Advanced chain sharpening.

[Ty Korrigan]

I was taught this at Merrist Wood.

I don't always practice it mind.

I often file the tie strap but have yet to break a chain.

  Stuart

[kevinjohnsonmbe]

1 hour ago, Khriss said:

....in providing a non-answer you mean.

??

[billpierce]

Got my monies worth out of thissun

 

 

[Khriss]

Bar shagged as well k

[Khriss]

( and you need a new vice fr Christmas! )

[peatff]

And a new bulb for the workshop 

[Rough Hewn]

I know!  But as the photos show, the guide is marked as 3/8"P which is the chain (3/8" picco) the file size is marked on too, 4mm, and as you can see I checked with the digital caliper that is the file size fitted.
 
I agree it looks wrong though.  Looked ok for ages but got progressively more weird as the cutters got short.  Still cuts though, well in fact.
 
I have a second 2in1 for standard 3/8" chain, with 5.5mm files... Which seems to take more from the rakers and leaves a good cutter shape.... Although I've not done so much filing on those chains, they may get weird as they get short too perhaps.

3/8 should use a 5.2 mm file.
The 5.5 is for .404
Usually,
[emoji106]

[Ty Korrigan]

Bit daft really, 3/8 chain and 5.2mm file.

 I had a boss once who would say, "fetch me 2m of 4" by 2" "

Straddling the Imperial and metric worlds...

   Why are chains not metric damn it?

     Stuart

 

[AHPP]

"Ten mil, give or take ten thou."

 

I'm forever jumping between systems. I cut a bit of ply, "Twenty nine by five-five-five." the other week. Madness, I agree. My younger mates, especially a Lithuanian one, look at me like I'm a talking dog when I use feet and inches.

[difflock]

Bloody Yanks?

Probably like tyre sizes.

P.S.

I tend to use whichever system, metric or imperial, gives me the nearest "dead on" or easiest remembered measurement.

But for volumes of concrete it must be metric.