Front shock absorber friction disc sizes

[agmatthews]

Hi All,

I'm at the point of assembling the front shock absorber on my '29 SWB chassis and have reached one of those "ummm?" moments.
The front shock absorber chassis mount has a 2 inch 'boss' on one side while the the friction discs I have all have a 1 1/2 inch hole in them. 
The discs fit the shock absorber arms perfectly but not the chassis mount. The cherished suppliers only seem to supply discs with one size hole - 1 1/2 inches.

Couple of questions:

• Is the 2 inch 'boss' on the front shock absorber chassis mount normal?
  
• Do I 'open up' one of the friction discs I have to 2 inches to fit, or is there a supplier for discs with large holes? 
  

Andrew
Melbourne, Australia

   
   

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[Ruairidh Dunford]

Big 7s have different sized parts here, from memory...

[Paul N-M]

Looks Big Seven to me.

Paul N-M

[agmatthews]

‘tis but a wee chummy, maybe one that had ideas of growing up one day!

Anyone think it’s a bad idea to open up the hole in the friction disc to get it to fit?

[Ruairidh Dunford]

May be easier to get a Seven one, they are readily available.

[Robert Foreman]

You could also bolt it back onto a fixture in a lathe and turn it down to the required diameter

[Derek Sheldon]

Ascertain the make up of the friction disc before you consider making the hole larger, some of these items have nasty stuff in them.