Cam Chain Tensioner Roller Refurb or replacement

G-Man · Post by **G-Man** » Fri Jun 17, 2016 12:39 am

James Robert

Yes it is possible but you need some tooling to divide up the spacing of the teeth. It is my ambition to try and make gears / sprockets one day (not soon) and I picked up this at a swap meet for that purpose. It is called a 'dividing head' and offers precision angle setting for things like sprockets & gears.

G

james robert · Post by **james robert** » Fri Jun 17, 2016 8:32 pm

G man, A dividing head would be a necessity especially making sprockets. since it would take several operations to make a finished part.

modelman · Post by **modelman** » Sat Jun 18, 2016 3:05 am

I only 'cleaned-up' the old tensioner on my recent refurb, & seeing this article makes me want to improve mine, but I have a question.

Can I simply pull the unit from the cyl-block, or should the crank be 'set' at a specific position to prevent timing slippage? ( don't wish to go through that lot again ) !!

I have a lathe, grinder, mill etc. so can tackle most things.

Tim Miller · Post by **Tim Miller** » Sat Jun 18, 2016 7:35 am

Modelman, it doesn't matter were the crank is.

Tim

modelman wrote:I only 'cleaned-up' the old tensioner on my recent refurb, & seeing this article makes me want to improve mine, but I have a question.

Can I simply pull the unit from the cyl-block, or should the crank be 'set' at a specific position to prevent timing slippage? ( don't wish to go through that lot again ) !!

I have a lathe, grinder, mill etc. so can tackle most things.

james robert · Post by **james robert** » Sun Jun 19, 2016 11:14 am

G-man, You got me thinkin about how to make the sprockets. Tell me if I'm wrong but don't you have to drill the radius first for the chain rollers to ride in.If so two machines would be of help and two ways to index the sprocket in order to be able to make a quantity. If you could make a jig for the drill press or vertical mill with an indexing pin then that would free your dividing head for a small horizontal mill to cut the tooth pitch.

My post toastys are ready ; )

G-Man · Post by **G-Man** » Sun Jun 19, 2016 1:51 pm

James Robert

The bore for the needle roller would have to be bored in a lathe to get the correct level of precision but you are essentially correct.

G

james robert · Post by **james robert** » Sun Jun 19, 2016 2:38 pm

G-man, Yes you are correct the blanks would have to be bored and cut off in a lathe. I was thinking about how to speed up production after the blanks where done. It would be so much fun to set up production on something like this.I hope to have a shop of my own some day.

Thank you.