"Mike Marlow" wrote in message
...
Jim Wilkins wrote:

What is the tolerance for hydraulic spool valves?

You forced me to look that one up. A quick look seems to indicate
that tolerances are around 5 ten thousanths of an inch.
-Mike-

I did too. The last post claims .000025" to .000040" clearance for
aircraft valves.
http://www.practicalmachinist.com/vb...arance-232520/

jsw