7 pin vs 8 pin ??

[t4driller]

I rebuilt an 066 for a guy and he uses it to make ripping cuts in soft wood with a 44 inch bar. That's all he uses it for. Right now he's running an 8 pin. It's really hard to get the bar on and off because of the chain not being long enough. It's the same way with my 25 inch bar on it. Performance wise, would it be better with the 8 or 7?

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[Mag Craft]

I think for the type of cutting he is doing I would use a 7 pin my self. How does the saw perform with a 8 pin. Does the saw bog down easy while making cuts with the 44 inch bar. Or is the wood he is cutting small enough that it does not cause a problem for the saw.

What is the reason he likes to use a 8 pin rim. I know it makes the chain speed faster.

 

[stihl saws]

7 pin unless it has a small block Chevy under the hood.

 

[t4driller]

I think for the type of cutting he is doing I would use a 7 pin my self. How does the saw perform with a 8 pin. Does the saw bog down easy while making cuts with the 44 inch bar. Or is the wood he is cutting small enough that it does not cause a problem for the saw.

What is the reason he likes to use a 8 pin rim. I know it makes the chain speed faster.

He builds log homes. It's all soft wood. He uses it to cut the doors and windows out and to buck up the big posts under the main beam of house. He has a helper handle on the end of the bar so another guy can keep it straight. He didn't say it bogs. I just wanted to make sure he was setup right. It's a royal pain getting bars on and off. Like the chain is to short. When I originally had it to rebuild it, it had a 7 pin on it. I had no problem getting bats on and off.

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[stihl saws]

He builds log homes. It's all soft wood. He uses it to cut the doors and windows out and to buck up the big posts under the main beam of house. He has a helper handle on the end of the bar so another guy can keep it straight. He didn't say it bogs. I just wanted to make sure he was setup right. It's a royal pain getting bars on and off. Like the chain is to short. When I originally had it to rebuild it, it had a 7 pin on it. I had no problem getting bats on and off.

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To me that is a job that requires precision versus maximum chain speed. I don't build log homes though. I just cut trees for fun and profit.

 

[Gunn]

You may see guys running 8/9 tooth sprockets on this site, but the majority of time a 7 tooth sprocket will net you the best results.

 

[t4driller]

He has a level bubble on saw and helper handle. Most of the time he's going very slow to make straight cuts. I have it setup on the rich side cause he's running at wot but going slow to make a straight cut.

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[Mag Craft]

The chain is tight because with a 8 pin rim it is shorter. I would run a 7 pin rim now that you have mentioned he cuts slow due to accuracy.

 

[Deets066]

7 pin for sure

 

[Nitroman]

You may see guys running 8/9 tooth sprockets on this site, but the majority of time a 7 tooth sprocket will net you the best results.

If one is actually using the dawgs, I agree the 7-tooth will be about the best unless the wood is really small diameter.

 

[Philbert]

If the only problem is getting the chain on and off, why not add a link or two to the chain loops?

Or file the mounting slots a little longer?

Philbert

 

[DELETED (Struggle)]

It would seem a 44 bar is getting into 880 territory using it in a comer a level like he is. If you running enough bat that you use a helper handle. Soft wood or not for sure an 8 pin seems like asking a lot giving the way he is running it.


Sent from somewhere

 

[t4driller]

It would seem a 44 bar is getting into 880 territory using it in a comer a level like he is. If you running enough bat that you use a helper handle. Soft wood or not for sure an 8 pin seems like asking a lot giving the way he is running it.


Sent from somewhere

He's actually not using the entire bar. The helper handle covers about 8 inches of the end of the bar. The most he could use is about 30 inches, accounting for handle and spikes. I went to his site the other day to see how he's using the saws. Most of his cuts he's running at wot but doesn't have the bar dogged in with much load on it. He's scorched quite a few saws. The ones I rebuilt have been holding up good so far. He's running a 440, 066, 261, and a 290. I rebuilt the 440 and 066. The 261 is next on the list to do. The biggest problem I seen was running at wot with no load and air filters that are completely packed full.

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[jmssaws]

I have a few saws that would run a 10pin I'm sure but for work regardless of how strong the saw is I run a 7pin, it's easier on the saw and the operator.

Face cuts and boring is much easier with a 7pin,never built a log house though but it seems a 7 would be better for his clutch.

 

[cus_deluxe]

[QUOTE="jmssaws, post: 85177, member: 291"for work regardless of how strong the saw is I run a 7pin, it's easier on the saw and the operator.[/QUOTE]
This

 

[stihl saws]

He's actually not using the entire bar. The helper handle covers about 8 inches of the end of the bar. The most he could use is about 30 inches, accounting for handle and spikes. I went to his site the other day to see how he's using the saws. Most of his cuts he's running at wot but doesn't have the bar dogged in with much load on it. He's scorched quite a few saws. The ones I rebuilt have been holding up good so far. He's running a 440, 066, 261, and a 290. I rebuilt the 440 and 066. The 261 is next on the list to do. The biggest problem I seen was running at wot with no load and air filters that are completely packed full.

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Maybe he's scorching saws from using rims that are to big for the bars. What rims and bars were on the other saws?

 

[bikemike]

He's actually not using the entire bar. The helper handle covers about 8 inches of the end of the bar. The most he could use is about 30 inches, accounting for handle and spikes. I went to his site the other day to see how he's using the saws. Most of his cuts he's running at wot but doesn't have the bar dogged in with much load on it. He's scorched quite a few saws. The ones I rebuilt have been holding up good so far. He's running a 440, 066, 261, and a 290. I rebuilt the 440 and 066. The 261 is next on the list to do. The biggest problem I seen was running at wot with no load and air filters that are completely packed full.

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Remove filter cover and use the uni or HD and filters won't clog up as fast

 

[SawTroll]

The chain is tight because with a 8 pin rim it is shorter. I would run a 7 pin rim now that you have mentioned he cuts slow due to accuracy.

I agree, but optionally he could add a dl to the chain, if the tightness is a issue. Also, I fail to see the point of using an 8-pin for the described use (or for any use, with a 44" bar).

It is an issue if it keeps him from doing normal maintenance/cleaning and flipping the bar....

 

[t4driller]

Maybe he's scorching saws from using rims that are to big for the bars. What rims and bars were on the other saws?

440 has a 25 inch with 7 pin, 290 has 18 inch with 7 pin. When I rebuilt the 066 it had a 7 pin on it. I put a new clutch , drum, and rim on it. He must have switched it when he put the 44 on.

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[t4driller]

I agree, but optionally he could add a dl to the chain, if the tightness is a issue. Also, I fail to see the point of using an 8-pin for the described use (or for any use, with a 44" bar).

It is an issue if it keeps him from doing normal maintenance/cleaning and flipping the bar....

It was a brand new oregon 44 bar. He said he never takes it off because it's a pain to get off. It would have been easier for me to take the drum off to get the bar off. I took it home to touch the chain up. I'll probably grab some filters and a 7 pin and go back to his site to switch stuff around.

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