Britbike forum

Classic British SparesKlempf British PartsBaxter CycleThe Bonneville ShopLowbrow CustomsGirling Classic MotorcycleLucas Classic MotorcycleHepolite PistonsIndustrial tec supplyJob Cycle

Upgrade your membership to Premium Membership or Gold Membership or even Benefactor


New Sponsor post
Triumph 650/750 High-Output Alternator Kit
by The Bonneville Shop - 01/13/23 11:29 pm
New FAQ post
Missing edit button
by wrench136 - 05/30/22 2:57 pm
News & Announcements
Premium members! 🌟
by Morgan aka admin - 01/31/23 2:14 pm
Buy BritBike staff a coffee ☕️ or pint 🍺
by Morgan aka admin - 01/15/23 9:29 am
Benefactor ✅
by Morgan aka admin - 01/08/23 8:38 pm
Gold members! ⭐️ ⭐️ ⭐️
by Morgan aka admin - 01/03/23 6:30 pm
How to guides - Technical articles
British Fasteners Specs
by Morgan aka admin - 01/03/23 1:29 pm
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Member Spotlight
AussieDerek
AussieDerek
Wangi Wangi, NSW, Australia
Posts: 25
Joined: November 2022
Top Posters(30 Days)
Lannis 77
DavidP 74
Top Likes Received (30 Days)
Kev. 36
DavidP 25
Newest Members
BSA A65 rebuild, Dan Haggard, Padsdad, sam keller, Raz
12,386 Registered Users
Forum Statistics
Forums35
Topics76,525
Posts783,968
Members12,386
Most Online204
Jul 10th, 2022
Random Gallery photo
Photo posting tutorial

Previous Thread
Next Thread
Print Thread
#878176 04/20/22 5:07 pm
Joined: Mar 2005
Posts: 10,851
Likes: 280
Britbike forum member
OP Offline
Britbike forum member
Joined: Mar 2005
Posts: 10,851
Likes: 280
In the last issue of Vintage Bike I wrote a missive about the changes that came about when the BSA group started to use computers.

Well this week I ran into a new one. The Triumph number for the Rigid axle was TS42. Now anyone working with Triumph part numbers is familar with the numeric interchange numbers to translate the alpha prefix part numbers. S becomes 21, F becomes 82, E becomes 70 and so on.

Well 57 becomes T. So in someones creativity we have a new Triumph part number for a rigid axle nut. It started as TS42. It has now morphed into 57-0542. It makes sense to someone.

Triumphs on eBay
Joined: Mar 2005
Posts: 10,851
Likes: 280
Britbike forum member
OP Offline
Britbike forum member
Joined: Mar 2005
Posts: 10,851
Likes: 280
I am with you up to the S. In the old fonts the "S" just simply looks like a "5" and where you only have three digits after the dash you add the zero.

Now if you search some of the Triumph parts lists on line you will find the 57-0542 Rigid Axle nut.

We have actually added 57-0542 to our computer with a use TS42.

Now if Harris makes this nut will he make up a 99- series number?

A good Triumph parts man is worth his weight in Castrol R.

Joined: Feb 2008
Posts: 6,336
Likes: 626
Britbike forum member
Offline
Britbike forum member
Joined: Feb 2008
Posts: 6,336
Likes: 626
I think that you have to put this in the context of the industry at the time it was first given that part #.
I ran a pretty big engineering department at a company about 5 miles from Meriden during the 60s and 70s.
The experienced designers drew up the parts.
The parts lists were regarded as the lowest job of the low and were left to apprentices to compile.
I would bet $50 that what happened is that what should have been a "5" looked like an "S" and this produced TS42.
The apprentice was probably hung over from the previous nights drinking or day dreaming of what he was intending to do to his girl friend that coming evening.
My advice--- don't trust the parts drawings or the parts lists too much--remember the circumstances under which they were compiled.

Joined: Oct 2006
Posts: 4,971
Likes: 226
Britbike forum member
Offline
Britbike forum member
Joined: Oct 2006
Posts: 4,971
Likes: 226
Hand-printed "5" and "S" are easily confused. I've made the mistake in my own handwriting.

As to parts lists: I have made my own corrections to them a number of times over the years.

Joined: Mar 2006
Posts: 5,538
Likes: 98
Britbike forum member
Offline
Britbike forum member
Joined: Mar 2006
Posts: 5,538
Likes: 98
Why specifically TS?

What about NW, GE, WE, PO, PT, NT, (etc.etc.) prefix part numbers?

Originally Posted by Tridentman
I would bet $50 that what happened is that what should have been a "5" looked like an "S" and this produced TS42.



Edit:
https://www.jrcengineering.com/wp-content/uploads/2015/09/TRI-PU-1950.pdf
p.35
[Linked Image from i.postimg.cc]

1 member likes this: reverb
Joined: Nov 2002
Posts: 925
Likes: 25
Britbike forum member
Offline
Britbike forum member
Joined: Nov 2002
Posts: 925
Likes: 25
Also, pre-war parts had a two letter prefix before the familiar F, T, E, W etc numbers came into use in the late 30s. Those still in use by about 1970 had new BSA type part numbers allocated eg collet WE259A became 71-3748. Footrest rubbers NF704 became 82-9279. I haven't checked a pre-war parts book but I think TS42 would be the original part number. The later number has been wrongly transcribed at some point.


1958 5TA / T100
1967 T120R
1969 TR6C
1970 TR6C

Moderated by  John Healy 

Link Copied to Clipboard
British Cycle SupplyMorries PlaceKlempf British PartsBSA Unit SinglesPodtronicVintage MagazineBritBike SponsorBritish Tools & FastenersBritBike Sponsor






© 1996-2023 britbike.com
Powered by UBB.threads™ PHP Forum Software 7.7.5