Jump to content

Log in or register to remove this advert

Sprocket life expectancy...


Dilz
 Share

Recommended Posts

Just a wondering about the life expectancy of drive sprockets. When i was first taught about using saws a rough rule for replacements was 3 chains to a bar - 3 bars to a sprocket. Based on chains and bars getting worn through use rather than abuse. 

 

Had look at 261 at a company, its about 18months old - the sprokect was really worn - my guess is the chain has been run at the wrong tension too much,

a 550 has  a worn sprocket as well but that saw had the misfortune of being handed to a very special kind of worker to use as his own saw as everyone got annoyed with him wrecking all the saws and just leaving them back on the shelf. 

A 440 thats been with the company a good few years and seen a lot of use,  hasn't had a sprocket replaced on it and the one that was original is in good condition. 

 

Now is this a case of user causing the wear or are some sprockets just lasting longer?  maybe built of things other than oriental tin? 

 

 

Link to comment
Share on other sites

Log in or register to remove this advert

The general rule is that all MS261s and MS362s that come in get a new sprocket kit. All others get a new rim or a new spur sprocket now and then.

I still don't understand why the 261s and 362s eat sprockets - I believe it is a cunning plan by Stihl to make money on their Satan's creations. I think only one 261 escaped my rule in a good number of saws!

If the end of the spur gear has indentations then it is time to swap it!

The MS261 must be one of the worst sounding saws - the exhaust note goes right through my head!

  • Like 3
Link to comment
Share on other sites

On 2/4/2018 at 09:21, Khriss said:

My old rule of thumb is,

3 files to a chain

3 chains to a bar/sprocket

3 bars to an overhaul.k

 

( to guys who think the bar should last the life of a saw- but then in their hands that's usually 1 8months ;P )

What do you mean by overhaul?

Link to comment
Share on other sites

19 minutes ago, Dr Stihl said:

Stihl MS261 sprocket problems should now be a thing of the past, new rim sprockets were introduced late 2016 and no problems since, unless the crank was worn by the previous sprocket. 

+1 . From a very reliable Stihl source the clutch drums were the problem all along (a problem with the metallurgy) now resolved.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share


  •  

  • Featured Adverts

About

Arbtalk.co.uk is a hub for the arboriculture industry in the UK.  
If you're just starting out and you need business, equipment, tech or training support you're in the right place.  If you've done it, made it, got a van load of oily t-shirts and have decided to give something back by sharing your knowledge or wisdom,  then you're welcome too.
If you would like to contribute to making this industry more effective and safe then welcome.
Just like a living tree, it'll always be a work in progress.
Please have a look around, sign up, share and contribute the best you have.

See you inside.

The Arbtalk Team

Follow us

Articles

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.