Author Topic: New Car in Aus  (Read 27457 times)

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Online fabr

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Re: New Car in Aus
« Reply #45 on: April 03, 2015, 08:49:42 PM »
Ooooooooooo,I'm not too sure on the ball bearing use. I wish you well . Ball bearings do not like taking loads from the side as I'm betting you know,you seem to be a techy type as well as a thinker.. Did you see if there was a same size tapered bearing just in case? Perhaps an angular contact ball bearing of same size?Maybe designed with a contingency plan? Not trying to be unduly negative ,just have reservations on the ball bearing taking side impact loads well for long. I hope I'm very wrong because ,as you said,the big bore tapered ones are lots of $$$$$$$$$ here and you are in Oz!!!!! Have to sell a kidney or something . Being the bearings are huge,hopefully yheir side load capacity is high enough. PLEASE report on results after you hit the test track. I'm seriously interested in your experience with them.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Simon

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Re: New Car in Aus
« Reply #46 on: April 03, 2015, 10:27:25 PM »
Yep, I thought long and hard about it. I put an inner ring spacer between each bearing to try and get them to load share. To be safe, bearing manufacturers generally recommend you do not exceed 25% of the static load rating in axial force. The bearing I have selected has a 45kN (approx 10,100 lbf), so with two bearings load sharing (a big assumption), I should have around 22KN (5000 lbf) of axial load capacity.

Will it be enough? Time will tell I guess. What I learnt with the Barracuda bearing design was they never seemed to fail due to load - they were always full of crap due to ineffective sealing by relying on sealed bearings (they don't seal much at all). With my mid-board, I made sure I had good double lip seals in the design. Adds a shit tin of drag though.

If it all goes to custard, there are a couple of Timken tapered rollers I have my eye's on, but I doubt they will be cost effective. They are also not a direct replacement - I will have to manufacture new components.

Timken L522148WV/L522110V would be ideal.
Timken L623149/L623110 could be a close second.



Online fabr

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Re: New Car in Aus
« Reply #47 on: April 04, 2015, 06:32:10 AM »
Yep, I thought long and hard about it. I put an inner ring spacer between each bearing to try and get them to load share. To be safe, bearing manufacturers generally recommend you do not exceed 25% of the static load rating in axial force. The bearing I have selected has a 45kN (approx 10,100 lbf), so with two bearings load sharing (a big assumption), I should have around 22KN (5000 lbf) of axial load capacity.

Will it be enough? Time will tell I guess. What I learnt with the Barracuda bearing design was they never seemed to fail due to load - they were always full of crap due to ineffective sealing by relying on sealed bearings (they don't seal much at all). With my mid-board, I made sure I had good double lip seals in the design. Adds a shit tin of drag though.

If it all goes to custard, there are a couple of Timken tapered rollers I have my eye's on, but I doubt they will be cost effective. They are also not a direct replacement - I will have to manufacture new components.

Timken L522148WV/L522110V would be ideal.
Timken L623149/L623110 could be a close second.
I'd agree. Ya,this is what I thought. Will be very interested in how the gamble works out long term. How much use/hours will your buggy see? Just curious as I would have been afraid not to use tapered with the amount of work involved in designing/building the mids.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Simon

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Re: New Car in Aus
« Reply #48 on: April 04, 2015, 05:47:52 PM »
I will be doing about 6 x 200km races a year.

I have been getting the ball bearings cheap, so if they last a year, I'll be happy.

It took me 4 days to machine the midboards.  Don't really want to do it again if I can help it!
« Last Edit: April 04, 2015, 05:49:47 PM by Simon »

Offline Simon

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Re: New Car in Aus
« Reply #49 on: April 05, 2015, 02:22:03 AM »
Broomstick makes a good dummy shaft to check the angles and lengths before parting with your hard earned for a real axle.  ;D

Online fabr

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Re: New Car in Aus
« Reply #50 on: April 05, 2015, 07:48:11 AM »
Looking good!!!!
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Carlriddle

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Re: New Car in Aus
« Reply #51 on: April 06, 2015, 05:03:34 AM »
Those are some nice long broom sticks.

On the bearing issue.  Seems like most rev box guys have issue with input shaft bearings.  I'd think I'd use the same bearing as used in the m/c countershaft.  Don't hear of many failures there.  And proper lube.
You can keep your CHANGE, I'd like to keep my DOLLAR.

Online fabr

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Re: New Car in Aus
« Reply #52 on: April 06, 2015, 06:12:48 AM »
The bearings we were discussing are the huge ones that are in the mid board hubs,not the reverse unit.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Carlriddle

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Re: New Car in Aus
« Reply #53 on: April 06, 2015, 08:18:02 AM »
The bearings we were discussing are the huge ones that are in the mid board hubs,not the reverse unit.
drowning  wrong forum drowning  Dont mind me.  Now the side load part makes sense.
You can keep your CHANGE, I'd like to keep my DOLLAR.

Offline Simon

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Re: New Car in Aus
« Reply #54 on: April 06, 2015, 06:21:43 PM »
Motorbike output bearing I have seen was a double row ball bearing. They are pretty wide. This was in a CBR1100

Never actually seen one, but I've been told the RPM input shaft is only 1" in diameter. That's seriously tiny and I can understand why they use a tapered roller there.

I chose a 40 x 80 x 18 ball bearing for my input on my FNR. I chose that size because if I find it fails due to load, there is a cylindrical roller with exactly the same dimensions with almost double the capacity that is a direct replacement.

Trying the cheap way first though  ;D.

Anyway, trial fit the front end yesterday. Looking like a car now.

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Re: New Car in Aus
« Reply #55 on: April 06, 2015, 07:56:08 PM »
Getting excited yet??
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Simon

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Re: New Car in Aus
« Reply #56 on: April 19, 2015, 03:21:42 AM »
Sort off. Every time I do, I realize how much work there is to do.

Anyway, she is rolling.

Online fabr

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Re: New Car in Aus
« Reply #57 on: April 19, 2015, 06:36:35 AM »
Sort off. Every time I do, I realize how much work there is to do.

Anyway, she is rolling.
Just keep thinking about how much you have accomplished so far.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Carlriddle

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Re: New Car in Aus
« Reply #58 on: April 19, 2015, 07:58:21 AM »
You never get done til it's sold and gone.
But I find when I get to about this point I make a list. This helps me stay focused on finishing ea little project. Also helps me make a parts list for all the tiny bits that are the real cost of building.

Triple bypass air shocks!!  That's the ultimate tunable shock!! 
You can keep your CHANGE, I'd like to keep my DOLLAR.

Offline dsrace

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Re: New Car in Aus
« Reply #59 on: April 19, 2015, 08:46:03 AM »
looking real good!! what kind of dog is that in the kennel? what are you hoping for weight?  is that a fuel tank in front of the motor below the radiator?
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