. I thought it was a British thing. A couple of years later Eastern European postings (with ads!) started to appear and “grub” was also being used. I then realized how extensive its use was. DTI (dial test indicator) is another commonly used term from across the pond. When I was an apprentice (before ER collets were invented) the only thing I heard was “hey kid, use a test Indicator on that”. While in the industry for the past half century, I never heard DTI until a few years ago on this forum. It’s quite interesting seeing the appearance of some words with the advent and ease of world-wide communication.