advice for a noobie chainsaw user

[Eddy_t]

Right, found some info, what's hrc54 mean?

 

 

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[Daniël Bos]

Right, found some info, what's hrc54 mean?

 

 

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It's a measure of hardness on the Rockwell scale, higher number=Harder steel.

 

http://en.m.wikipedia.org/wiki/Rockwell_scale

[chrismechanic]

It's a measure of hardness on the Rockwell scale, higher number=Harder steel.

 

Rockwell scale - Wikipedia, the free encyclopedia

 

ya.. thats the one, i found out you can get certain drill bits to drill hardened steels (even tool steel) but.. they are very expensive and also very brittle.

 

they would have to be mounted in a ridgid setup with power feed, the feed and cutting speeds are crucial to making the cut work.

 

sounds like a job for a machine shop there eddy..

chris

[wyk]

hrc54 is harder than the drive links on chainsaw chains.

[chrismechanic]

metal is on its way to you eddy.. just got back from post office

chris

[Eddy_t]

hrc54 is harder than the drive links on chainsaw chains.

 

At least the bar will last a fair few chains

 

 

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[Eddy_t]

metal is on its way to you eddy.. just got back from post office

chris

 

Pm me the cost and your PayPal address then mate

 

 

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[chrismechanic]

'ere Chris, you don't happen to have any experience of machining 2 stroke motorbike heads do you? I've got one that eventully I want a bit skimming off the squish area - partly to lower compression but also to lose some damage too. Just need to find a grown up who knows more about how much/angle to take than I do

 

sorry chris, i missed this post somehow.. im sure i can help, post some pics?

my lathe can turn up to 9" diameter.

chris

[chrismechanic]

At least the bar will last a fair few chains

 

 

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more like 30 or 40 the cutting teeth on the chain would be harder than the links, the links are probably just mild steel.

chris

[Chris Sheppard]

sorry chris, i missed this post somehow.. im sure i can help, post some pics?

my lathe can turn up to 9" diameter.

chris

 

Cool It's something I need to get done eventually, but it's still running something like as it is. Think it must have had something like a bit of ring bouncing round in there at some point.

 

What I'd like to try and do is take some of the damage out and reduce compression slightly at the same time so as to calm the power slightly (250 motocross bike pretending to be an enduro bike) without having to resort to adding an extra base gasket.

 

I just need to work out how much to take off and what angle for it to still run something like - that's proving the hard bit