404 10 pin on a mac 125

[Macman125]

Anyone here have any luck running a large rim on a 125? I have a 42" bar on mine with a 7 pin. I rarely come into the occasion of needing a bar that long. I would love to stick a "24"-"28" bar on it with a larger rim so I can have some fun with it. I love running this saw when I get the chance (want to increase those chances lol).

 

[cbfarmall]

I think you'll find you will more trouble keeping the chain on the bar with a normal sized tail and a sprocket that big.

Chris B.

 

[Macman125]

I have a 101 I am debating on throwing in it. I just can't justify it though. I am already deep in this saw funds wise and can't see throwing a very valuable 101 in it when I could put the 101 in an old rup or on a kart and have loads more fun. The saw is not a dog by any means, still has plenty of compression and it rips with the big bar. I am just wanting to throw a smaller bar on it and increase the chain speed. I do not see how I would have a hard time keeping a chain on it. Saws today spin several thousand more rpm. I would think that a bigger rim would compensate for this loss?

 

[Macman125]

Ah, I see what you are saying about the tail size, makes sense. So a bar with a fat tail?

 

[spindrift7mm]

Fat tail and fat belly. Check out Canon Competion bars.

 

[Macman125]

Lol, I am not shelling out $300+ for a cannon (although they are nice). Any other options?

 

[bplust]

You could cut one of those older fat Mac bars in the middle and machine the slot and oil passage. I've seen it done for hot saws running big rims.

 

[Macman125]

I have been doing a little more research. I have a 7 on it right now. I could get away with a 8 and retain a factory bar? Would I notice a considerable difference?

 

[fearofpavement]

Yes, an 8 would work but I don't think you'll see a world of difference. That's a big saw, if I didn't need a big bar, I'd leave it in the truck.

 

[cbfarmall]

If you were handy you could cut a tail back some to a wider section of the bar and fit it a little better around the big sprocket. Of course, you'll have to recut the stud slot, redrill oil/adjuster holes, and reshape the grooves.

Or, leave the 101 to the long bar stuff.

Chris B.

 

[Macman125]

Yes, an 8 would work but I don't think you'll see a world of difference. That's a big saw, if I didn't need a big bar, I'd leave it in the truck.

That is the problem, I hardly ever run into anything my homie 550 won't take care of. Every once in a while I need the 42 for something. I think it would be better suited with a 28 on it. Plus, I enjoy running it.

If you were handy you could cut a tail back some to a wider section of the bar and fit it a little better around the big sprocket. Of course, you'll have to recut the stud slot, redrill oil/adjuster holes, and reshape the grooves.

Or, leave the 101 to the long bar stuff.

Chris B.

I have access to a bridgeport. I might find a fat belly bar and tinker.

 

[heimannm]

I have a 10 pin 3/8" sprocket on an SP125 with a short bar for a fun cookie cutter saw. So far I have not had any problems with the chain jumping off.



I do have a good selection of sprockets just for the fun of it, so far I've only run the 10 and 11 pin 3/8" but I have them up to 14 pin. I am sure that the bigger sprocket would certainly need a wider tail. I do have a harvester bar that Bill G gave me with a wide tail to accommodate the larger sprocket but it is only available with a .404 sprocket nose so I bought the 9 and 10 pin .404 sprockets.



Mark

 

[Macman125]

I have a 10 pin 3/8" sprocket on an SP125 with a short bar for a fun cookie cutter saw. So far I have not had any problems with the chain jumping off.

View attachment 476556

I do have a good selection of sprockets just for the fun of it, so far I've only run the 10 and 11 pin 3/8" but I have them up to 14 pin. I am sure that the bigger sprocket would certainly need a wider tail. I do have a harvester bar that Bill G gave me with a wide tail to accommodate the larger sprocket but it is only available with a .404 sprocket nose so I bought the 9 and 10 pin .404 sprockets.

View attachment 476563

Mark

So you did not modify the tail end of that bar for running that 10 pin?

 

[heimannm]

The harvester bar had a very large tail, no need to do anything for the 10 pin .404.

I did not do anything to the bar running the 3/8" chain but as you can see it is a pretty wide bar to start with.

Mark

 

[Macman125]

If I were to go this route, which would be faster to cut with? .063 3/8 or .404? Wanna sell of of them rims?

 

[heimannm]

My experience is that the thinner the kerf the faster it cuts, makes sense that you are removing less wood. 3/8" is faster when you are cutting cookies from cants.

It is very possible that in larger wood the fewer/larger teeth of the .404 could be faster.

I will try and remember to put up a name for the source of the sprockets tomorrow, that information is on my work computer.

Mark

 

[Deets066]

I've ran a 404 10 pin on my ported 090 with a 50" cannon. No modifying was necessary

 

[Macman125]

My experience is that the thinner the kerf the faster it cuts, makes sense that you are removing less wood. 3/8" is faster when you are cutting cookies from cants.

It is very possible that in larger wood the fewer/larger teeth of the .404 could be faster.

I will try and remember to put up a name for the source of the sprockets tomorrow, that information is on my work computer.

Mark

If I recall right, a while back you were in search of a cp125 muffler?

 

[sawfun]

I have run an 8 pin .404 on 50 & 36 inch bars
with a SDC working 101 and it did not like that at all, 7 pin performs much better. I have a BDC 101 that will pull the 8 pin 36" bar just fine. And now has a fat 28" bar with 1/2" chisel. However I haven't run that yet. Watch the raker height on working 101's as it is better to lower them than have too much chain speed for the cutters to bite.

 

[heimannm]

The CP125 uses the older round muffler. I have a pretty nice one on the rebuilt saw and I think one spare NOS one still waiting for a worthy project.



The source for the sprockets used to be called Danzco, I think the name has changed but the phone number is still correct 360 264 2141.

Mark