John McLaughlin wrote:

The oven cleaner takes a little longer - about 25 - 30 minutes, depending on
your patience. The gunk that didn't melt off scraped off easily with a
plastic scraper. Hosed it off with water, dried it and wd-40ed it. Maybe 45
minutes start to finish. Mine is pretty clean, but yours looks brand new!
John

Dale Smith wrote:

A long time ago, I seem to remember reading that glass bead blasting was
recommended to race prep connecting rods and "relieve internal stresses".  Is this
true?  or just another "hype"?
If true, it would be a plus in it's favor, but then again, the rotors don't fail
anyway, right?
Dale Smith

I am not sure they use glass beads for that. Some sort of blasting medium
is used to increase the fatigue life of metals. As I recall it is called
shot peening.

I don't think anybody has ever broken a rotor. Sure, if an apex seal breaks
it can put some big gouges in the rotor however.
Paul Lamar

Blake Mantel wrote:

Hi all!

Shot peening is a process that uses hardened steel shot (mostly...) that impacts upon
the surfaces of the part being processed.
This produces a compression to the external metal crystals and relieves some of the
strain induced by production.

Actual aerospace process has test strips alongside of the part being peened
(standardized thickness and hardness - kept with the part as a permanent record) and the
deformation is measured to ensure proper shot peening has occurred.

Paul you should be able to glass peen for a long time with the same beads if you are
very careful and limit your nozzle pressure. But due to the possibility if glass
retention I am not a great fan of this process. But it can be made to work with proper
inspection.

I worked for a while doing inspection and balancing of turbine and space components, so
shot peening was standard practice to all components.

Blake

 
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