Tapered Roller Bearing Hubs--IT'S HAPPENING - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 03-13-2016, 03:08 AM   #1
Elite Member
Thread Starter
iTrader: (1)
 
cordycord's Avatar
 
Join Date: Dec 2011
Location: SoCal
Posts: 1,775
Total Cats: 148
Default Tapered Roller Bearing Hubs--IT'S HAPPENING

I wanted to let you guys know that testing is moving forward on the new hub designs. There will be a new front and rear hub design that incorporates tapered roller bearings to better disperse the load and lessen the chance of failure. Lessen...this is racing, after all.

Front hubs--very basically the idea is not to reinvent the total hub, but keep it as stock as possible while improving the design. The OEM design bearings are low friction but also high stress. The fact that the races are built into the hub itself means that the same material used in the hub is also used on the races. Not good. Using tapered bearings means we can use much harder material on the races, and forged hub casting material on the hub.

The new hubs have new tapered roller bearing innards that are bigger and disperse the heat and load better. I won't go into the details of the hub, other than to say that they'll also include 70mm studs and the entire unit will be forged steel, not aluminum.

Provisions will be made for ABS rings. I'd like to hear whether pre-installed ABS rings are a must, or if the racers in this crowd that demand ABS are also OK popping on their own ABS rings.

The first part of the testing is almost done, and the FEA (Finite Element Analysis) is proving out what we thought. We tested for Cornering, Braking and Bump stresses on the hub. Not surprisingly, cornering came out as the highest stress value. The stresses on the stock hub in the bearing are representative of the stress concentrations at each ball bearing, but it's best not to consider this a test of real stress on the hub as much as a comparison of stress to the new hub design. We could really go into the weeds with testing, but this gives us a good baseline. This is also the reason why actual track testing will follow the FEA.

I'll be showing a lot more, but for now here's the load stress from braking on the front hubs:




Rear Hubs--these are also an issue, but not nearly the same as the fronts. These will also see a swap to tapered roller bearings. They'll also see a flange redesign that's wider and that has a smoother transition to the hub base. These should give many years of safe use and protect against the monster horsepower that some people are getting out of their swapped and turbo'd Miatas.

More pictures to come, but I wanted to show you our up to the minute progress.
Attached Thumbnails
Tapered Roller Bearing Hubs--IT'S HAPPENING-80-braking_von_mises_clipped_15mpa_edfbb716e0fe29541e7163f83ecb8bb18400fb20.png  

Last edited by cordycord; 03-13-2016 at 03:11 AM. Reason: grammar
cordycord is offline   Reply With Quote
Old 03-13-2016, 05:14 AM   #2
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,883
Total Cats: 521
Default

Um, yes? Good, very good...
turbofan is offline   Reply With Quote
Old 03-13-2016, 02:50 PM   #3
Junior Member
 
Join Date: Jan 2009
Posts: 171
Total Cats: 28
Default

Thanks Cord!
unk577 is offline   Reply With Quote
Old 03-13-2016, 05:28 PM   #4
Senior Member
iTrader: (3)
 
Join Date: Dec 2008
Location: KY
Posts: 683
Total Cats: 44
Default

Interested.
jpreston is offline   Reply With Quote
Old 03-13-2016, 06:09 PM   #5
Senior Member
 
Join Date: Oct 2013
Location: NorthWest NJ
Posts: 1,049
Total Cats: 43
Default

Sweet. Though I literally just bought new hubs. Oh well, they were cheap, I will upgrade down the line.
x_25 is offline   Reply With Quote
Old 03-13-2016, 07:13 PM   #6
Elite Member
Thread Starter
iTrader: (1)
 
cordycord's Avatar
 
Join Date: Dec 2011
Location: SoCal
Posts: 1,775
Total Cats: 148
Default

I was emailing back and forth with my FEA engineer last night 11pm to about 12:30. Boy what boring lives we must lead.

For those of you with a very high geek factor, the software used for the FEA is the Altair HyperWorks suite, specifically HyperMesh pre-processing, Optistruct solving and HyperView post processing. NASA, Ford, Boeing et al are customers.

