square holes? · Aussieveedubbers

akean1 · 16 Mar 2005, 2:24 pm

im trying to fit a towel rail bumper on to super bumper brackets. i need to have square holes for the bumper bolts.
any ideas on where to buy square drill bits?:duh
or how to make square holes in the bumper, they will be re chromed in the future, so im not to fussed about heat marks etc.

HotRodMatt · 16 Mar 2005, 3:02 pm

Drill a small hole and get cracking with a small die grinder?

I think you will find they were punched from the factory. Unless you have a substantial hydraulic press and a good square punch the die grinder will be your best bet.

Chewy · 16 Mar 2005, 3:06 pm

Or use a drill bit slightly smaller than the width of the square and file the rest out with a square file.

Bizarre · 16 Mar 2005, 3:14 pm

you can buy square hole punches.

Drill hole - put bolt through - do up and it "pulls" a square cutting bit through into a "block" on the other side.

Use to use them when i made switchboards

StenGuns · 16 Mar 2005, 3:14 pm

Mate.. I found that number for the chroming..
Modern Plating, Oakleigh Vic, 03 9568 4588 ask for Jimmy or Harry.. Very good work
Rob

akean1 wrote:im trying to fit a towel rail bumper on to super bumper brackets. i need to have square holes for the bumper bolts.
any ideas on where to buy square drill bits?:duh
or how to make square holes in the bumper, they will be re chromed in the future, so im not to fussed about heat marks etc.

Andy · 16 Mar 2005, 3:19 pm

Square file the way to go! Pre-drill first.

Dare I ask what your up to?

akean1 · 16 Mar 2005, 3:37 pm

thanks stenguns.
what sort of places would sell those pullthrough punch's?
andy, im going hybrid 50's to 70's😉

Andy · 16 Mar 2005, 4:23 pm

You'll have to post some pics when done 🙂

akean1 · 16 Mar 2005, 4:33 pm

they will go in members rides under "akean1's on its way"
http://www.aussieveedubbers.com/forum/viewthread.php?tid=34468

Bizarre · 16 Mar 2005, 6:12 pm

akean1 wrote:what sort of places would sell those pullthrough punch's?

not too sure - engineering type places ..... Blackwoods???

here is one link

http://www.eastwoodco.com/shopping/product/detailmain.jsp?itemType=PRODUCT&RS=1&itemID=1492&keyword=28056

and here

http://www.classicsandcustoms.com/eastwood/categories/111.asp

Think it is the same one though

Might be too big as well
there is a great tool shop at Granville here
I will see if i can find there buisness card / web site
If anyone sells itthey will

Stanley · 16 Mar 2005, 7:22 pm

Or alot of engineering or sheet metal places have large hole punch machines,
They usually have all sorts of dies..where I used to work years ago we had a machine for doing such things...amazing the thickness of sheet the can pinch through.
Obviously this will cost folding stuff.

Special Air Service · 16 Mar 2005, 8:01 pm

Break out the file