Holes

[confederatemule]

Why do Parallels have holes in them?

 

[fastback]

Mostly so they are easier to move and pick up. Some do not have the holes and some do. It does not affect the accuracy.

Paul

 

[JR49]

I recently read a description of a set of parallels (don't remember where) that said " with 2 holes for mounting ", but I have no idea what you would mount them to, or why. Anybody know? JR49

 

[R&D]

I recently read a description of a set of parallels (don't remember where) that said " with 2 holes for mounting ", but I have no idea what you would mount them to, or why. Anybody know? JR49

My dad hung them on finishing nails in a board at the end of the lathes. So "mounting" in his case meant hanging them in pairs for easy access.

 

[Andre]

You can use them to attach small ball bearings, and use as a makeshift sine bar. Adjust the bearings so the centers are at a easy distance. Not a 5" sine bar, so charts won't work. Do the trig (simpler than you think) or take a number from a chart, divide by 5, then multiply by the distance between bearings (In inches) to get your height of stack blocks needed for a certain angle. Clear as mud?

 

[planeflyer21]

The holes are for mounting to a machine vise: http://www.littlemachineshop.com/products/product_view.php?ProductID=3969

 

[planeflyer21]

That's not the link I was searching out.

Not that I've used them as such but older mentors have said they could be mounted to the machine vise for quick setup in production work.

 

[rgray]

So your wife doesn't give them to your neighbors that come over when your gone asking if they can have a piece of scrap iron.
It looks like a tool and is not mistaken for random stock.
I made some press plates once for pressing a 80 cc two stroke crank. Didn't make them look fancy or paint them. Some one came around looking for scrap.....guess what they got.