[project] The Ultimate Track 205

[Cameron 16]

Well for now it won't be collapsible, certainly no point in doing it until the regs stipulate it.. that's how competition cars get built too heavy.

[Mad Scientist 106]

A slightly offset lower column would do the trick.

 

Compromising safety for the sake of a few grams is not wise. Just have a poo before you compete? My navi calls them fast poos!

[Cameron 16]

My reasons for not thinking it warrants a collapsible column will become apparent when you see the finished item; bear in mind the upper UJ is very close to the bearing housing.

[the matt 13 2 Cars]

Sorry I started this whole column convo off Cam. I am not good at internets.

[mike174 9]

Ask him about circlips on his wishbones next Matt...

[Rippthrough 98]

. that's how competition cars get built too heavy.

 

Yep, but I prefer an extra 200 grams to a few kilos of wooden casket...

[Cameron 16]

All things considered I don't want the extra weight (substantially more than 200g) of a collapsible column, or want to go through the hassle of designing & testing (because let's face it, if you're not going to test it you may as well not bother) a reliable system. So let's just move on, shall we?

 

Don't even think about mentioning circlips, Mike, or I'll dig up your video on YouTube.

[mike174 9]

I was testing the durability of the car lol the video doesn't take much digging... Sent the bump stops yet?

[Rams_gti6 12 1 Cars]

Can't wait to see the finished article! When you hoping to be finished?

[Cameron 16]

Weeeeeeeeeeeeeell.. I still have to finish the rolling chassis, then sort out the engine & ancillaries, fuel system, electrics, and bodywork. Hopefully by the end of next year, but we'll see how that goes.

[Cameron 16]

Well.. excellent service by Igus, shame the bearings are the wrong size!

 

I ordered 19.05mm (3/4") bearings, but the hole is 19.7mm so it's like a cock in a bucket. I reckon I'll just save a bit of hassle and go for 2 sphericals as I know that will work. It's a shame not to try something new, but I'd rather just know it'll be reliable.

[johnnyboy666 195 1 Cars]

same thing happened to me recently when I got somebody to turn something up on a lathe for me, I gave them precise measurements, then when I received them, they didnt fit. "oh I did them oversized to make them fit easier for you." he says. well congratulations, they're useless now!

[the matt 13 2 Cars]

I used to buy them off the bearing boys site and never had that kind of issue.

 

Sphericals ftw though man.

[mike174 9]

If you go sphericals will you use circlips this time though? Lmao

[Cameron 16]

Hurr. No I'll just use a fit that doesn't require them.

[mike174 9]

Do you just not have a pair of circlip pliers or something?

[Cameron 16]

No and I'm not buying any, either.

[mike174 9]

Haha knew there must be a reason for your hate of circlips

[EdCherry 34 1 Cars]

You'll be glad to know the dampers don't come with circlips either Cameron...

 

 

 

 

They come with spiral rings so no tools required if you have long fingernails!

[Cameron 16]

Nice. Stupid circlips.. think they're so clever.

 

I'll be calling up soon, Ed.. just need to get all my parts in order as I've got quite a few orders outstanding!

[Rippthrough 98]

Snap rings ftw.

[Cameron 16]

Designing components so the bearings don't fall out FTW.

[Weser 30]

Thats a shame. We order loads at work and never get a problem. I do use metric though.

 

remember they are not like a sphereical they are designed to compress a bit when pressing into the housing (closing up the hole). With your skills could you knock up a housing quick and test?

Edited September 5, 2013 by Weser

[Rippthrough 98]

Designing components so the bearings don't fall out FTW.

 

Letting the snapring deal with shock loads and using a smaller, light component FTW

[Cameron 16]

What shock loads is a wishbone going to have to pull the spherical out the bottom of the housing? Think about how a wishbone with pushrod mount will be loaded. The only time there will be a load is from the inertia of the unsprung mass in an extreme top-out, but the fits I'm using are as recommended by the bearing manufacturer for moderate axial loading so that will not be a problem.

 

I can see the relevance of a circlip in a wheel bearing housing - like on a 205 - where the loads are in both directions, but it just isn't necessary for this particular use.

 

So unless someone comes up with a very good reason why I should use them, and not just because they've seen them in some other application completely irrelevant to this one, let's just all put this issue to bed.