Instructables
Picture of THREADING AND OTHER USES OF VICE BAR
This instructable is in continuation of "VICE BAR: AN AID TO CLAMPING". It shows various ways in which a vice bar may be used. More emphasis is given on threading a metal rod with the help of vice bar (see step one for details).  Needless to say there can be more ways than shown in this instructable for using vice bar.

The instructable is broken into steps such that each step focusses on single application. Some applications use C-clamp. This will be evident from photographs. Explaination is given only in those applications where photographs cannot say it all. The order of applications (and hence steps) is as follows:
  • Holding metal rods for making threads using dies;
  • Holding sheets (wood, metal, ply, hardboard, plastic, etc.) of thickness from 1 mm to 2" (maximum thickness depends on the length of M6 bolt used; but longer bolt means more screwing and unscrewing);
  • Holding wood stocks;
  • Holding M.S. and alumunium stocks of various cross-sections;
  • For bending sheet metal;
  • For holding wood for planing, filing, drilling etc.;
  • As guide for straight cuts;
  • Holding page bundle;
  • Holding silk screen printing screen.
Requirements:
  1. Vice bar (see instructable "VICE BAR: AN AID TO CLAMPING" for instructions to make one)
  2. 6mm metal rod (mild steel, alumunium or brass or any other similar metal)
  3. Die
  4. Die wrench
  5. Metal file
  6. Adjustable wrench
  7. Two 3" C-clamp
 
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LynxSys1 year ago
I've never had to deal with the problems inherent in trying to tap threads onto two ends of the same rod, but I wonder if you could avoid cutting a flat onto the finished product by threading a few nuts onto the finished end with some high-strength (red) threadlocker and tightening the nuts against each other. The flats of the nuts would allow a good grip on the rod, and (especially with more than one nut) I doubt that you would break the bond of the threadlocker during the tapping process. Of course, the downside is that you have to wait 24 hours for the threadlocker to cure and you need to heat the rod to around 500 degrees Farenheit (260 Celsius) to break the bond and remove the nuts.
Captain Vyom (author)  LynxSys1 year ago
Thank you, for giving time to come up with a solution to the problem of avoiding flat. Sometimes there is a requirement for holding two plates or some components in compression or tension. In such cases full threaded rod is not required.

I think that the doubts you have raised can be solved. The problems of breaking of bond due to excessive torque and removal of the adhesive can be solved by making a little extra sacrificial thread and then moving on with your steps. Later these nuts can just be cut off.

I have tested instant adhesive (super glue). It sets within seconds and can be removed by a much lower temperature than you have mentioned. This adhesive might be used in place of thread locker but I cannot say about its strength.

If the threaded part at both ends is long enough may be the rod can be just tightened in the vice bar using just the nuts.
What a clever little invention :)
Thanks for sharing these skills!
darrenhall1 year ago
That is a great tool - so often the simple things get missed or passed over for gizmos and gadgets - if I still had my workshop then one of these would be made and ready right now for use.
josdevassy1 year ago
simply fantastic
gnach1 year ago
I'm convinced, thanks.
ajoyraman1 year ago
Very good consolidation of applications. Marvelous !
dtierce1 year ago
Perhaps a second bar could be attached to the first in place of the C-clamps?
Captain Vyom (author)  dtierce1 year ago
That can be done if longer bolts are used. In case of holding objects vertically two additional holes and bolts might be required. Use of second bar might eliminate the need of C-clamps but I think the arrangement will require testing for versatility that C-clamps provide. The second bar can be a good addition to vice bar and will increase its uses such as in bending sheet metal.
I've used something similar to bend sheet metal in a different way then you did. I have a 3/8" thick steel plate on my bench I use for welding. I drilled and tapped two holes to bolt a piece of 1.5" steel tube down to, like you do with your vise bar. I can then slip a piece of sheet metal between the tube and the plate, clamp it down and bend it down against the plate, creating a nice sharp bend.
I agree with you clamping sheet metal between two metal stocks will produce very good quality bends. Your experience might be incorporated in vice bar by providing two aluminium angles i.e. one on the worktable and the other at the bottom of the vice bar. In this arrangement C-clamps will not be required as vice bar will take care of clamping everything.
Wow ! … I didn't think of it when I had to (see my above remark). Thanks for the tip… the whole problem is to make I nice fold in the center of the piece when it is relatively large : I had to fold at 90° a 90cm wide sheet and I must say that although I was satisfied with the result as it was good enough for my needs it was less than perfect !…
Captain Vyom (author)  vincent75201 year ago
I learned the use of a mild steel block for bending sheet metal using a mallet in sheet metal shop in my college. There we were suppose to make small trays of galvanized steel sheet metal. So I just recreated that mild steel block by clamping an aluminium angle.

This method just works. It will certainly produce average quality bends but it is handy and quick. I agree this method of bending sheet metal has scope of improvement.
In "Step 7: HOLDING METAL STOCKS", it will be easiest to saw the metal if it is clamped as close as possible to the cut.
Captain Vyom (author)  ElectroFrank1 year ago
You are right. If you look closely at the photograph of step 7 in which the aluminium angle is held parallel to the vice bar, the end of the vice bar is suggested to be used as guide for starting the cut.

In the other arrangement where the angle is held perpendicular to vice bar, some other guide might be required.

Here, I will also like to say that purpose of using scrap wood stock is to eliminate the worry of spoiling vice bar with saw cuts.
lewisb421 year ago
Great set of examples. The guide arrangement for flush-held wood might solve a problem I've had using the jigsaw on small pieces of stock.
Captain Vyom (author)  lewisb421 year ago
It is good to hear that the instructable is useful and might be able to solve your problem. I guess your problem is of using a guide for small pieces of stock for straight cuts.
pfred21 year ago
In some of these arrangements where clamping pressure is being spread out what you are calling a vice bar is often named a clamping caul.

http://www.mikes-woodwork.com/images/Cauls/Cauls-21.jpg
Captain Vyom (author)  pfred21 year ago
Thank you, for introducing me to clamping caul. The purpose of using a thick square wood stock is similar to clamping caul. That is, thick stock does not bend thus allowing use of only two bolts at each end. This also allows holding objects of smaller width in the middle.
How to put imagination into good use !!!!…
However bending sheet metal the way you show it will always leave a wavy fold.
The only way to get it clean and straight is either using a sheet bender (ahem !… guess someone already thought of this …) or making a contraption that is inspired by it, such as four piece of wood with 2 edges cut 45° and clamps as shown here. However, although I had some relative success with it, it doesn't beat the original by far !…
Great tips! Thanks for sharing.
ceanes1 year ago
Very useful thanks
danjovic1 year ago
Amazing!!
rimar20001 year ago
Very useful info, thanks for sharing.