New Steering Coupler

For vendors to announce new 356 products, changes to existing products, recalls, request product feedback, other changes to their business.
Post Reply
Message
Author
User avatar
Ron LaDow
356 Fan
Posts: 6171
Joined: Wed Mar 26, 2008 11:45 am
Location: San Francisco

New Steering Coupler

#1 Post by Ron LaDow » Mon Jul 30, 2018 11:55 pm

embarrassing tantrum deleted.
Last edited by Ron LaDow on Tue Jul 31, 2018 10:28 pm, edited 1 time in total.
Ron LaDow
www.precisionmatters.biz

Martin Benade
356 Fan
Posts: 3537
Joined: Wed Nov 23, 2011 10:52 am
Location: Cleveland, Ohio

Re: New Steering Coupler

#2 Post by Martin Benade » Tue Jul 31, 2018 12:16 am

Ron, can't a simple image resize make this work? I'd have to spend ten minutes to do it cuz I am old like you, but I think it is really a 30 second chore. I am not trying to be obnoxious. Find a kid to help. I am interested to see what your product looks like, too.

User avatar
Ron LaDow
356 Fan
Posts: 6171
Joined: Wed Mar 26, 2008 11:45 am
Location: San Francisco

Re: New Steering Coupler

#3 Post by Ron LaDow » Tue Jul 31, 2018 12:21 am

Embarrassing tantrum deleted.
Last edited by Ron LaDow on Tue Jul 31, 2018 10:28 pm, edited 1 time in total.
Ron LaDow
www.precisionmatters.biz

Martin Benade
356 Fan
Posts: 3537
Joined: Wed Nov 23, 2011 10:52 am
Location: Cleveland, Ohio

Re: New Steering Coupler

#4 Post by Martin Benade » Tue Jul 31, 2018 12:29 am

I regularly send very small file images to insurance companies with estimates, they show more than enough detail and look plenty clear. A normal cel phone picture is far higher quality than needed for this use.

User avatar
Ron LaDow
356 Fan
Posts: 6171
Joined: Wed Mar 26, 2008 11:45 am
Location: San Francisco

Re: New Steering Coupler

#5 Post by Ron LaDow » Tue Jul 31, 2018 12:37 am

Martin Benade wrote:I regularly send very small file images to insurance companies with estimates, they show more than enough detail and look plenty clear. A normal cel phone picture is far higher quality than needed for this use.
Suffice to say, what I wish to convey needs the resolution I prefer. Why it is not possible to post them here remains a mystery.
YMMV.
Ron LaDow
www.precisionmatters.biz

User avatar
C J Murray
356 Fan
Posts: 7231
Joined: Fri Oct 23, 2009 7:24 pm
Location: 30MI WEST OF PHILA

Re: New Steering Coupler

#6 Post by C J Murray » Tue Jul 31, 2018 6:18 am

7-30 002.jpg
Until Ron gets out of bed in SF here is what he has made. Flexibility is provided by rubber o-rings and safety is provided by washers which will not allow the assembly to pull apart if the o-rings would fail.
'57 Speedster
'59 Sunroof
'60 Devin D Porsche Race Car - Finally Finished!
'63 GS 2133 coupe
'64 Elva Courier mk4T
'67 911 S Original Owner

User avatar
Emil Wojcik
356 Fan
Posts: 1296
Joined: Tue Mar 25, 2008 7:20 pm
Location: Metuchen, NJ

Re: New Steering Coupler

#7 Post by Emil Wojcik » Tue Jul 31, 2018 10:34 am

I can post high res images taken with my iPhone with no problem and it looks like CJ can too. Perhaps you're having a different problem, although I can't imagine what. Nice looking product BTW.

Ron LaDow wrote:...Oh, and see that black square off to the left? That's what the Registry Site filter allowed of the shot of my Speedster. Informative, isn't it?
And I'm used to your solid black square. It's instantly recognizable as 'you' and very hard to miss as you scroll down the page. I always gave you credit for coming up with it as a great marketing tool...can't miss it!
Emil Wojcik
'64C Euro coupe

User avatar
Ron LaDow
356 Fan
Posts: 6171
Joined: Wed Mar 26, 2008 11:45 am
Location: San Francisco

Re: New Steering Coupler

#8 Post by Ron LaDow » Tue Jul 31, 2018 10:47 am

First, I apologize for the temper tantrum, and specifically to Curt.
CJ, thanks for posting that, and I'll be a good boy today and re-size all the images to show what and why.
Emil, I'm using a Fuji 'point and shoot', and when I try uploading, I get 'exceeds (some limit) cannot accept', and I remain amazed that the site will not accept what comes off of one of those cameras.
Again, my apologies.
Ron LaDow
www.precisionmatters.biz

User avatar
Emil Wojcik
356 Fan
Posts: 1296
Joined: Tue Mar 25, 2008 7:20 pm
Location: Metuchen, NJ

Re: New Steering Coupler

#9 Post by Emil Wojcik » Tue Jul 31, 2018 11:15 am

Yeah, a camera's resolution is too high for three other sites I frequent, it's not just the Registry. Phone cameras are lower res but still way more than what's needed for most purposes.

