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#Post#: 7713--------------------------------------------------
Re: 1932 Strupp Miller Special
By: Jimr1999 Date: October 9, 2022, 6:07 am
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I have been kindly given two spring stacks from a Morris eight
that are 1 1/2" wide. I am intending on using three leaves as
quarter ellipticals so I have to cut them and drill them. One of
the old boys from work has suggested cutting them in a shallow
water bath and drilling them at high feed pressure low speed
with cobalt bits.
The remaining unused leaf section is long enough to drill the
ends and bolt on a small gate band to produce another set of
springs if my drilling is successful
#Post#: 7715--------------------------------------------------
Re: 1932 Strupp Miller Special
By: RhysN Date: October 9, 2022, 11:54 am
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I have drilled some leaves just in the last few days. As per
suggestions from a spring maker I spot heated with a blow torch
to red, then left to cool, and drilled on the drill press. It
worked for me.
I have previously cut spring leaf with a 1mm disc in the angle
grinder. Not being greedy with feed speed it worked for me, if
got too warm for comfortable touch I stopped.
#Post#: 7896--------------------------------------------------
Re: 1932 Strupp Miller Special
By: Long83 Date: November 17, 2022, 6:29 am
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I'll definitely be using those suggestions next time, thanks
both.
A tool I found really useful for cutting a lot of things on the
build so far is a little cordless circular saw for cutting
steel. I honestly didn't think it'd work, but I cut the whole
length of the spring to narrow it slightly and you'd think it
was just going through plastic.
I've made a little more progress, got the front end almost done
with engine mounting and spring hanging sorted, just need to
sort the leading arms if that's what they're called.
#Post#: 7897--------------------------------------------------
Re: 1932 Strupp Miller Special
By: Long83 Date: November 17, 2022, 6:37 am
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I've been looking at steering and found a thrust reverser
gearbox from a tornado jet on eBay for £10, so bought one to see
if I could use it as a bevel gearbox for doing a steering arm
running down the side of the car as per the original. The
problem I've found is the input/output on one side is a 5/8ths
outer diameter 24 spline socket, the other is a nice and easy
10mm square hole.
Would any of you know of anything I could use that would fit
nicely in the splined hole? The closest thing I've found so far
would be a 40DP 5/8ths gear that I could weld to a steering
shaft, but not sure if the spline geometry would match (happy to
file/grind to fit). I was hoping for an input shaft for a
gearbox, or maybe a splined camshaft that could found in a
scrappers. Any ideas are very welcome
#Post#: 7898--------------------------------------------------
Re: 1932 Strupp Miller Special
By: sylvaman Date: November 17, 2022, 10:25 am
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Some great work on that front end ;D. Phillip. Well Done !!
#Post#: 7899--------------------------------------------------
Re: 1932 Strupp Miller Special
By: StefanN Date: November 17, 2022, 11:58 am
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What’s the outside diameter of the spline? I’ve not counted
on the photo but is it 40 “teeth”?
#Post#: 7901--------------------------------------------------
Re: 1932 Strupp Miller Special
By: Long83 Date: November 17, 2022, 1:30 pm
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The OD of the spline is 5/8 inch or 15.8ish mm, its 24 teeth on
the spline which seems to be common for clutches/crankshafts,
but not in a 5/8 inch diameter.
I've emailed the seller on eBay to ask if they sell the mating
part, but no luck yet.
#Post#: 7902--------------------------------------------------
Re: 1932 Strupp Miller Special
By: StefanN Date: November 17, 2022, 2:00 pm
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I think the mating part I might be a Tornado jet - careful what
you bid for! I’ll have a look in my box of “useful stuff” to
see if I have anything that might help
#Post#: 7903--------------------------------------------------
Re: 1932 Strupp Miller Special
By: Long83 Date: November 18, 2022, 6:56 am
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I suspect you might be right. Thank you for having a look, my
box of useful stuff is somewhat lacking at the moment.
If all else fails, I'll take it to a local engineering firm and
see if they could cut the splines on an offcut
#Post#: 7909--------------------------------------------------
Re: 1932 Strupp Miller Special
By: chrisenamels Date: November 19, 2022, 6:11 am
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I would think it's more likely to be metric there's only a gnats
between 5/8" and 16mm.
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