CBN grinding wheels?

Anyone use them? I was looking at them today, but the price is very high and the reviews are only so-so.

 

Expensive yes. But worth it.

 

Definitely the way to go if the price is tolerable.
No wheel dust, no dressing.
If you do a lot of chains the dynasaw ABN wheel from Bailey's is totally awesome.

 

Never used cbn on a chainsaw chain, but it's the 2nd, 3rd? hardest material known to man. My guess on why people don't like them is 2 part. One, They are different to dress if you need to or want a different wheel profile. Two, They cut aggressively and can heat up a chain enough to soften a heat treated tooth.

 

Aggressive cutting is less heat going into the tooth that's why they work better. You can only dress resin bond cbn wheels and most chainsaw chain wheels are plated,

 

Got a link. I don't see them on Bailey's

 

I really like the CBN wheels. In fact, have 3 of them now, 1 for 3/8, .404 chain, 1 for .325 and 3/8P and a raker wheel.
We got them from this place...
Chainsaw Sharpening Wheels | Super Abrasive CBN

 

1+ from this link. I also have the CBN from this website and they work great. As others have said, expensive and you have to bump the tooth with it so you don't heat it up to much. I've got a wheel for my 3/8" pitch and a 1/4" for the rakers. Need to get a .325 wheel yet, but am holding off until I wear out my pink wheels that came with the grinder.

 

Other problem is the quality of these is all over the map. plated wheels can be replated at apx 80% of orginal cost. Resin bond I do not know but based on my others that i use I think not. some 20+ years ago I tried these wasn't happy for cost vs output, about a year ago same deal -back to stone for me. Might just have been the particular wheels I had, your milage may vary.

 

Dang, I can't find them either. Seems like they have their own brand wheels now. Just Google Dinasaw abn. Not sure who's selling them now.

 

Love em. Night and day difference over stone. Made my cheap knockoff grinder worth using.

Chainsaw Sharpening Wheels | Super Abrasive CBN

 

You can redress resin bonded wheels. They can also be contoured. If you push a resin bonded wheel too hard it will remove parts of the wheel and change contour. Resin bonded wheels will need to be redressed since the exposed abrasive will be pulled out after enough use. Resin bonded wheels typically are the cheaper wheels.

Metal wheels with abrasive bonded to them come in 2 types. Single layer and multiple layer. Single layer will have a steel wheel that is contoured and then coated with a thin layer of abrasive. Multi layer will have around a half inch of abrasive bonded to the cutting edge. Multi layer can and will need to be redressed. Abrasive can be bonded with a resin but typically brass or nickel.

When I said they cut aggressive and cause teeth to loose heat treat , screw loose is right, if the wheel is used properly. Only small quick kisses of the chain are needed. What I've seen is people decide to make all their teeth the same length in one go and end up really hogging out alot of material. Cbn metal bonded will do it but it puts a lot of heat into the tooth. You can get a tooth red at the grind edge and watch the heat flow back along the tooth. If you have had someone grind a chain and all the teeth come back straw ,purple, or blue in color they got hot. It will look like a chopsaw cut, sometimes with a big booger burr hanging onto the curved undercut.

 

Meche_03 said the most important thing little kisses.
It's grinding not milling. Best to go around a couple of times on a bad chain.
Also only grind CLEAN chains !! Oil, swarf, sap ect will load the wheel and really increase heat.

 

Exactly, heat is dissipated in the material removed. A loaded wheel, or any cutting tool for that matter, holds the removed material, thus holding heat. A primary function of using lube in drilling or milling is to prevent loaded and getting chips away. Coolant flooding or misting provides cooling, but also some lubrication to allow chips/material to be removed.

 

I like to set the wheel just off the tooth and bump it into the tooth. Most of the time you only need a fresh surface, and .003-.007 is plenty.

 

You haven't seen the tree service chains I get in. next batch that comes in I will start shooting some pics. If damage can be done they cover all the possible ways.

 

Please do!

If still have the chain I got on a saw I bought from a one man type of "tree service", I'll post a pic. It had zero depth gauges left.

 

I saw a decent chipper at the gas station. While looking at it I saw a BUNCH of cut marks in and around the chute.
Owner said the experienced guy he hired did it when cutting stuff that wouldn't fit.
Those hired hands are pretty destructive.

 

I like my CBN wheels, as said, gentle on the amount taken off and clean the wheel now and again.