Do I need a Whitworth? Who's Whitworth?

Status
Not open for further replies.
Joined
Jul 20, 2009
Messages
217
Country flag
I need to remove the alternator rotor nut and the book calls for a 1/2" Whitworth. Is there any workaround, short of using an adjustable wrench? BTW, where are they measuring this 1/2" Are they talking about the drive? The nut is larger than 7/8" standard. I'd like to get ahold of this Whitworth guy! :evil:
 

grandpaul

VIP MEMBER
Joined
Jan 15, 2008
Messages
12,505
Country flag
Whitworth fasteners are measured (generally) by the diameter of the threaded portion of the fastener.

Wierd? Yep.
 

Flo

Joined
Aug 4, 2009
Messages
777
Blimey, you youngsters. That's when threads were threads & men were men.
 
Joined
Dec 30, 2008
Messages
981
Country flag
As Ludwig has said try metric sockets, they seem to be a tighter fit .
worked well for me
 
Joined
May 19, 2009
Messages
271
Country flag
You can buy them but then you usually have to grind on them to make them fit because of what surrounds the bolt or nut. Too bad Norton didn't have their own whitworth wrenches and sockets made so they would work in all the close places. Commando kit, Atlas kit etc.
 
Joined
Jan 27, 2008
Messages
1,607
Country flag
Whitworth was the first guy to standardize nuts and bolts. A lot of thought was involved, figuring out the optimum head size for different bolt diameters.

His system sized the tools to fit the head of the bolt diameter listed on the tool. So a 5/16" Whitworth socket fit the head of a 5/16" bolt. This system was modified slightly to become the British Standard (BS). BS used a smaller head than Whitworth, so a 5/16" Whitworth became a 3/8" BS. Most British industry phased out Whitworth/BS in favor of SAE or Metric in the 60s. On the Norton, pretty much the only Whitworth fittings are those that were developed before the phasing out of Whitworth.
 
Joined
Mar 13, 2005
Messages
54
BillT said:
Whitworth was the first guy to standardize nuts and bolts. A lot of thought was involved, figuring out the optimum head size for different bolt diameters.

His system sized the tools to fit the head of the bolt diameter listed on the tool. So a 5/16" Whitworth socket fit the head of a 5/16" bolt. This system was modified slightly to become the British Standard (BS). BS used a smaller head than Whitworth, so a 5/16" Whitworth became a 3/8" BS. Most British industry phased out Whitworth/BS in favor of SAE or Metric in the 60s. On the Norton, pretty much the only Whitworth fittings are those that were developed before the phasing out of Whitworth.

You'll find that later wrenches are marked up with two sizes BSW & BSF, have a peep at this


http://www.timebus.co.uk/rlh/whitworth.htm


Though as an apprentice I was told that In WW2 the nut sizes were standardised to the smaller size, so 1/2" BSW& 1/2" BSF would have been the same, I never found any evidence of this and may well have been spun a line!
 

maylar

VIP MEMBER
Joined
May 13, 2007
Messages
4,205
Country flag
I'm sure I've always used 7/8" for the alternator nut. The only Whitworths that get regular use on my MKII are 3/16, 1/4 and 5/16W.
 
Joined
Aug 14, 2006
Messages
1,451
Country flag
During my rebuild I found that a 14mm open ended wrench was my best friend. I used that more than any SAE wrench.
 

grandpaul

VIP MEMBER
Joined
Jan 15, 2008
Messages
12,505
Country flag
14mm & 7/16" SAE are useful tools, indeed (as is the classic "combo" 13mm / 12")
 
Joined
Oct 23, 2009
Messages
159
Country flag
BSF ?
Ah yes, as I was told as a boy, British standard fred (in a cockney accent) :lol:
 
Joined
Mar 13, 2005
Messages
54
Myford said:
BSF ?
Ah yes, as I was told as a boy, British standard fred (in a cockney accent) :lol:

lol :D I was taught british standard wide and british standard fin (thin)
 
Joined
Jul 20, 2009
Messages
217
Country flag
L.A.B. said:
Bonwit said:
I'd like to get ahold of this Whitworth guy!

And shake his hand, I would hope?
I humbly apologize for disparaging the Whitworth name. Whitworth, you rock! Even has his own society site. He needs a Facebook page. :p
 
Joined
Feb 28, 2009
Messages
546
Country flag
Ever heard of "METWRENCH" socket & spanner sets? These are brilliant to say the least, they fit Metric, SAE, Whitwhorth & rounded off Nuts etc! Being a farmer( when it rains here in OZ!) I do all my own maintenance on 4wd tractors, trucks, harvesters, aeroplanes, motorbikes of various makes etc, I find these to be a good quality robust tool! They drive of the walls and not the corners elliminating the chances of rounding off and stuffen things up. Come in a good moulded plastic case aswell. There not Snapon but just as good and probably 1/4 the price, Highly reccomended!
regards Foxy
 
Joined
Oct 31, 2009
Messages
5,193
Country flag
I have done everything except splitting the cases on my 72Commando. Between the metrics and the SAE I have gotten away with out Whitworth tool. I have however made mods to a 9/16 open end for cylinder base nuts. I found 6 rather than 12 point wrenches usfull. That being said, I still wish I had a full set with a tap and die set to match.

72 Commando 200xxx
Combat Head with compression plate
1.5" big bore exhaust
36mm Mikuni
 
Joined
Feb 21, 2005
Messages
238
I have however made mods to a 9/16 open end for cylinder base nuts
:evil:

I was just cursing those very nuts just yesterday......anybody else ever grind the nut head ever so slightly to fit a 9/16"?

i'm sure I'm speaking heresy here... but if you wet grind so as not to lose any temper, why not ?
 
Status
Not open for further replies.
Top