What's on your bench today?

[Eddy_t]

Not happy, got my new chain for the Danarm at the weekend but it was too long so ordered some straps and ties. Straps and ties arrived today so I rushed out to shorten the chain. Chain shortened and fitted and it isn't running smoothly on the drive sprocket, it's seriously bad

 

 

 

So double checked the new chain measurements against the older chain that came with the saw and all appears ok, distance across 3 rivets is 13/16" on them all (one Laser Brand, one Carlton and one Oregon). Pulled the drive sprocket but there are no markings on it. There is a bit of wear on the spurs but there's also a bit of play in the sprocket bushing (oilite bushing rather than needle roller bearing) It looks like the chain is riding up off the spurs, is there any way to measure a sprocket to find out what pitch of chain it takes?

 

 

Danarms use a unique and extremely rare chain in 7/16" (.437"), Oregon 59 chain is .404. You will either have to track a roll of chain down or modify the clutch drum.

[R Mac]

Hi Eddy,

 

thanks for the info, that would explain why the chain wouldn't sit properly on the sprocket.

 

I have 2 options then, look for some 7/16" or modify the clutch drum. Any suggestions on how to go about modifying the drum?

[Eddy_t]

Hi Eddy,

 

 

 

thanks for the info, that would explain why the chain wouldn't sit properly on the sprocket.

 

 

 

I have 2 options then, look for some 7/16" or modify the clutch drum. Any suggestions on how to go about modifying the drum?

 

 

Remove the sprocket and weld a .404 sprocket onto it

[R Mac]

It would definitely need to be welded properly, certainly well outside of my skill level. I might try to find some 7/16" chain first.

[GardenKit]

Something just a little different on my bench today.

Any ideas?

[bikewoo]

Something just a little different on my bench today.

Any ideas?

[ATTACH]195514[/ATTACH]

 

A starter for something silly?

[Logit]

Light aeroplane mover ?

[GardenKit]

A starter for something silly?

Good guess........wrong!

[GardenKit]

Light aeroplane mover ?

Good guess.......in fact a perfect guess.. Correct!

 

Well that quiz was quickly over.

[bikewoo]

Light aircraft puller?