Gauging Bar Groove Wear?

[Gypo Logger]

Well, I took my own advice and went out and measured everything. The drivers on a new chain measure in at .062" The bar groove width measures with a caliper at .075-.080". So the clearance (slop) is about .013-.018". Are there any bar specs that would set a limit to this?

Thanks,

Steve

Oregon states that 8 thou is the allowable tolerance.
Its interesting to note that most saw racers use 1.3 chain in 1.5 bars.

 

[Philbert]

The BRC is a last resort if a larger gauge driver won't fit. The BRC pinches in the rails and not always evenly, so after using the BRC I use a stihl bar rail spreader.

'bar rail spreader' = 'screwdriver?

Philbert

 

[Gypo Logger]

'bar rail spreader' = 'screwdriver?

Philbert

It's a stihl tool not sure of the part # but they come in 050, 058 and 063.

 

[old-cat]

If I recall right, the clearance in the STIHL ES Light bar is .012" brand new.

 

[Philbert]

It's a stihl tool not sure of the part # but they come in 050, 058 and 063.

Photos?

Thanks.

Philbert

 

[SawTroll]

If I recall right, the clearance in the STIHL ES Light bar is .012" brand new.

A way to cheat on the weight!

 

[BeatCJ]

I tried this test with a new chain and the bar is at the end of its useful life. There is a small amount of daylight under the straightedge at the front of the cutter but none at the sharpening indicator at the back of the cutter.

Any suggestions for good aftermarket bars for a Stihl 028AV? Carlton? Forrester? Cheapest place to get them?

I just got a bar from this thread for quite a bit less than I could get a bar at my local Stihl dealer. NOS Stihl Mount Bars
Then I went and got the chain locally. Jon1212 was good to deal with.