[Tigers] Front Hubs

[Tom Witt]

MessageI spent some time about 13 years ago getting a fair amount of input from the list on the rotor thickness.  If I recall correctly most said there was no Rootes published minimum.  Someone did send me information stating that .375 was the minimum (below).  

“The new rotors are .500 inch and the minimum is .375 inch.  The data came from a factory service bulletin.  Hope this helps.”  Dan

.375 seems an awfully large amount out of a stated .500 rotor. If it matters I had my rotors turned and of the four I had done they were in the .435-.460 range. I had a hard time finding someone to turn the rotors being they had no actual number in their database (or on the rotor) to work from. I eventually found a Triumph guy at Pep Boys who was willing to turn them as long as I stated on the invoice that the .375 was provided by me. Initially I was only going to get one set turned, but when I finally found someone to turn them I dashed home and got the other set too - not wanting to miss the opportunity.
From: Jerry Mo Christopherson via Tigers 
Sent: Sunday, September 13, 2015 9:23 AM
To: rfraser at bluefrog.com 
Cc: tigers at Autox.Team.Net 
Subject: Re: [Tigers] Front Hubs

Speaking of hubs and in particular the discs.  Assuming the original thickness being around ½”, just how far can one go when turning our discs down??  I have never seen any stampings on a disc to say what the “limit” is.   Just curious.

 

Jerry Christopherson

9473187

TAC Ins. 58

 

 

From: Tigers [mailto:tigers-bounces at autox.team.net] On Behalf Of Ron Fraser via Tigers
Sent: Sunday, September 13, 2015 7:46 AM
To: 'michael king'; 'Tod Brown'
Cc: tigers at Autox.Team.Net
Subject: Re: [Tigers] Front Hubs

 

Every part has allowable manufacturing tolerance specified on the print.

 

I believe the brake discs should be about 1/2" thick but I don't know the tolerance for the max thickness or the diameter.  The caliper opening, caliper position and the thickness of the brake pads govern the max thickness and diameter of the disc.

 

The hub could be a different story.   It is very possible the mould cavity for that hub was at end of life with the tolerances maxed out or even greater.   Rootes was also near end of life so a deviation was probably signed off to accept these out of spec parts.  This is only a possible explanation.   We would need Corporate record to know the real truth.

 

Most likely that hub has some extra metal at the center hub that can be machine down to fit that Mag.

 

Ron Fraser

  -----Original Message-----
  From: Tigers [mailto:tigers-bounces at autox.team.net] On Behalf Of michael king via Tigers
  Sent: Sunday, September 13, 2015 1:45 AM
  To: Tod Brown
  Cc: Tiger Talk List Tiger
  Subject: Re: [Tigers] Front Hubs

  The disc thickness will be weak, the size if disc is odd.  Should be same diameter on series 3-v alpine and tiger.

  As for hubs same on all alpines on front.... Maybe running wrong grease cap? 

  On 13 Sep 2015 14:29, "Tod Brown via Tigers" <tigers at autox.team.net> wrote:

  Hello All:

  The other day, a friend who owns a Tiger II found that one of his pie mags would not 
  fit on one of the front hubs. In trying to figure out why, we took a hub off a Series V
  Alpine that we have been dismantling and found that the mag would fit on that hub
  very easily. I would have thought that the hubs used on the Tiger II's and the Series V
  Alpines were the same and, as far as I can find, there is only one part number on the
  Parts List, but they are slightly different. Can anyone offer any insight into this situation?

  We also noticed that the brake discs on the Tiger II and the Alpine V were different, with
  the Tiger disc being thicker but slightly smaller in diameter than those on the Alpine.

  Are these just ordinary variations in manufactured parts of is there some other
  explanation?

  Thanks,

  Tod
  B382002384LRXFE
  TAC 864


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