Projects At Home During Lockdown

**Grumph** · 29th April 2020, 16:21

Originally Posted by HenryDorsetCase

Presumably the 100year old walnut will produce some lovely timber. It should keep the interior of a few Jaaaaags and Rolls Royces sorted.

Here's the actual other side of the metal thingy I found in my oil pickup. It seems clear it has broken out of somewhere.

See my previous post. I owe you for the carb bits anyway. Someone's hammered on a gearbox shaft - probably to get the sprocket bolt off - and broken that bit of casting out.

Your call as to how far you go with it. If you want to freshen up the bores, the cases have to come apart anyway. That damage is fixable.

**Kickaha** · 29th April 2020, 17:24

Originally Posted by timg

Love it! Yeah, he is about that old!

I dunno, I reckon he could pass for it

**ellipsis** · 29th April 2020, 17:26

Originally Posted by timg

Love it! Yeah, he is about that old!

...Oi!...last time I looked you were about my age...just more handsome...well, you have all your teeth anyway...

**Grumph** · 29th April 2020, 19:25

Mere children, all of youse.

I wasn't going to make an arm for the frame I'm building, I have a pre-unit Triumph arm here that I was going to use. It's a 50's replica project so that was age-appropriate.
But it' s too wide at the pivot once bearing carriers are inserted, assymetric - and bloody heavy. So an arm is being made.
I was able today to blag my way onto a press - keeping social distancing and wiping it down afterwards.....To form the ends of the fork legs. I have a die setup I've used several times before.
Then it was haul out my last pair of lasercut fork ends - made for 15mm axles - and open them up to suit the Triumph axle setup. .675 inch
Now this size is not uncommon on old Brit stuff - I was using an AMC front axle as a go/not go gauge - but WTF, it doesn't equate to anything in fractions or metric.

Anyone got any theories as to why this size is used ? Nev ?

**F5 Dave** · 29th April 2020, 21:02

So they could Serendipiously use that number for the capacity of my current roadbike many many years later.

**pete376403** · 29th April 2020, 22:22

Originally Posted by Grumph

Mere children, all of youse.

I wasn't going to make an arm for the frame I'm building, I have a pre-unit Triumph arm here that I was going to use. It's a 50's replica project so that was age-appropriate.
But it' s too wide at the pivot once bearing carriers are inserted, assymetric - and bloody heavy. So an arm is being made.
I was able today to blag my way onto a press - keeping social distancing and wiping it down afterwards.....To form the ends of the fork legs. I have a die setup I've used several times before.
Then it was haul out my last pair of lasercut fork ends - made for 15mm axles - and open them up to suit the Triumph axle setup. .675 inch
Now this size is not uncommon on old Brit stuff - I was using an AMC front axle as a go/not go gauge - but WTF, it doesn't equate to anything in fractions or metric.

Anyone got any theories as to why this size is used ? Nev ?

Brtitsh Standard Cycle thread?
BSC (British Standard Cycle) Thread Data
Diameter (Inches) Threads per inch Tapping Drill Size
0.125 (1/8th) inch 40 Tpi Number Drill 39 0.1004 inch 2.5mm
0.625 (5/8) inch 26 Tpi 0.5906 inch 15 mm
0.6875 (11/16) inch 26 Tpi 0.6496 inch 16.5 mm
1 inch 26 Tpi 0.9688 (31/32) inch 24.61.1 mm

**Grumph** · 30th April 2020, 06:35

Originally Posted by pete376403

Brtitsh Standard Cycle thread?
BSC (British Standard Cycle) Thread Data
Diameter (Inches) Threads per inch Tapping Drill Size
0.125 (1/8th) inch 40 Tpi Number Drill 39 0.1004 inch 2.5mm
0.625 (5/8) inch 26 Tpi 0.5906 inch 15 mm
0.6875 (11/16) inch 26 Tpi 0.6496 inch 16.5 mm
1 inch 26 Tpi 0.9688 (31/32) inch 24.61.1 mm

The practise probably does go back to pushbike origins. The .675 is plain shaft size - often with a 5/8 thread on the end where it's an axle.
Not dissimilar to the common Jap medium/lightweight practise of a 14mm thread on the end of a 15mm axle.

But they did make it difficult for themselves with the odd size. 5/8 thread on an 11/16 axle would have been so much easier. Poms eh...

**swarfie** · 30th April 2020, 06:43

Originally Posted by Grumph

Mere children, all of youse.

I wasn't going to make an arm for the frame I'm building, I have a pre-unit Triumph arm here that I was going to use. It's a 50's replica project so that was age-appropriate.
But it' s too wide at the pivot once bearing carriers are inserted, assymetric - and bloody heavy. So an arm is being made.
I was able today to blag my way onto a press - keeping social distancing and wiping it down afterwards.....To form the ends of the fork legs. I have a die setup I've used several times before.
Then it was haul out my last pair of lasercut fork ends - made for 15mm axles - and open them up to suit the Triumph axle setup. .675 inch
Now this size is not uncommon on old Brit stuff - I was using an AMC front axle as a go/not go gauge - but WTF, it doesn't equate to anything in fractions or metric.

Anyone got any theories as to why this size is used ? Nev ?

Hmmmmmm…. 43/64" is 0.672 so 3 thou under. So that's what it'll be but fuck knows why. Sorry Greg, not a bloody clue why they'd have used such an oddball size. I assume it is 26 TPI so would be cycle thread. Oh hang on, are the bearing sizes 11/16"? Maybe just a step down on the bearing size so they slide over the thread without touching them, but why only 1/64" I don't know. As we all know the Poms did some silly shit.

**swarfie** · 30th April 2020, 06:46

Originally Posted by Grumph

The practise probably does go back to pushbike origins. The .675 is plain shaft size - often with a 5/8 thread on the end where it's an axle.
Not dissimilar to the common Jap medium/lightweight practise of a 14mm thread on the end of a 15mm axle.

But they did make it difficult for themselves with the odd size. 5/8 thread on an 11/16 axle would have been so much easier. Poms eh...

Haha. Just saw your post. Two great minds think alike eh

**timg** · 30th April 2020, 07:54

Originally Posted by ellipsis

...Oi!...last time I looked you were about my age...just more handsome...well, you have all your teeth anyway...

Correct on every count

**sidecar bob** · 30th April 2020, 08:32

Originally Posted by swarfie

As we all know the Poms did some silly shit.

They still do, Watch an episode of Jeremey Kyle,

**swarfie** · 30th April 2020, 09:19

Originally Posted by sidecar bob

They still do, Watch an episode of Jeremey Kyle,

I had to google him as I didn't have a clue who he was. Mate, you seriously have too much time on your hands

**sidecar bob** · 30th April 2020, 09:30

Originally Posted by swarfie

I had to google him as I didn't have a clue who he was. Mate, you seriously have too much time on your hands

If you want to see some serious retardation it's the place to go.
I wouldn't have believed there were enough crack head inbred's screwing their sons girlfriend, or their cousin to make a TV series about it.