On May 14, 2:33*pm, "PrecisionmachinisT"
wrote:
"ATP" wrote in message

...

Chains should be sharpened every time you use them.

Debatable.

Taking them to a pro after several sharpenings might make sense.

Or use some sort of a jig so as to correct any cumulative filing errors.

The right size round file will get it done in about five minutes.

Rocks and dirt are basically an instant death sentence--avoid like the
Plague and you'll likely get at least a couple hours worth of productive
cutting time between touch-ups.

Here's the jig:
http://www.northerntool.com/shop/too...8557_200308557
Oregon has something similar, patents have long run out.

My dad got one very similar only with "Sears Craftsman" cast in, used
it for 30 years. Sharpening can be done on a stump out in the field,
no juice needed. Takes more than 5 minutes, though, to get both
directions on the teeth and get the depth gauges. Just depends on the
length of the bar.

Worst thing to hit other than nails and barbed wire is a ceramic
electric fence insulator, a lot of farmers just nailed them to trees
along the properly line and they got embedded. 30-40 years later,
they're in there but unseen and not detectable. New chain time after
hitting one.

Stan