Trouble with parting off tools

[julianthegypsy]

I used a glanze parting tool with inserts on my capstan lathe, mostly parting 15mm stainless steel. It was a lever operated toolpost and I found it needed a good amount of pressure on the lever to keep it sweet. Too gentle and it would howl like a banshee. It rook me forever to get the height set properly too, just a tiny fraction below centre. Once I got it though I parted hundreds of pieces with perfect results every time and a nice curling ribbon of swarf.

 

[Robotstar5]

I have a separate wheel for tungstens with a sign on it that say do not use for anything except tungstens incase anyone else is using my tools

Not that anyone will take any notice, we had people grinding steel, aluminium, even wood on ours 'til I fitted a maintenance only keyswitch.

 

[Pete.]

Grinding HSS on a diamond wheel is a no-no anyway unless you use a slow speed and coolant. The heat from friction knocks the edge off the diamonds. I hone my tools with a hand lap.

 

[brightspark]

Not that anyone will take any notice, we had people grinding steel, aluminium, even wood on ours 'til I fitted a maintenance only keyswitch.

drat how do they sharpen there pencills now

 

[BrokenBiker]

Not that anyone will take any notice, we had people grinding steel, aluminium, even wood on ours 'til I fitted a maintenance only keyswitch.

in college we had a tutor grinding brass on a surface grinder

 

[Shox Dr]

Why not grind tungstens?

It cuts into the wheel, and I don't have the means to dress it

 

[BrokenBiker]

It cuts into the wheel, and I don't have the means to dress it

that reminds me i need to make a dressing tool for my general use wheels

 

[brightspark]

in college we had a tutor grinding brass on a surface grinder

how did he manage that they have a magnetic bed or was he hand grinding it

 

[Pete.]

It cuts into the wheel, and I don't have the means to dress it

A CBN wheel perhaps but a tungsten would not cut into an electroplated wheel. They are only £15 from China.

 

[brightspark]

that reminds me i need to make a dressing tool for my general use wheels

just use an old diamond cutting disk of a grinder after u have finished with it to dress the wheels or use a carbide drill run it across

 

[Pete.]

I make my dressing tools from diamond core bit teeth. They kick up a very fine abrasive dust but they do put a lovely finish on the wheel.

 

[Sidewinder]

I use diamond wheel dressing blades for my AlOx wheels, the ones I saved from when I worked as a Service Engineer on Camshaft & Crankshaft grinding for a machine tool OEM at an automotive OEM plant, we had to change them before they were totally worn out, so I kept them rather than throw them in the waste, and this was before the recycling of such things became a revenue stream for the company, it was a cost when I kept them, so I saved the OEM money!

 

[BrokenBiker]

just use an old diamond cutting disk of a grinder after u have finished with it to dress the wheels or use a carbide drill run it across

as I have good condition rests on both wheels my plan was to braze a broken off carbide drill onto a bit of steel, put 2 pins in to guide it so it is perfectly parallel to the wheel and then run it across the rest, adjust the rest inwards afterwards and then its ready for next time it needs dressing.

 

[Mr shiney]

as I have good condition rests on both wheels my plan was to braze a broken off carbide drill onto a bit of steel, put 2 pins in to guide it so it is perfectly parallel to the wheel and then run it across the rest, adjust the rest inwards afterwards and then its ready for next time it needs dressing.

Or buy a dressing tool for a fiver.......

 

[BrokenBiker]

Or buy a dressing tool for a fiver.......

no fun in that though, plus id have nothing to use my broken carbide drill for then

 

[doubleboost]

I was told that if the cutter starts to chatter feed it in harder
nine times out of ten it works
Don't back off be brave lol

 

[brightspark]

I was told that if the cutter starts to chatter feed it in harder
nine times out of ten it works
Don't back off be brave lol

then watch 1 percent job slowly rotate up the tool before it snaps

 

[doubleboost]

 

[eil]

John
I've always wondered why you sold your Bantam and got a Boxford, or shouldn't I ask

 

[MrFluffy]

how did he manage that they have a magnetic bed or was he hand grinding it

Clamp brass in toolmakers grinding vice, stick vice to mag chuck.
You can get soft silicon carbide wheels to do aluminum in a sg, and also appropriate grades of wheel for brass too.
Plus if you really want, you can dismount the mag chuck and most surface grinders have a t-slot bed underneath that you can clamp to with the usual methods. Or, use double sided tape and grind dry.
Or block the non magentic thing in with magnet sensitive stuff. You can get little comb style camps the mag chuck sucks down into non magnetic parts, mite-bites or something theyre called.