Minimum depth for Stihl bar grooves

[AT sawyer]

Where would I find the minimum depth specs for the bar groove in Stihl chainsaws? I looked HARD in Stihl pubs for this answer and I can't find it. The Stihl tool used for lowering the depth gauges has a spur on the other end with gradations for measuring that depth, but I want to know the minimum specs are.

 

[ray benson]

Info out of Stihl Bar Chain manual.
Groove depth
As the rails wear the bar groove
becomes shallower. A minimum
depth must be maintained in order
to ensure that the drive link tangs do
not scrape along the bottom of the
groove, i.e. the cutters and tie
straps would no longer ride on the
rails:
Checking groove depth
ROLLOMATIC guide bars
Use the scale (groove cleaner) on a
filing gauge to check the groove
depth on the top and the bottom of
the guide bar.
DUROMATIC guide bars
Use the scale (groove cleaner) on a
filing gauge to check the groove
depth over its entire length.
If the measured depth is less than
specified, the guide bar must be
replaced.
Chain pitch Minimum groove
depth
1/4“ 5/32“ (4 mm)
3/8“ P 3/16“ (5 mm)
.325“ 1/4“ (6 mm)
3/8“ 1/4“ (6 mm)
.404“ 9/32“ (7 mm)

 

[Ozhoo]

 

[AT sawyer]

Thanks, that's exactly what I was looking for. My bars seem to be well within tolerance.