If you can't find it... Shockstop 'honking' rubbers
- Clydesdale Scot
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If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Sun Dec 02, 2012 9:25 pm
Shockstop produced these in the late 1940s for use on brake levers to cushion the riders hands when using brakes such as the GB Hiduminium, especially when working hard ('honking' for the British riders) up a hill.
The originals are extremely hard to acquire, and all attempts to find some reported reproductions were unsuccessful.
Mario aka 'Silverlight' said he had an original set.
He generously loaned them to me to measure and try to have them reproduced.
The rubber has hardened and has splits. It is unlikely to survive installation onto the brake levers.
After exploring various methods of making a master, we settled on a aluminium version. A mate machined it for me.
I identified the font, then in a series of steps in Illustrator, arrived at the desired single stroke, and ensured the kerning closely matched the original. This provided the path for the engraving.
But finding someone to machine the text around the master was difficult. It is not often done nowdays and the pantographing machines and skilled operators around immediately following WW2 are long gone. A local business was willing to try, and it took three passes on each side to achieve the required depth.
Another local business was confident to make the reproductions and after making the mold from the master, a number of compounds were trialed to achieve the combination of being able to be installed, being durable in use and providing the required level of cushioning.
A small production run, at one per day, was commissioned.
There are sufficient differences to allow no confusion as to what is an original and what is the reproduction, and that is desirable, starting with the use of a modern compound and not rubber.
A special set was made for my Spearman.
PM me if you are interested in a set for a late 1940's bike.
GB introduced the Superhood brakes in the early 1950's and these incorporated rubber cushioning to the brake hoods, negating a future market for these 'honking' rubbers.
It has been a satisfying journey, particularly this afternoon when I was finally able to provide a set to Mario, as a token of my thanks. Great forum this!
I hope this inspires others.
Philip
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby toolonglegs » Sun Dec 02, 2012 9:40 pm
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby ldrcycles » Sun Dec 02, 2012 10:10 pm
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby hiflange » Mon Dec 03, 2012 12:34 am
For a few short years I had in my care a Citroen DS Safari. Despite their reputation they are a durable car and most parts are readily available at a reasonable price. The supply of gear lever shrouds for RHD vehicles had long since dried up and a member of a local french car forum commissioned reproductions. The naysayers had a (fairly mild) field day until the repro rubber was delivered.
Repro parts for classic cars are big business now. From memory I think you can pretty much build an MGB from repro parts...
I've been into old cars and old motorbikes. Pushbikes are simpler and cheaper to work on. Looking at the prices of certain perishable items climbing on that popular auction site must certainly be an incentive for people with the right skills gird their loins... Mafac half hoods anyone??
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby rkelsen » Mon Dec 03, 2012 10:30 am
I'm not sure if the OP wants to produce these on any sort of scale, but I'm sure that there would be a world wide market for these hoods.RobertFrith wrote:Repro parts for classic cars are big business now.
It's a nice, easy business model. Set up an online shop, [or an account on everyone's favourite Auction site] and I bet you'd sell a tonne of these to customers from all around the world.
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby WestcoastPete » Mon Dec 03, 2012 10:54 am
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby silverlight » Mon Dec 03, 2012 2:40 pm
These look absolutely amazing, All done with great detail and material.
Ive added it on to my Hetchins and the appearance looks great.
Folks if you have GB brakes then dont miss out on this.
Sliverlight
Code: Select all
- Clydesdale Scot
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Mon Dec 03, 2012 3:16 pm
The local manufacturer can do as many or as few as I require. They are set up for it.rkelsen wrote: I'm not sure if the OP wants to produce these on any sort of scale, but I'm sure that there would be a world wide market for these hoods.
It's a nice, easy business model. Set up an online shop, [or an account on everyone's favourite Auction site] and I bet you'd sell a tonne of these to customers from all around the world.
I would be delighted to see these on the period bikes, and perhaps recoup some of my setup costs.
I was looking for feedback before possibly making these more widely available.
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Ferrovelo » Mon Dec 03, 2012 8:47 pm
Here here.WestcoastPete wrote:Great work mate. I love that people are out there doing this kind of stuff...
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby ghostpoet » Tue Dec 04, 2012 1:35 am
Well done, amazing passion to undertake such a task. Count me in for a set!
Does a 1949 5 Swan qualify?
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Tue Dec 04, 2012 8:12 am
The current project is to custom make copper rivets, to go on custom formed leather which will go on a Brooks saddle frame which will have the cantleplate custom reshaped. The rivets need to be longer than the Brooks ones as I use thicker leather than the thickest Brooks. And the rivet heads may be a little larger than the largest of the Brooks.ghostpoet wrote:Definite signs of insanity there....
PM sent re repros.
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Mulger bill » Tue Dec 04, 2012 11:09 pm
Oooh, this I gotta see.Clydesdale Scot wrote:The current project is to custom make copper rivets, to go on custom formed leather which will go on a Brooks saddle frame which will have the cantleplate custom reshaped. The rivets need to be longer than the Brooks ones as I use thicker leather than the thickest Brooks. And the rivet heads may be a little larger than the largest of the Brooks.ghostpoet wrote:Definite signs of insanity there....
