Jump to content

Log in or register to remove this advert

Recommended Posts

Posted

I was having problems milling some sycamore last week and when I took the chain & bar off I noticed a crack in the bar.

It runs 2 thirds of the way across the width of the bar both sides just under where the jig clamp sits.

 

Anyone else had similar problems

Log in or register to remove this advert

  • Replies 28
  • Created
  • Last Reply

Top Posters In This Topic

Posted
Really first port if call to ask is rob d. Give him a couple of days to reply. He is a busy man. Who does lots of things.

 

I was going to suggest the same . He is a very helpful dude .

Posted

There is a trade-off with Sugihara bars in particular. They are much harder than anything else, which is why the wear so well. However this comes at the price of reduced toughness.

 

It would be interesting to see some close-up photos of the cracks but, without having seen them, my guess is that you will be able to see cracks starting from the edges of the rails and it would be possible to work out which side went first. I am anticipating seeing fatigue crack features and would be looking for the combination of notch initiation and stress raisers.

 

One thing that would be very useful in root cause analysis would be to know where exactly the crack is - powerhead end or nose end, and between the clamps or outside the clamps. My (educated) guess is that it will not be outside the clamp at the nose end. If I had to hazard a guess at location I would be going for outside the clamps at the powerhead end, with initiation on the upper face of the bar as it was fitted in the mill, but I would be interested to know if I'm right.

 

Alec

 

p.s. if you email tech@chainsawbars you get me anyway :001_smile:

Posted

Yes get some pics up and also some more info for instance:

 

 

  • When did you buy the bar?
  • How long have you used it for and is it mainly milling?
  • What chain type?
  • What woods?

 

 

And also it would be handy to see how you had it clamped to the Alaskan.

 

 

 

 

:001_smile:

Posted
It was more as a point of interest not a complaint.

 

We mill therefore things break, it goes with the territory.

 

I just wondered if anyone else had had bars crack on them.

 

Great attitude :thumbup1:

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

  •  

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

×
×
  • 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.