Chainsaw chain measuring /amount of links ?

[cessna]

I have just purchased a Sugihara bar to fit on my old Japa2100 processor.  The 15" Oregon bar that is on the processor now, uses  a .325 chain and 64 links . The new 15" Sugihara Solid  Bar uses a 3/8 pitch chain and the one that came with the bar is 56 links.  Unfortunately the chain is too short to allow me to get the bar on to the saw drive sprocket which is now a 3/8 drive sprocket. I am trying to find out how many extra drive links I will need to allow the Sugiharara bar and chain to fit on my chainsaw Suggestions on how I can work that out will be much appreciated.     

[Stubby]

8 hours ago, cessna said:

I have just purchased a Sugihara bar to fit on my old Japa2100 processor.  The 15" Oregon bar that is on the processor now, uses  a .325 chain and 64 links . The new 15" Sugihara Solid  Bar uses a 3/8 pitch chain and the one that came with the bar is 56 links.  Unfortunately the chain is too short to allow me to get the bar on to the saw drive sprocket which is now a 3/8 drive sprocket. I am trying to find out how many extra drive links I will need to allow the Sugiharara bar and chain to fit on my chainsaw Suggestions on how I can work that out will be much appreciated.     

I think it may be trial and error . There probably is a formula using distance between centers of drive sprocket and nose sprocket but you will have to " break " the new chain you can then add some tie straps , drive links and cutters with out actually spinning the rivets , just assembling it until you get a suitable length . ( then count the total drivers and write it down somewhere ! )

Edited October 4, 2022 by Stubby

[bmp01]

I think you could do it without breaking your 56 link chain, but you'll need to do some counting !

 

Put the chain on the bar only. Mark the bar with a pen right next to a rivet on top and bottom rail, count the number of drive links between marks. Take the chain off the bar and wrap it around the drive sprocket and a suitable distance up the bar, ie past the two marks you made earlier. Count number of links  between marks, add to previous number, job done. See pictures.

Might need an extra person or cable ties or something to hold the chain while count.

 

 

 

Edited October 4, 2022 by bmp01
Typo

[bmp01]

Just to add, my head gets in a spin sometimes, trying to not double count half a link at the ends, take care.

[Stubby]

56 minutes ago, bmp01 said:

I think you could do it without breaking your 56 link chain, but you'll need to do some counting !

 

 

 

 

 

I just thought he is going to have to break it anyway to make it the right length so .....

[openspaceman]

1 hour ago, Stubby said:

I just thought he is going to have to break it anyway to make it the right length so .....

Yeah but bmp01 is cleverer than us

[bmp01]

1 hour ago, openspaceman said:

Yeah but bmp01 is cleverer than us

Nah, kind of you to say, but I doubt it. I'm just a tight git and don't like wreaking stuff.   

[Stubby]

1 hour ago, bmp01 said:

Nah, kind of you to say, but I doubt it. I'm just a tight git and don't like wreaking stuff.   

Not wrecking it , just making it usable by making it the right length  or am I missing something vital here ?

[bmp01]

Dunno, although OP's here asking - so maybe it's safe to assume splitting and remaking chains is not a regular past time other wise he'd have just got on with it ? I guessed Cessna just wants to buy the right length chain with possibility to return the too short one. But I really dont know....

"Wreaking it" poor choice of wording on my part, soz.

[cessna]

thanks for all your replies .

I have sent the chain back to Chainsawbars and they are going to fit 2 extra links , as  said trial and error!!