Polishing Your Rocket

Discussion in 'Powerhouse Motorcycles' started by POWERHOUSE, Jun 12, 2017.


  1. POWERHOUSE

    POWERHOUSE Frank Site Sponsor Registered

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    A lot of effort can go into improving our bikes, like porting and polishing cylinder heads, polishing engine covers and frames, etc. Something often overlooked engine-wise is the transmission. POWERHOUSE has done several transmissions using a process called "Isotropic Superfinishing", more commonly know as "micropolishing", with great results.

    This is actually not a polishing process, but rather a finishing process. There are two steps involved: the first step is to Cryogenically process the gears, the second step in the process involves Isotropic Superfinishing using chemicals. Here is how it works:

    Cryogenic treatment: we all know residual stresses exist in all types of parts from engines to tooling; this stress is introduced into the part at the time of manufacture. Casting, forging, heat treating or machining can create stresses that cause an invisible random grain pattern; these same parts expand from heat generated through operation, and the retained stresses cause uneven expansion and dimensional instability. The result is increased wear and decreased performance. Deep Cryogenic temperatures are required to effect a complete molecular change, giving a more uniform grain structure. Large quantities of very fine carbides develop uniformly throughout the part.

    For centuries heat treating has been used to transform steel to a more durable state. Heating, then rapidly cooling. This results in a harder and more wear resistant part. This has to do with changing the internal "matrix" of the metal. Cryogenics is a more thorough process that extends this idea and results in better wear characteristics due to an even denser structure. This reduces stress, fatigue, friction, heat and wear. It is a one time process - not a coating or surface treatment that can be machined away. It will not make the component more brittle or change it's physical size. Cryogenics was first put to use by NASA in the mid sixties after they found out that deep space exploration vehicles had improved structural integrity after being exposed to cryogenic temperatures for a long period of time. The "realignment" of molecules enhances performance, making parts more resistant to wear and breakage. Cryogenic thermal cycling finishes what heat treatment started.

    ISP: the second step is not a polishing process, but rather a finishing process. There are two steps in this one - the refinement process, where a soft, thin (one micron) film is formed on the surface of the part. The part is then put into a special "vibratory" bowl with ceramic media, where the two interact. During this interaction the film is physically removed from the "peaks" of the processed part and the "valleys" are unaffected. The process is repeated several times and the peaks are removed, leaving only the valleys, producing the improved micro finish. Then the "burnish" process is done, where a mild alkaline mixture is introduced. After a short period of time a polished, chrome-like finish is produced, and all traces of film formation are removed.

    Benefits: reduced friction, vibration and noise; improved and smoother shifting; longer life; more power to the rear wheel, along with a reduction in lubricant temperature. And a bullet proof transmission. Customers who have had this done love it. A Busa transmission would cost $325 for this procedure.

    Hope this explanation wasn't too long, thanks for listening, class dismissed!

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    Jake whitebird and sixpack577 like this.
  2. RedBull

    RedBull Registered

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    Red
    Nice !
     
  3. Kiwi Rider

    Kiwi Rider Registered

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    Greg
    Where do I sign?
     
  4. POWERHOUSE

    POWERHOUSE Frank Site Sponsor Registered

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    Send your transmission directly to me here at POWERHOUSE. We can also undercut and send it back with heavy duty or even ceramic bearings, whatever you like, just let me know . . .:banana:
     
  5. michael parris heuberger

    michael parris heuberger Registered

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    Hi frank. Great post. You will be doing my trans too. Does Robinson industries a performance coating too? Do you use any on your motors? Like from Swain tec or Calico or Zircote. like on the turbo & piping. Calico & Swain will also do pistons & piston skirts cams valves valve springs & most of the motor too. Even the radiator to help get ride of heat ! They also offer coatings for the crank & rods to help shed oil.
     
  6. michael parris heuberger

    michael parris heuberger Registered

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  7. michael parris heuberger

    michael parris heuberger Registered

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    Hi Frank does Robinsons do the cryo in house or send it out? I am going ever part of the motor. they also cryo brake rotors too The place I will use is in Worcester Ma. It is Nitro Freeze.
     

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