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Author Topic: Resurfacing clearances  (Read 1029 times)

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Dannywayoflife

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Resurfacing clearances
« on: December 13, 2011, 11:58:51 AM »
I decided to do some research into the clearances required to create the thick film fluid lubrication that resurfacing relies on for it's remarkably low wear and I came across this
http://www.orthopaediclist.com/images/uploaded/BHR%20Brochure%2020070323(1).pdf
Train hard fight easy
LBHR 10/11/2011 Mr Ronan Treacy Birmingham England
60mm cup 54mm head
Rbhr 54mm head 60mm cup 12/02/15 Ronan Treacy ROH Birmingham England
;)

dwbitt

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Re: Resurfacing clearances
« Reply #1 on: December 13, 2011, 12:27:04 PM »
Good find Danny!
Dave
LBHR, Dr. Su, 10/29/11

Dannywayoflife

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Re: Resurfacing clearances
« Reply #2 on: December 13, 2011, 01:03:40 PM »
I'm amassing quite a lot of data and info on resurfacing now. I have to admit prior to the op I did wonder why the tolerances of the bhr compared to other devices seemed loose I thought surely the tighter tge better but from what I've seen that too tight tolerances are one of tge reasons the asr failed. The more research I do on the bhr the more impressed I am with the design 
Train hard fight easy
LBHR 10/11/2011 Mr Ronan Treacy Birmingham England
60mm cup 54mm head
Rbhr 54mm head 60mm cup 12/02/15 Ronan Treacy ROH Birmingham England
;)

FlbrkMike

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Re: Resurfacing clearances
« Reply #3 on: December 13, 2011, 03:38:42 PM »
Interesting read Danny, thanks for posting.

I'm not one to split hairs (OK yes I am  ;D ), but I think you mean that too tight a clearance or "fit" could result in more wear.  The tolerance is how much deviation from the specified size or shape is allowable.  A "loose" tolerance could actually result in a "tighter" fit.
Dr. Ball
56 years old
LBHR 2/11/11
RBHR 3/11/11

Dannywayoflife

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Re: Resurfacing clearances
« Reply #4 on: December 13, 2011, 05:05:19 PM »
 :) you know what I ment mike.
Train hard fight easy
LBHR 10/11/2011 Mr Ronan Treacy Birmingham England
60mm cup 54mm head
Rbhr 54mm head 60mm cup 12/02/15 Ronan Treacy ROH Birmingham England
;)

FlbrkMike

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Re: Resurfacing clearances
« Reply #5 on: December 13, 2011, 05:26:45 PM »
Of course I do Danny.  I just can't help myself.

Probably comes from having two precocious kids who love to correct me at every turn.
Dr. Ball
56 years old
LBHR 2/11/11
RBHR 3/11/11

Dannywayoflife

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Re: Resurfacing clearances
« Reply #6 on: December 13, 2011, 06:20:14 PM »
Fair one mate! It seems as though before my op I couldn't really find much propper scientific data, I've found loads since my op!
I read recently that the c+ uses a sacrificial surface ie on side is softer than the other. I'm really interested in the whole subject now.
Train hard fight easy
LBHR 10/11/2011 Mr Ronan Treacy Birmingham England
60mm cup 54mm head
Rbhr 54mm head 60mm cup 12/02/15 Ronan Treacy ROH Birmingham England
;)

 

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