Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 5 of 5
Thread: Mill Clamp Stud Threads
-
26th Jul 2020, 03:04 PM #1Golden Member
- Join Date
- Apr 2009
- Location
- Kingswood
- Posts
- 930
Mill Clamp Stud Threads
Got a job lot of clamp sets at auction, and found a mixture of 1/2" W, 1/.2" UNC and M12.
Started using the W set and found then easy to use, as compared to the M8 I had used for years on my small mill.
Then tried the UNC and M12.
Discovered the various threads had a different "feel" about them in regards tightening and removing the nuts and T-nuts.
The M12 being the worst, with UNC in-between.
Worst as in sticking.
In my opinion, the W thread form really stands out as superior in this application.
What do others think ?
But, I am keeping the M12 as I run a metric shop - no precision measurement in fractions here !
My practice is to inspect the studs before use, and wire-brush them to clean.
I have posted in the Sale section for disposal of the W and UNC clamp sets.
Keep well,
John.
-
26th Jul 2020, 03:11 PM #2Gear expert in training
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
- Posts
- 1,075
Can't say I've noticed the M12 sets at work being sticky
-
26th Jul 2020, 05:27 PM #3
Hi Guys,
I've a few 5/8" studs that came from a clamp set that I picked up. I found that the thread seemed to get harder to screw the nuts onto as they moved along, then freed up at the ends. I've put this down to the studs getting stretched in use. I've had this effect with stud/threaded bar as well.Best Regards:
Baron J.
-
26th Jul 2020, 06:54 PM #4Golden Member
- Join Date
- Apr 2009
- Location
- Kingswood
- Posts
- 930
My experience with M8 studs was that the stud threads built up adhering dust, dirt, and chips causing the nut fit to be temperamental.
Always cured by brushing with a wire brush.
The M12 and UNC seem to suffer the same problem, albeit to a lesser extent because of their size compared to M8.
In comparison, the W form seemed much more tolerant to the rubbish.
I put this down to the smaller flank angle and the rounded tips of the W form.
A very good mechanical design engineer told me years ago that the theory of thread fixings predicts less holding power of the W form compared to a similar size of metric/UNC form.
The difference can be important for permanent fixings, but could be an advantage for job clamping.
Keep well,
John.
-
26th Jul 2020, 11:16 PM #5Most Valued Member
- Join Date
- Mar 2011
- Location
- Southern Flinders Ranges
- Posts
- 1,536
If you find you need more M12 studs, a cheap way to buy decent pre cut studs is to buy Ramset or Hilti studs for the glue in epoxy system they sell for the building and construction industry.
Similar Threads
-
KANT-TWIST Round Handle Clamp 3/4", Clamp Mfg 396
By DSEL74 in forum METALWORK GENERALReplies: 7Last Post: 10th Aug 2019, 08:05 AM -
How to clamp 3mm aluminium plate to a mill table
By simplicio in forum METALWORK GENERALReplies: 11Last Post: 24th Sep 2018, 12:56 AM -
Clamp Kit for X2 Mini Mill/Drill
By Big Shed in forum METALWORK GENERALReplies: 1Last Post: 26th Jan 2009, 08:53 PM -
4 Stud Hub
By Teardrop.Camper in forum TRAILERS & OTHER FABRICATED STUFFReplies: 3Last Post: 8th Jan 2009, 01:47 AM -
Low Profile T-Slot clamp for the HM-45 mill
By jvdv in forum METALWORK GENERALReplies: 5Last Post: 24th Oct 2007, 04:17 PM