Lasting Angles for Grinding Chain

[WoodTick007]

I have Efco grinder with the tilting base that I purchased a while back from Jeff S. and I cannot get the chain that I grind to cut as well(or even close) to new chain out of the box. I use the angles that are reccommended on the boxes the new chain comes in. I also dress the wheel often to keep the cutting edge of the grinding wheel clean and true. I make sure that when grinding the cutter that I do not overheat it, and still it just will not cut like new RS or LG.

Can anyone help? Am I using the wrong angles? Is there a better grinding wheel than the pink ones that come with the grinder?

I would say that 50 percent of the time I get chains that look like they should cut great, but they don't.

Thanks

Greg

Ps. Yes, I do lower the rakers when required.

 

[Jacob J.]

Greg-

Those Efco grinders are round grinders if I remember correctly, you might try using a 30 degree top plate angle, and grinding down a little further into the tooth so your wheel bottoms out evenly with the factory "gullet".

When you look at your wheel profile it should be shaped similarly to a large round file but slightly less round, like an arc covering only 70-80 degrees instead of an arc covering 120-180 degrees. This will allow you to get the depth from the wheel without making too much of a "scoop", which would make a very grabby chain.

 

[WoodTick007]

Grabby Chain

Yes that is another problem I have is that the chains I grind are "Grabby"... I will give it a try.

Thanks!

 

[WoodTick007]

It just came to mind that my post might cause someone to think that the grinder I purchased from Jeff is causing the problems. It is NOT the grinder. It is an inexperianced operator. The grinder is awsome!!!

 

[Crofter]

Woodtick 007

What raker clearance are you using. Do you have a new factory cutter to compare with your work. How is it different. If it is the same and the raker height is right, it has to cut. There is no magic. Are you cleaning out the gullets between the raker and the cutter?

Frank

 

[jokers]

Hi Greg,

JJ gave you some good advice.

I struggled with grinding until Gypo encouraged me to give up on what seems obvious and experiment a little. Try some different profiles and angles. A profile that would resemble an arc with a 1/4" radius and the head tilted to 50° seems to work for me on the Efco style grinder. Also remember to just brush the sharpened tooth with a sharp wheel on the final pass for the sharpest chain.

Russ