Author Topic: Square Chain Tolerance  (Read 322 times)

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Offline 660magnum

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Square Chain Tolerance
« on: April 01, 2013, 02:51:17 pm »
I was doing a little square grinding today on my old style Silvey Swing Arm (Like the Simington 450) and was trying to stay consistent with tooth length. It was Oregon 3/8ths LGX chisel chain to begin with.

About the best I could do with tooth length even on the same side was .2mm which I thought was all over the place and horrible? I was being very careful about how much pressure I was exerting on holding the chain against the stop etc. That's about .008"  (Plus & Minus .004" ?) and a little hard to eyeball when you're comparing two pieces with converging angles. The chain looks good anyway.

Out of frustration I got out a new 60DL loop of Oregon CL square chain and measured the tooth lengths and they were within .55mm of each other. That's about .022". And that chain looks good too.

I didn't think that was a good tolerance that I was doing but it is better than what Oregon was doing? I made a couple cuts with it , , , Seemed OK to me.

I feel better now.

In spite of all the theory you read . . .  There is a tolerance to everything, dimension wise. Nothing is perfect!
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That knowledge can live after us... and that "Pays It Forward".
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Offline mdavlee .

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Re: Square Chain Tolerance
« Reply #1 on: April 01, 2013, 03:27:58 pm »
There is a big difference in cutter length with oregon. I'll grind one side and when I switch to the other I grind one tooth and then pull the loop up and compare to the other side. much easier than measuring with calipers.

Offline 660magnum

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Re: Square Chain Tolerance
« Reply #2 on: April 01, 2013, 04:18:23 pm »
I just did an old 72DL RSC that was well used and I didn't measure it with the calipers.

I just did a eyeball job on it.

I guess earlier I just wanted to know where it was at?

Saturday I did an old 57DL chain to square and I didn't use calipers on it. I just compared like you said.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline mdavlee .

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Re: Square Chain Tolerance
« Reply #3 on: April 01, 2013, 08:48:46 pm »
I never have checked a whole chain with calipers. I just eyeball mostly putting them side by side like that.

Online srcarr52

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Re: Square Chain Tolerance
« Reply #4 on: April 02, 2013, 11:05:10 am »
Stihl chain is usually within 0.015" on cutter length. 

With my Silvey RSII and the custom slide I made for it I'm able to keep within 0.005" pretty easily, but I usually have to fudge 1-2 cutters per chain to get them sharp. 

Offline 660magnum

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Re: Square Chain Tolerance
« Reply #5 on: April 02, 2013, 11:38:10 am »
+1
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

 

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