Rethread the timing cover oil feed banjo

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Hi Les,
thank you.
Please again, whath is the drill to use for the 5/16 x 22 tpi tap?
Piero
 
Hi.
Sorry but here is not possible to have 6,8 mm (in inch?).
Can i drill with 7mm?
Thank you.
Piero
 
Dommie Nator said:
If you are re-threading an existing hole why would you re-drill?
Hi.
Because i must weld a fractured line from which sprays oil.
And i fear that the alu welded will close a little bit the thread.
Thank you.
Piero
 
AHAAA!! This is exactly the kind of info that goes in to my forthcoming book: "All the threads in a Norton Commando engine".... :lol: The data is now saved!
Tommy
 
fiatfan said:
in to my forthcoming book: "All the threads in a Norton Commando engine"

You'll go mad before its finished !!?!!
And/or will have a seriously well restored Commando.

Tables of thread charts and drilling sizes are about, you'll need at least 10 of them to cover a Commando !
And I bet that still won't cover them all....

P.S. Dynodaves website sez "all the threads in Norton heads are Whitworth".
He obviously hasn't read your book....
Not entirely related here, but not disconnected either.
 
Rohan said:
P.S. Dynodaves website sez "all the threads in Norton heads are Whitworth".
He obviously hasn't read your book....
Not entirely related here, but not disconnected either.

ROHAN you are a jerk..... insult or FACT?

This is what my site says
THREADED HOLES-All the threaded holes on all aluminum heavy twin heads are whitworth form. There are 4 different threads.

All are whitworth form............see here:
http://atlanticgreen.com/nhth.htm

This is exotically an example of why the members of the M7 forum booted you off
Jerry/Lab how long do we have to put up with him?
Does the internet need a new proper Norton Heavy Twin forum? If I go, that's where I'm going
 
dynodave said:
ROHAN you are a jerk..... insult or FACT?

If you can't just discuss facts, what sort of "expert" are you ?
BSF is not Whitworth at all, and never has been, nor is it considered to be.
British Cycle Thread BSC the old CEI is certainly not Whitworth.

When I 'discussed' this with you about Model 7 iron heads and your webpage, you told me I was "wrong".

I see that someone modified Wiki to alter it to your 'facts', but it has since been corrected by someone who knows what they are talking out.

P.S. As I also pointed out to you, your claim that the early Model 7 iron head and alloy heads are the same is also not correct. They are different, in the finning. But we diverge...
 
BSW British Standard Whitworth
BSF British Standard Fine

BSF is the same form as BSW with the exception of pitch value being greater for the same diameter.

That's what they told me as an apprentice an it's worked in last 30+ years of standing in front of all kinds of lathes.
 
Rohan said:
L.A.B. said:
Not for long if he does something like that again. :roll:

So it is verboten to point out false news/info on this website ???

FALSE news yes [Edit: you can], Edit:not where the intention appears to be to provoke.

Nothing false about describing BSF as 'Whitworth form' as far as I'm aware and is not the same as saying it's "BSW/Whitworth".

https://en.wikipedia.org/wiki/British_Standard_Fine
BSF was developed by R. E. B. Crompton, and his assistant George Field.[1] BSF threads use the 55 degree Whitworth thread form. It was introduced by the British Engineering Standards Association in 1908

http://www.boltscience.com/pages/screw4.htm
The British Standard Fine (BSF) thread has the same profile as the BSW thread form but was used when a finer pitch was required for a given diameter.

https://www.collinsdictionary.com/dicti ... ine-thread
British Standard fine thread
a screw thread having a Whitworth profile but a finer pitch for a given diameter
 
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