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Miniature Engineering...
or - solving the lost letter problem!

How can this relate to TR's ?
It probably doesn't .... but it was the only thing I could come up with when pondering on an article that deals with very fine thread sizes and a bit of delicate engineering. What this article is really about is how to reclaim those damaged letters which spell out TRIUMPH on the front of TR3's, plus a better way to attach the apron medallion.
First the letters:
- these were designed to be attached by means of nasty things called "push-on fixes" (at least, that's what they are called by the Rageem Fastener Co. - 02-599 3132 who make them and numerous other types of clips).
The trouble is that the pin which is embedded in the letter suffers damage when the clip is repeatedly fitted and prised off. The pin is also metallurgically pathetic !
Anyway, the letters on my 3A had broken pins and others that were clearly ready to break. I wanted to replace them with threaded fastenings having tiny nuts on them so that I could easily place and remove the letters.

This is what I did:

It's fiddly, but the final product is worthwhile and it may help to salvage old letters.

Where to get the bits:
6BA bolts, nuts and taps: try model engineering suppliers and hobby shops. Railway modellers use this stuff. Otherwise try:
HUCAR
1 Copeland Ave Penrith.
047 - 31 3950
Pin Vice - again try model suppliers or electronic stores such as Dick Smith, Jaycar etc. as they are used to hold PCB drills.

Second - the Apron Medallion.

These are held on with the same dopey clip arrangement and are very difficult to fit when the car is completely assembled.
Try carefully tapering the end of the brass mounting pins so that you can start a 3/16" UNF die to cut a thread on each pin.
This whole operation needs to be done CAREFULLY and with VERY LITTLE FORCE. These pins would seem to be silver soldered in place so be gentle - I accept no responsibility for damaged medallions. None the less, it worked very well for me and the medallion can now be easily removed and replaced.
I filed the pin so that the die cut fairly easily. It was easier to hold the die with a pair of vice grips on end as the curve of the badge precludes use of a normal die holder. Use a sharp die and a little lubricant, reversing the die frequently to clear chips.
I have only threaded the pin for 1/4" of its length and have used nyloc nuts with a tap washer or O ring as a spacer.

Good Luck .... Rick Fletcher

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