Author Topic: Race chain practice  (Read 2906 times)

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Offline concretegrazer

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Re: Race chain practice
« Reply #10 on: May 01, 2016, 03:35:43 pm »
With regard to stoning. I've been able to find very little information on this. Is this just further "smoothing" the rivets or is it actually do something to the cutter too. when I "YouTubed" it I could fine only one very short video that Mike did, but it wasn't very telling. He was using one of those fancy chain vices. Would you mind going into detail with how you do that? Do you use a Japanese Waterstone or something, and if so what sort grit stone.Do you do it with the chain mounted on the bar/saw-(technique)?


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Your doing the sides of the cutter. I use a wetstone. I thought mopar said he's used a file. Thers some info on it in the fhc squarefiling thread I think.

The objective is to bring all the cutters in line so your not waisting power cutting unnecessary kerf. Look at the sides of the cookies. A normal chain will leave them rough. With a well stoned chain it will be smooth.

Offline Cut4fun .

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Re: Race chain practice
« Reply #11 on: May 01, 2016, 05:57:12 pm »
One of the square filing thread here.  Pretty sure stoning the cutters was mentioned there too. http://chainsawrepair.createaforum.com/chain/hand-square-filing/

Most folks use a knife type sharping stone. Doing 3-5 cutters at a time.

Offline Cut4fun .

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Re: Race chain practice
« Reply #12 on: May 01, 2016, 06:03:21 pm »

Do you think you're going to do 3/8 or .404 for the next one?


We have done 3 cube and 3120 chains in 3/8 in past. There was talk of doing a 404 since we never tried that chain.   

Who knows what the future holds. I know the timing of doing this rd 3 was all wrong for 75% of the folks though. So  we need to make sure on the time like rd 1.


Offline Cut4fun .

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Re: Race chain practice
« Reply #13 on: May 01, 2016, 06:06:08 pm »
Yes you can do it with a bar mounted on a old case with a electric motor with chain on backwards for stoning too.

Offline 3000 FPS

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Re: Race chain practice
« Reply #14 on: May 01, 2016, 09:04:09 pm »
Sierrawoodsman this is only my second time doing a race chain myself so I too am learning just like you.    One of the things I did I had not even heard of
before but I went ahead and tried it any ways.    Kevin did some serious competitions for quit awhile and he has some good ideas about timing with a good sharp cutter and then doing all the other work and then timing again to see how much you have gained. 
PP 505, 475, 445.

Offline Sierrawoodsman

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Re: Race chain practice
« Reply #15 on: May 01, 2016, 09:22:12 pm »
Yes kevin has a good point about that. it makes a lot of sense to do that so you can understand how much gain you can expect from doing each of those little things.I'm going to try that next go around. I still can't for the life of me figure out more of the square did beat stock round.I think next time I may submit a stock chain as well. i'm thinking there must be some variability in stock chains too. Also, Was that a soft wood or hardwood cant? I just remember him saying that it was a beam that he had from his old barn that was probably from the 1800s.


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Offline concretegrazer

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Re: Race chain practice
« Reply #16 on: May 01, 2016, 10:04:01 pm »


Yes kevin has a good point about that. it makes a lot of sense to do that so you can understand how much gain you can expect from doing each of those little things.I'm going to try that next go around. I still can't for the life of me figure out more of the square did beat stock round.I think next time I may submit a stock chain as well. i'm thinking there must be some variability in stock chains too. Also, Was that a soft wood or hardwood cant? I just remember him saying that it was a beam that he had from his old barn that was probably from the 1800s.


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I believe that he was jokeing about the barn beam.

Offline Sierrawoodsman

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Re: Race chain practice
« Reply #17 on: May 02, 2016, 12:07:23 am »
Not much time to work at it today, did finish off the rivet thinning (as far as I felt comfortable) and tried out the stoning using a fairly course 250 grit Japanese Water Stone. Just put the chain on the bar and put it under some pretty good tension, then gave about 10 strokes (aft fwd direction only) or so and worked my way around both sides. I could definitely feel that it seemed to be "smoother" has the stone glided across on stroke number 10 then it did on number one. Not quite sure how much to take off but you can see how the stone Took off some of the outside of the tooth and the Raker at the same time. Also unsure if going to a finer grit would be of any benefit.


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Offline Sierrawoodsman

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Re: Race chain practice
« Reply #18 on: May 02, 2016, 12:21:21 am »
It felt very sharp afterward


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Offline mdavlee .

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Re: Race chain practice
« Reply #19 on: May 02, 2016, 12:51:24 am »
You did a lot more than I do. 2 or 3 strokes is plenty.
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