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Who sells cut-off blades that aren't tapered (or some other kind of side relief)?
Who sells cut-off blades that aren't tapered (or some other kind of side relief)?
Ayup. Those are tool blanks not parting blades. I suppose, 'a tool blank to make a parting blade from', might be accurate.
All is not lost, however. Play around with a protractor and see what angle you need. Gonna be between 3 and 7 degrees. Play with the rest on a bench grinder to get pretty darn close to that, and dress down one side.
I found a set of Vice-Grips and using them to clamp another tool bit, on to the rest of the grinder allowed a fella to keep a pretty steady and even grind on.
Flip the tool blank around, adjust the clamped down tool bit a bit closer to the wheel, and do the other edge.
I have done this with cut off blades that were too wide to fit my holders, plus for some holders I made. Worked well.
As I recall, I set the clamped guide at an angle so as I fed the tool blank across the rest, it only really ground on the edge of the wheel face. You can tap the clamped guide with a chunk of bar, and creep it in a wee bit closer at a time between passes, and you get a pretty nice, straight edge, with a bevel.
If you are going to err on the angle, make it so the blade squeezes in towards the holder, rather than wedging a sharp edge into it and reducing the stiffness.
You will still have to grind some side relief on the parting blades, but you will at least, get to use what you bought, if only after a little rework.
I have some new old stock Armstrong blades
If you holder is a Armstrong No. 20 I have some new old stock Armstrong blades for it. See pics attached ( I hope )
Shipping may be costly though. The drawing is an exaggerated view of the profile looking from the non cutting end. If your holder is a different model I may have the correct blades as well as I have about 30 lbs. of unused old HSS parting blades. Sam
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Yes, I have an Armstrong No. 20. That is what I was looking for. I send you a private message
uruguay that's funny a guy i work with is from there a Rubin Gomez hell of a nice guy
I don't mean to hijack - but just out of curiosity would you happen to have any in 1" x 1/8" size?
If you holder is a Armstrong No. 20 I have some new old stock Armstrong blades for it. See pics attached ( I hope )
Shipping may be costly though. The drawing is an exaggerated view of the profile looking from the non cutting end. If your holder is a different model I may have the correct blades as well as I have about 30 lbs. of unused old HSS parting blades. Sam
View attachment 323026View attachment 323027View attachment 323028View attachment 323029
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