On my point-and-shoot camera I can lower the resolution before shooting. Don't know if yours can be adjust but might be worth a try.
Emil Wojcik
'64C Euro coupe

User avatar
Ron LaDow
356 Fan
Posts: 6171
Joined: Wed Mar 26, 2008 11:45 am
Location: San Francisco

Re: New Steering Coupler

#10 Post by Ron LaDow » Tue Jul 31, 2018 12:47 pm

Emil,
Maybe there is such a feature on my camera, but I'm a better wrench than a photoger, so I 'adjust' the images in Paint on the computer.
Anyhow, this is the subject:
We want a bit of elasticity in the steering gear and here's where we started:
Proto to skank.JPG
The scheme here puts metal connecting pieces in an elastic part. We got the elasticity, but we also have a part which can fail catastrophically if it isn't inspected regularly, and a lot of 356s no longer get that sort of attention.
So let's reverse the scheme and capture elastic inserts in recesses in sandwiched metal parts as shown in the one-hole test piece:
Blank 001.JPG
Actually, more than a couple of one-hole test pieces to get the dims correct, and then make a four-holer (if you will):
Still square 004.JPG

And then a little work on the lathe gets you:
Functional Prototype - early006.JPG
By altering the lengths of the bushings, the same part will fit both early and late applications. This is the "early" fitting; the "flanges" are bolted to the short bushings.
Added by edit; got a question to my email:
Both length bushings are fitted to the part. They simply alternate on either side; short-90*-long-90*-short-90*-long. Which means the assembled part can be rotated to fit the "early" or "late" application.
Notice the long bushings are sized such that they cannot pull through, meaning that a complete failure of the elastic inserts will not allow the steering wheel to pull back and disengage from the linkage. Maximum axial movement on such a failure is ~.03"
Here's the "Late" fitting:
7-30 002.JPG
This has the "flanges" attached to the long bushings, thus making the part thick enough to serve in the later steering design. The washers on the short bushings serve to prevent pull-though, and per above, limit the axial movement during failure.
Baring some sort of atomic failure of the aluminum, this part is absolutely fail safe and will be the last steering coupler your car will ever need.
One final image (8/10/18):
Ground Fastening Cropped.JPG
Our chief Product Designer (cough, cough) is congenitally opposed to capturing electrical terminals in structural fastenings, so you'll notice the secondary nut, meaning that any crush of the ring-tongue terminal in no way affects the structural integrity of the assembly.

Parts are under contract, the aim is to have stock by late September and the price looks to be well under $150.
I hope you'll consider our product for your car.
Last edited by Ron LaDow on Fri Aug 10, 2018 8:48 pm, edited 2 times in total.
Ron LaDow
www.precisionmatters.biz

MICHAEL FOSTER
356 Fan
Posts: 208
Joined: Tue Mar 25, 2008 6:14 pm

Re: New Steering Coupler

#11 Post by MICHAEL FOSTER » Wed Aug 01, 2018 12:43 pm

Hi Ron do you think this part is safe in an accident? The original part has quite a bit of "give" built into it which allows it to deflect and possibly break during an accident which may be a beneficial side affect of having factory rubber style piece. Wondering if making it more rigid and unbreakable could cause injury to driver in side collision (ripping wheel from drivers hands) or head on collision pushing steering column shaft into driver or possibly causing more damage to steering and suspension components too?
Also would this system transmit more vibration to steering wheel?

Michael Foster
p.s. love your products and appreciate the work you do for us 356 people.
MICHAEL FOSTER

User avatar
Ron LaDow
356 Fan
Posts: 6171
Joined: Wed Mar 26, 2008 11:45 am
Location: San Francisco

Re: New Steering Coupler

#12 Post by Ron LaDow » Wed Aug 01, 2018 7:09 pm

Michael,
There is no more 'give' in the stock parts than the Pre Mat part until they are long past requiring replacement. Hoping for a benign failure is hoping you have a very specific crash just before the parts were going to fall apart anyhow.
And neither the stock piece nor any of the replacements offer any help at all in a head-on collision, and shy of re-engineering the steering shaft entirely, there is no way to do so. There are some few advantages to having a car that gets backwards easily, and this is one of them.
You are far more likely to have a dangerous failure by many decimal points.
As to transmitting vibration, it is doubtful. All four bushings ride within 70-duro elastomer rings. I guess you might find some weird harmonic if a wheel were out of balance exactly this much at that exact speed, but like the benign failure, chances are probably better at the Lotto.
Thanks for the comment
Ron LaDow
www.precisionmatters.biz

User avatar
Emil Wojcik
356 Fan
Posts: 1296
Joined: Tue Mar 25, 2008 7:20 pm
Location: Metuchen, NJ

Re: New Steering Coupler

#13 Post by Emil Wojcik » Wed Aug 01, 2018 7:35 pm

I would have just said even with a perfect original coupler you'd be dead before the coupler would fail from an accident. Your explanation sounds a lot more credible than mine, so, thanks.
Emil Wojcik
'64C Euro coupe

Post Reply