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Author Topic: Front Axles  (Read 44 times)

RhysN

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Front Axles
« on: 21 July 2019, 09:57:55 am »
I know there have been a number of ways to make these, but it's always nice to see how others do them, so here's a special place to post what you are doing/ have done.

To start I'll post what I'm doing for the quick build/rebuild thing I am in the process of.
This is using somewhat specific stub axles, simply because I have them. Tube came from Graham Hill who had one bent by Gemini, I have made the rest and then had it welded by my friendly man.
Second photo is the bits I make which go on to control the caster. This one will start at 5 degrees. I can always adjust that if I feel the need with wedges between these things and the spring.
« Last Edit: 21 July 2019, 11:27:10 am by RhysN »

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RhysN

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Re: Front Axles
« Reply #1 on: 21 July 2019, 11:34:24 am »
Now for the one made for Kim, which is a GN inspired car. This was actually done fairly closely to the real thing. It has quarter elliptic front springs which run forward from the chassis to be mounted between lugs on the axle.
To stop it twisting the GN had either a link under the axle to another set of lugs, or a friction damper. The mounting of the damper on the chassis can be adjusted forward and back to adjust castor, or if a link, they had a threaded adjuster. Like all things GN there are no hard and fast rules, the spring could be above, or below the axle. Most times the lugs were a cast unit that clamped to the straight axle tube, bit I used weld instead.
The axle ends were made from pieces of angle iron suitably cut and welded to give the spacing for the generic go kart stub axles. The ones on Kim had taper roller bearings in the stub axle units. (17 mm shafts)

RhysN

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Re: Front Axles
« Reply #2 on: 21 July 2019, 11:40:34 am »
this one is one I made, and never finished, for a real Cyclecar somewhat like Tim Gunn's Grafton.
This uses cycle parts, the bottom brackets (here the pedal shaft runs on a bike) are welded to the straight tube, then all the bits that normally are on a bike except the pedals themselves are installed complete with bearings. One of the pedal "cranks" is  used  each side to form the steering arms.
When Tim built Grafton another crank is bent to carry the stub axle. I don't have enough heat to do that yet.