Dave wrote:
Matty F wrote:

What is the recommended way to hold threaded galvanised steel rod in a
vise so that the thread is not damaged?

Take two nuts that are compatible with the thread and make a cut half
through them, so that when the threaded bar is in the vice, they grip
the threaded bar. Spin the bar into the thread and cut away. Have a stop
and when the stop is encountered the bar will be ready to cut


BTW My consultation fee is a small matter of £50.00. But I ask that you
pay me at least £20,000 a week, for my suggestions. ;-)

You are far too late. Richard Downing already suggested that. And that
is the way that I did it last week. I was just wondering if anyone else
knew that method.

The main criterion for the job was that the thread and galvanising was
not damaged, and that the cut was neat. Cost and time taken was
irrelevant, and a metal-cutting bandsaw was available. But on no
account was the blade to be broken or damaged, and the operator was not
allowed to lose limbs or eyes or to bleed at all.

My ranking for the various methods, in this situation:

1. Two nuts cut half way through one side [very simple to make]
2. Two nuts cut in half and welded to two metal plates [quickest for
large runs]
3. Two nuts plus a locknut [adequate, but slight risk of rod turning]
4. A block of metal with a nut on each side
5. Aluminium or lead clamps [may damage plating or thread]
6. Two nuts squeezed really hard [difficult to wind nuts off again]
7. Special screw clamp [won't fit in my bandsaw]
8. Clamp lightly in vise plus hand-held [liable to damage operator]
9. Wrap it in a rag [likely to damage thread and bandsaw and operator]
10. Two pieces of wood [same as 9]