luke2152
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| posted on 6/2/15 at 06:15 PM |
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clamp supplier
I've got a mk2 escort rack and need some kind of non standard clamp to attach it (or make a mounting adaptor to use standard clamps). I tried
to use handlebar clamps that I got off a bike and they are pretty much perfect but slightly too small clamping diameter. And I bodged them a bit
trying to open them up with a hand drill. I used them anyway but now I want to move the rack so I figure I'd rather do it properly. I
don't even know what that style of clamp is called but I figure there must be an off the shelf industrial sort of clamp in the right diameter
(about 28.5mm). Or I guess I could buy another set of bike bar clamps and get someone to drill them properly....anyway heres a pic so you know what
I'm talking about
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rusty nuts
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| posted on 6/2/15 at 06:39 PM |
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What's stopping the rack from moving side to side? The way the rack is secured doesn't stop the rack from shifting whatever clamp is used.
IMHO a redesign of the rack mounting would be a good idea ,, then you could use standard Escort rack clamps
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britishtrident
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| posted on 6/2/15 at 07:30 PM |
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Yes on the standard Escort setup the mounting at the pininion side takes the side thrust loads and transfers them to the chassis.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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luke2152
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| posted on 6/2/15 at 07:40 PM |
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I'm pretty sure handlebar mounting is pretty safety critical on a bike so if its good enough for that its good enough to stop any sideways
movement on the rack.
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Brian R
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| posted on 6/2/15 at 08:23 PM |
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Don't handlebars though have a knurled section in them adjacent to where the clamps fit? The clamps then bite into this to stop any movement.
I would worry they would move mounting them like you have both side to side and rotational.
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daviep
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| posted on 6/2/15 at 08:28 PM |
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If the clamps are a good fit I wouldn't be at all concerned.
28.5mm is almost exactly 1.125" which is a common handle bar size in the US, maybe try ebay.com or amazon.com
Cheers
Davie
“A truly great library contains something in it to offend everyone.”
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watsonpj
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| posted on 6/2/15 at 08:36 PM |
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The forces experienced by the handlebar clamps (rotational) is completely different from the axial loads directed down the centre of the rack. Ford
put two clamps on the rack and built shoulders on one of them to stop movement so they obviously thought it was important.
Why cant you use the standard mount type?
Pete
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daviep
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| posted on 6/2/15 at 09:14 PM |
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quote:
Originally posted by watsonpj
The forces experienced by the handlebar clamps (rotational) is completely different from the axial loads directed down the centre of the rack. Ford
put two clamps on the rack and built shoulders on one of them to stop movement so they obviously thought it was important.
Why cant you use the standard mount type?
Pete
Ford also used some squishy rubber and a couple of pieces of pressed tin for clamps so the clamping force in the original setup is minimal hence the
requirement for the locating shoulders.
A clamp of the type shown which fits the tube correctly will not slip.
Cheers
Davie
“A truly great library contains something in it to offend everyone.”
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gavin174
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| posted on 6/2/15 at 09:33 PM |
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quote:
Originally posted by luke2152
I'm pretty sure handlebar mounting is pretty safety critical on a bike so if its good enough for that its good enough to stop any sideways
movement on the rack.
safety critical on a bike is a stupid thing to say....
or are you only going to drive at 30mph...
http://www.essexkitcarclub.com
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luke2152
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| posted on 6/2/15 at 09:38 PM |
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quote:
Originally posted by gavin174
quote:
Originally posted by luke2152
I'm pretty sure handlebar mounting is pretty safety critical on a bike so if its good enough for that its good enough to stop any sideways
movement on the rack.
safety critical on a bike is a stupid thing to say....
or are you only going to drive at 30mph...
A motorbike 
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Andybarbet
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| posted on 6/2/15 at 09:44 PM |
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What to gas recommend for the mounts ?
My brother in law is building a zero, if I can get hold of him I will ask him what he has done on his, it's a rolling chassis at the moment.
Give a man a fish & it will feed him for a day, give him a fishing rod & you've saved a fish.
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britishtrident
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| posted on 6/2/15 at 09:49 PM |
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On Escort rack the pininion housing on the rack that is designed to resist side loads not the steel tube of the rack body.
The steel tube of the rack is only held to the pinion housing by an interference fit.
The compressive and tensile loads transmitted to rack from the track rods are not trivial, if the rack is located only by mountings on the tubular
steel body the rack there is very little to prevent the pinion housing parting company from the rack if the passenger side track tranmits an excessive
compressive load i.e. hitting a kerb or pot hole.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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luke2152
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| posted on 6/2/15 at 09:51 PM |
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quote:
Originally posted by Andybarbet
What to gas recommend for the mounts ?
My brother in law is building a zero, if I can get hold of him I will ask him what he has done on his, it's a rolling chassis at the moment.
Mine has the track steering rack mounts and on the mx5 instead of sierra build its is unusual.
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gavin174
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| posted on 6/2/15 at 10:11 PM |
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quote:
Originally posted by luke2152
quote:
Originally posted by gavin174
quote:
Originally posted by luke2152
I'm pretty sure handlebar mounting is pretty safety critical on a bike so if its good enough for that its good enough to stop any sideways
movement on the rack.
safety critical on a bike is a stupid thing to say....
or are you only going to drive at 30mph...
A motorbike
silly me your right..
a motorbike has the same weight/forces over the front wheel as a car.
good luck with your build.
http://www.essexkitcarclub.com
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daviep
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| posted on 7/2/15 at 04:39 AM |
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quote:
Originally posted by britishtrident
On Escort rack the pininion housing on the rack that is designed to resist side loads not the steel tube of the rack body.
The steel tube of the rack is only held to the pinion housing by an interference fit.
The compressive and tensile loads transmitted to rack from the track rods are not trivial, if the rack is located only by mountings on the tubular
steel body the rack there is very little to prevent the pinion housing parting company from the rack if the passenger side track tranmits an excessive
compressive load i.e. hitting a kerb or pot hole.
This is a fair point which I hadn't considered.
Cheers
Davie
“A truly great library contains something in it to offend everyone.”
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rusty nuts
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| posted on 7/2/15 at 08:00 AM |
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Every production car I have ever seen, and in 48 years in the motor trade I've seen a few, has had some form of positive location for the rack .
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