Thread: Why you need an air micro die grinder

Originally Posted by nearnexus

I haven't used the diamond discs. I'm interested.

I just double checked, it's swiss not german. The one i have is Edenta 355.524.220HP. Edenta.ch doesn't seem to have a jewellery catalog. For illustration, see Balsas Dental, Edenta, Discos de Diamante second column third row. There are lots of different shapes - not sure what they are all for. Max 15,000rpm.

Edenta "The English version will be available soon."

The disc is very thin and a bit flexible. So it works a bit like the ultrathin angle grinder cutting discs on a much smaller scale. Works for cutting, fiing, sharpening, shaping small things. The flex makes it gentle if using the face, especially if speed is controlled. Usually I use the junk Arlec Supertool. It's easier to maintain a straight cut with the diamond disc than with a big file. Diamonds are a boy's best friend!

The discs listed on ebay may be thicker and less flexible, since they have interchangeable discs with a screw, so YMMV.

I'd say for $30 the micro air grinder is a bargain. I'm thinking of getting a spare from Bunnies, as long as it has the smaller collet for dental burs as well. (don't forget the earplugs) The cons are noise, low torque, and lack of portability.

BTW, I saw the 200pc Hitachi accessory kit (3mm shaft) at Tradetools. Think it was $35? Same as bundled with the hitachi mini grinder - see photo Hitachi Mini Grinder With Accessory Set 200pk - Masters Home Improvement

[QUOTE=blouis79;1697849.

The disc is very thin and a bit flexible. So it works a bit like the ultrathin angle grinder cutting discs on a much smaller scale. Works for cutting, fiing, sharpening, shaping small things. The flex makes it gentle if using the face, especially if speed is controlled. Usually I use the junk Arlec Supertool. It's easier to maintain a straight cut with the diamond disc than with a big file. Diamonds are a boy's best friend!
[/QUOTE]


So do you recon the diamond discs are equal to a small friction disc for cutting steel ?

Cheers

Rob

Has anyone tried the dental style diamond burrs? They seem very cheap...

10 Boxes Dental High Speed Handpiece 157 Kinds Diamond Burs | eBay

Originally Posted by nearnexus

So do you recon the diamond discs are equal to a small friction disc for cutting steel ?

Cheers

Rob

here is a load of dental diamond disc brands - apparently used for ceramic. edenta seems to have a big range and low price in Usa compared to aus.
Pearson Dental Supplies Supplies

i have used mine for cutting off long steel and stainless screws. they are fairly hard. does a fine job. super thin kerf seems to help.

Just finished making a holder for the $30 Pencil Air Grinder to allow it to be held in the toolpost of the Hercus 260 lathe.
Made it in aluminium with a split holder arrangement so that its on the lathe centre height when clamped into the toolpost.
Packing can be applied under the holder to bring it above centre for end mill sharpening as per the earlier You Tube.
Machined it up in the Hercus O Mill & then drilled & tapped for 2 only Csk 8-32 screws, then set it up in the 4 jaw chuck bored it out to .613" bore to accept the body of the Air Grinder.
All I need now is a mandrel 1/8" spindle with a suitable collet (to be made) & a thin cut off friction type grinding wheel.
If anyone can suggest where I might get these, it would be appreciated.
regards
Bruce

Originally Posted by Abratool

Just finished making a holder for the $30 Pencil Air Grinder to allow it to be held in the toolpost of the Hercus 260 lathe.
Made it in aluminium with a split holder arrangement so that its on the lathe centre height when clamped into the toolpost.
Packing can be applied under the holder to bring it above centre for end mill sharpening as per the earlier You Tube.
Machined it up in the Hercus O Mill & then drilled & tapped for 2 only Csk 8-32 screws, then set it up in the 4 jaw chuck bored it out to .613" bore to accept the body of the Air Grinder.
All I need now is a mandrel 1/8" spindle with a suitable collet (to be made) & a thin cut off friction type grinding wheel.
If anyone can suggest where I might get these, it would be appreciated.
regards
Bruce

Most major hardware stores stock a range of cutoff disks for the dremel and similar. These will do the job. There are also HSS cutting blades available on EBay and other sources. Last night I watched a Keith Fenner video where he found a HSS cutting blade that was about 8mm in diameter. He laughed himself silly.

I would be inclined to make a mandrel as the ones supplied as per Dremel are a bit basic and have very little support for the cutoff wheel. They use two plastic washers.

Dean

Originally Posted by Abratool

Just finished making a holder for the $30 Pencil Air Grinder to allow it to be held in the toolpost of the Hercus 260 lathe.
Made it in aluminium with a split holder arrangement so that its on the lathe centre height when clamped into the toolpost.
Packing can be applied under the holder to bring it above centre for end mill sharpening as per the earlier You Tube.
Machined it up in the Hercus O Mill & then drilled & tapped for 2 only Csk 8-32 screws, then set it up in the 4 jaw chuck bored it out to .613" bore to accept the body of the Air Grinder.
All I need now is a mandrel 1/8" spindle with a suitable collet (to be made) & a thin cut off friction type grinding wheel.
If anyone can suggest where I might get these, it would be appreciated.
regards
Bruce

Very nice Bruce, neat and tidy as usual

Phil

Originally Posted by Steamwhisperer

Very nice Bruce, neat and tidy as usual

Phil

Phil
Thanks for your kind comments Phil.
It was not a piece of rocket science to make this holder, however I do like fiddling around making this stuff.
Its just good to read what others do on this forum, & continue learning.
Just very good therapy.
Thanks again.
Bruce

Originally Posted by Oldneweng

Most major hardware stores stock a range of cutoff disks for the dremel and similar. These will do the job. There are also HSS cutting blades available on EBay and other sources. Last night I watched a Keith Fenner video where he found a HSS cutting blade that was about 8mm in diameter. He laughed himself silly.

I would be inclined to make a mandrel as the ones supplied as per Dremel are a bit basic and have very little support for the cutoff wheel. They use two plastic washers.

Dean

Dean
Thanks, I have just been to Bunnings & purchased a set of Dremel no 426 cutoff grinding wheels (5 wheels)
also for the low price got a Dremel no 402 mandrel. All up cost $15 for both.
Agree with you, the cut off wheels needs metal support washers each side & I will make these together with a 1/8" dia collet to fit the air pencil grinder.
Thanks again for the hint.
regards
Bruce

Originally Posted by Abratool

Dean
Thanks, I have just been to Bunnings & purchased a set of Dremel no 426 cutoff grinding wheels (5 wheels)
also for the low price got a Dremel no 402 mandrel. All up cost $15 for both.
Agree with you, the cut off wheels needs metal support washers each side & I will make these together with a 1/8" dia collet to fit the air pencil grinder.
Thanks again for the hint.
regards
Bruce

I am always happy to be able to help someone out. I try to redress the balance as much as I can but I am losing the race. I guess I should accept that with all that great knowledge out there that is always happily given.

Dean