Shearing advise needed.

[Dawai]

http://www.harborfreight.com/18-gaug...ear-92148.html

$6.99 flat shipping would get it here, then I could repost it to you.. Not sure what that'd cost.. I sent something to a guy on HSM there and it was about $15..

Looks like they no longer list the replacement blades. When you buy the $39.99 shear it comes with extras thou. (this is 120 volts thou)

Dan says they are "great".. he has a table mount made for his to flip it upside down and hold the metal, not the shear. (I've not bought one of these) I have a milk crate of name brand shears with broken blades.. The blades for the major manufacturer brands are just "silly" priced.

The only "tool steel" I have here is a six foot bar, I tried to cut it with a portaband saw, it just squealed as it peeled teeth off the blade.

[kit]

Can anyone give me these Pullmax cutting tool grind angles please?



The top picture is the tooling for straight shearing, the lower picture the tooling for cutting curves.

[kit]

Also, do you use a guide table to suport the work with these tools? I can't see how that would work out in relation to the height you set it to and how close either side it would come to the tooling?

[bobadame]

You set the support to be even with the lower blade. The angle is pretty shallow and the top punch only enters the material about 1/3 of it's thickness. I have the angles and instructions at home unfortunately I'm about 10 days away from there right now. Meant to post it before I left but got busy. If you haven't found the angles by July 4 I'll post them.

[Rick (madera)]

Don Houseman gave a demo on the pullmax at Santa Cruz . If I remember it is either 11 or 13 degrees that is both directions

[Metlmodr]

I measured it at 12 degrees

[Overkill]

Rick, it was 13 degrees, both directions.

Kent White adjusts his cutters close enough that they will cut paper.

[kit]

I want to thank everyone who replied on various formats to these questions, I'll get grinding today, thanks.

Thought I'd try this setup yesterday, reground an old lathe tool as a bottom tool to take off the rake where it butts up against the top tool and used the tool I'd made for louvre cutting as a top.



I took a guess at the bottom tool angles based on the Pullmax pictures and wondered if the top tool shape would provide the ability to do straight cuts and curves, I can't fault the results, cuts cleanly and doesn't mark up the sheet running it through by hand without a suport table, I have to stroke right through the sheet as my machine hasn't the oophh of a Pullmax so i'm not sure wether a table will cause more problems, it will be interesting to grind up the correct profiles for a comparison.
Biggest problem I had was the machine throwing it's belt under load, I had suceeded in knocking it over (mark 1 wheels) and it landed with the corner of the bench vise on the main drive pully which I haven't straightened out properly yet as I'm still setting the whole thing up, landed a belt spot on evenly sitting up on a roof beam, try doing that twice!

[bobadame]

Hey Kit, here are the angles you were asking about.