Crank-tap HVOF - spray.
05-07-2021, 06:49 AM,
#1
Crank-tap HVOF - spray.
Does anyone here already have experience or knows more about the well-known High Velocity Oxygen process for spraying parts.
I am a Flandria freak (may not belong here, but yes) and I sometimes have problems with run-in crank taps at the level of the bearing on the flywheel side.
I have had many original new old stock parts but the crankshaft department for certain types of engine blocks is running out.
Can this be a good solid alternative to save the original crankshaft to original sizes / bearing.
Near me there is a company called LMS in Elsloo.
Another option is to turn / grind the crank tap 1mm to an undersized bearing (there is and also the seal), but then the hardness is gone and the crank tap weaker of course.
I think the crank tap is only surface hardened.
Or is there another option, please get a response from the crankshaft specialists here on the forem.
Reply
05-07-2021, 01:36 PM, (This post was last modified: 05-07-2021, 02:09 PM by JeroenB.)
#2
RE: Crank-tap HVOF - spray.
Hey George,

If I understand correctly this is about reconditioning a shaft part for a bearing fit. I think this is one of the most recurring applications for HVOF coatings. We do at least 2-3 parts/week for this purpose. We are based in antwerp, you can find more details on https://www.amw.be. If you want to share more information (drawing, picture) or request a quotation you can send it to sales@amw.be.

But honestly I think any HVOF spray shop will be able to process your part.

The alternatives that I can think of are:
1. Flame spraying: this is a cheaper alternative and I wouldn't recommend it for parts turning at a high rpm/load due to the lower bond strength
2. Turning and choosing a lower size bearing but as you said this weakens the shaft
3. Laser cladding: this is a good technique that typically provides quality coatings but it induces more heat in your workpiece which might cause deformations (especially on parts that have been in service for a long time)

Good luck!

Best regards,
Jeroen
Reply




Possibly Related Threads…
Thread Author Replies Views Last Post
  Is it possible to spray powder established for gas based HVOF in Fluid HVOF system?? sreenuvundela 0 2,695 04-18-2016, 07:52 AM
Last Post: sreenuvundela



Users browsing this thread: 1 Guest(s)





Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd