speedo drive thread

lowact · Post by **lowact** » Sun Jun 09, 2024 5:06 am

Did I just learn something? Struggling to figure out the thread on the ¾ inch speedo drive from the gearbox – that the right-angle drive screws onto. 27 tpi is too fine, 1 mm is too coarse. Thanks to AI assisted searching I now know about BSB (british std brass) threads, 26 tpi across the range…

abowie · Post by **abowie** » Sun Jun 09, 2024 10:49 pm

What's the diameter of the thread on the speedo drive?

You can buy Brass taps and dies on Ebay; they all come from India.

https://www.ebay.com.au/sch/i.html?_fro ... =0&_sop=16

lowact · Post by **lowact** » Thu Jun 13, 2024 2:54 pm

3/4. Already ordered (from India), last bastion of all things British?

abowie · Post by **abowie** » Thu Jun 13, 2024 9:52 pm

lowact wrote: ↑
Thu Jun 13, 2024 2:54 pm
3/4. Already ordered (from India), last bastion of all things British?

I have bought a number of small machining bits and pieces from India via Ebay.

They've all been pretty good.

rossco_j · Post by **rossco_j** » Tue Jun 18, 2024 2:55 am

I agree Andrew, I bought some “eyebrows” for the A30 from India. Very good quality.

abowie · Post by **abowie** » Tue Jun 18, 2024 5:21 am

rossco_j wrote: ↑
Tue Jun 18, 2024 2:55 am
I agree Andrew, I bought some “eyebrows” for the A30 from India. Very good quality.

I admit to being a bit jealous.

Back in the day I wrecked an A40 Farina for the nuts and bolts. I wish I'd kept it to race.

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