London Boy 29/12/2011
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Wed Nov 06, 2013 7:13 am
just tidying up, the saddle work is at this threadMulger bill wrote: Oooh, this I gotta see.
"Oooh, this I gotta see. " Brooks: reshaped and new cover
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby spirito » Wed Nov 06, 2013 12:21 pm
Clydesdale Scot wrote:
I hope this inspires others.
you rock !!!
Proud of you and a job very well done
Cranky Jim wrote: God did not invent gears. Men invented gears ... because we are not gods.
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby flyingdutchman63 » Wed Nov 04, 2015 1:20 pm
I'm needing some for my early 50s Dawes Courier:
http://s1203.photobucket.com/user/flyin ... o%20photos" onclick="window.open(this.href);return false;
Thanks
Tim Potter
Okemos, Michigan, USA
PS: Sorry, couldn't figure out how to PM anyone through this forum.
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby WyvernRH » Wed Nov 04, 2015 3:42 pm
Richard
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Wed Nov 04, 2015 4:36 pm
yes, always available. I will PM you with details.flyingdutchman63 wrote:Clydesdale Scot, do you have any more of these "honking" rubbers available for sale?
I'm needing some for my early 50s Dawes Courier:
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby old steel Bikes » Sun Feb 12, 2017 6:40 pm
Danny
Reason: Fix photobork
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Mon Feb 20, 2017 6:46 pm
As noted above, Danny has already supplied a set of used originals.
bar end plug 2 by philip.knight, on Flickr
These have the overall height and body thickness but lack some of the detail of the original, particularly the ridges to hold it in place.
I happen to have the c1956 Shockstop brochure. These brochures are extremely rare (not even in the V-CC library).
bar end plug 1 by philip.knight, on Flickr
Using the dimensions of Danny's original, together with the profile found in the brochure image, I should get something I can work with.
I will draw it up in a 3D program (another new skill to be acquired) and then get it checked by friends who know about these things, then get a master 3D printed.
That master can be used to make a mould for casting copies using urethane.
I will seek advice as to the merit of trying to do the text, as it isn't seen when they are in use.
Unless anyone can suggest a better workflow (which is the point of posting this!)
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby find_bruce » Tue Feb 21, 2017 7:14 am
Just a thought, is it possible to 3D print the mould ?Clydesdale Scot wrote:Using the dimensions of Danny's original, together with the profile found in the brochure image, I should get something I can work with.
I will draw it up in a 3D program (another new skill to be acquired) and then get it checked by friends who know about these things, then get a master 3D printed.
That master can be used to make a mould for casting copies using urethane.
I will seek advice as to the merit of trying to do the text, as it isn't seen when they are in use.
Unless anyone can suggest a better workflow (which is the point of posting this!)
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Tue Feb 21, 2017 8:20 am
I think the cleaning up of the printing ridges would be troublesome. Easier to put the printed master into a lathe and use fine sandpaper.Just a thought, is it possible to 3D print the mould ?
But that is based on watching Quang's work on the stem cap
viewtopic.php?f=23&t=89389
but happy to be guided by anyone with experience.
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby QuangVuong » Sun Feb 26, 2017 5:42 pm
I'm happy to help with any 3D modelling questions. The main thing you need to get your head around is that you start with a 2D profile and then you can extrude it to the final 3D shape. In this case, it is a cylindrical shape, so you just draw the outer figure of half the part, similar to this. I drew it in the XY plane.
Then this profile is extruded/revolved around an axis or line, in this case being the x axis as marked by the orange line. The clear yellow is a preview in Solidworks on what the extrusion will look like.
And you end up with the final part. This took me about a minute to do drawn up to look about right, not to any dimensions or anything. As I know you're pretty good with Illustrator, you can start off in Illustrator and save the outline as a DWG or other compatible format to open in the 3D modelling software and all you will have to do is extrude or revolve the outline to end up with the 3D model.
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Sun Mar 05, 2017 9:57 pm
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Tue Mar 07, 2017 5:19 pm
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Re: If you can't find it... Shockstop 'honking' rubbers
Postby Clydesdale Scot » Wed Mar 08, 2017 4:44 pm
Last night I searched for more Shockstop handlebar plug images, and clicked through and found some NOS sets on evil bay.
They certainly looked NOS.
But no postage to Australia. The seller was in Connecticut, United States.
But the seller DOES post to Albania, Andorra, Austria, Belarus, Belgium, Bermuda, Bosnia and Herzegovina, Bulgaria [that is enough typing, it is a long list].
But not to Australia. I emailed the seller and asked "Do you post to Australia?"
His reply "Im sorry i do not post to austrailia."
I didn't want a set posted to austrailia. I wanted then to be sent to my address in Australia.
I might have overlooked his failure to use a possessive apostrophe, the lack of capitalisation of the personal pronoun, and the lack of capitalisation and (presumed) wayward spelling of Australia IF the seller was prepared to post.
I had some correspondence today with an American collector (who can spell, and is very friendly to deal with) and he understood my plight and has purchased a set and will forward them to me in Australia (I hope the evil bay seller does not work in the US postal service). Thanks Rudi.
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