right disk for sharpening shear grab

GERMAN ROCKS

lads what is the right disk to use for sharpening shear grab blades.

Nekarsulm

No

GERMAN ROCKS wrote: »

lads what is the right disk to use for sharpening shear grab blades.

A good quality flat file.
A grinder will heat the edge and take the temper out of it.
Wear a pair of heavy leather welding gloves so you don't slice your finger off when your hand slips.

Miname

I use the flappy sandpaper discs and take your time.

RightTurnClyde

Miname wrote: »

I use the flappy sandpaper discs and take your time.

Ya, flap paddle disks are perfect for the job.

orm0nd

I have a variable speed 4 inch grinder I bought in Aldi

with a worn grinding disc and set at slowest speed it would sharpen a razor blade

MfMan

RightTurnClyde wrote: »

Ya, flap paddle disks are perfect for the job.

What is the correct method when using the flap disk to sharpen? Move it both ways or just one? Work towards the blade tip or away?

davidk1394

I wanted to bump this thread to ask a question. I tidied up my shear grab and I want to edge the blade. Just wondering can I use this grind stone my drill to edge it ? Thanks

Reggie.

https://www.boards.ie/discussion/comment/121601352#Comment_121601352

Would the drill have too high a speed on it

davidk1394

https://www.boards.ie/discussion/comment/121601562#Comment_121601562

It's a twin speed drill. I was thinking the lower speed would be fine.

cjpm

https://www.boards.ie/discussion/comment/121601352#Comment_121601352

Those are for use in a die grinder which is typically spinning at 22k rpm……

So your drill definitely won’t be too fast.

Use flap disc here too. Works well

SuperTortoise

https://www.boards.ie/discussion/comment/121601352#Comment_121601352

You'd be faster with a hand file, honestly.

If a blade is really bad, shape it with a flap disk and do the final honing with a file, you can leave it good enough to shave with.

Danny healy ray

https://www.boards.ie/discussion/comment/121604303#Comment_121604303

with all the videos on you tube iv yet to hear of one with a lad sharpening a shear grab with a file which is a pity

Cavanjack

I’ve a Johnston grab after doing 13 winters and it’s cutting like new. A slight rub of a file to take any dull edge off it is all it needs. I’d usually give a look at the start of the winter and round Christmas and file out any burrs but haven’t done either this year.

No need to be grinding with a flap disc or any other kind of disc.