Once we have samples to test, we will be using Keith Tanner (version 1.0) to test the front hubs as well as a couple of other track junkies to get some feedback.
cordycord is offline   Reply With Quote
Old 03-13-2016, 08:54 PM   #7
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,929
Total Cats: 1,440
Default

Popping off rings is no issue, but it does mean that if you are trying to do an ABS swap you need to buy 2 sets of hubs, one set of yours, and one of ABS hubs.

Now if you also offered an ABS ring....
aidandj is offline   Reply With Quote
Old 03-13-2016, 08:58 PM   #8
Elite Member
Thread Starter
iTrader: (1)
 
cordycord's Avatar
 
Join Date: Dec 2011
Location: SoCal
Posts: 1,775
Total Cats: 148
Default

Quote:
Originally Posted by aidandj View Post
Popping off rings is no issue, but it does mean that if you are trying to do an ABS swap you need to buy 2 sets of hubs, one set of yours, and one of ABS hubs.

Now if you also offered an ABS ring....
We can $upply rings. My thought was that if you're replacing your ABS hub, wouldn't you simply take off the existing ring and put it on the new hub?
cordycord is offline   Reply With Quote
Old 03-13-2016, 08:59 PM   #9
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,929
Total Cats: 1,440
Default

Exactly, for most cases. Just supplying a corner case where ABS rings would be preferable. I should have finished with, if you offered ABS rings as an option...
aidandj is offline   Reply With Quote
Old 03-14-2016, 12:45 AM   #10
Ich verstehe nur Bahnhof
iTrader: (3)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 3,616
Total Cats: 305
Default

take my money
psyber_0ptix is offline   Reply With Quote
Old 03-14-2016, 01:11 AM   #11
Senior Member
iTrader: (1)
 
Onyxyth's Avatar
 
Join Date: May 2013
Location: Boyertown, PA
Posts: 714
Total Cats: 55
Default

This title:

Attached Thumbnails
Tapered Roller Bearing Hubs--IT'S HAPPENING-vwmin.gif  
Onyxyth is offline   Reply With Quote
Old 03-14-2016, 01:42 AM   #12
Senior Member
 
Join Date: Jan 2013
Location: Gilbert, AZ
Posts: 740
Total Cats: 91
Default

In.
Arca_ex is offline   Reply With Quote
Old 03-14-2016, 09:06 AM   #13
Senior Member
 
Join Date: Dec 2007
Location: ATL
Posts: 722
Total Cats: 47
Default

DAMN! something ELSE to buy... :/
rwyatt365 is offline   Reply With Quote
Old 03-14-2016, 12:39 PM   #14
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,457
Total Cats: 244
Default

Nice job Cord. Will these only be available from FM?
TurboTim is offline   Reply With Quote
Old 03-14-2016, 12:46 PM   #15
Junior Member
 
Join Date: May 2008
Location: Grants Pass, OR.
Posts: 449
Total Cats: 14
Default

I'm in, would even be a tester.
jmann is offline   Reply With Quote
Old 03-14-2016, 12:48 PM   #16
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 3,799
Total Cats: 337
Default

Hub is the same OD as stock, and will be machined to accept the stock ABS rings? If so then swapping them off stock ABS hubs is easy (3 jaw puller and a harbor freight press).

--Ian
codrus is offline   Reply With Quote
Old 03-14-2016, 05:06 PM   #17
Supporting Vendor
iTrader: (3)
 
Join Date: Jul 2006
Location: San Diego
Posts: 2,806
Total Cats: 423
Default

Very in. This is a must-have.
ThePass is offline   Reply With Quote
Old 03-14-2016, 05:34 PM   #18
Supporting Vendor
iTrader: (1)
 
Join Date: May 2010
Location: San Diego
Posts: 489
Total Cats: 37
Default

Drool worthy, I can't wait.
Lincoln Logs is offline   Reply With Quote
Old 03-14-2016, 05:36 PM   #19
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,245
Total Cats: 1,481
Default

Please make it not too pricey? Pretty please?
sixshooter is online now   Reply With Quote
Old 03-14-2016, 06:23 PM   #20
Junior Member
iTrader: (1)
 
Join Date: Sep 2009
Location: Colorado
Posts: 166
Total Cats: 5
Default

Quote:
Originally Posted by cordycord View Post
We can $upply rings. My thought was that if you're replacing your ABS hub, wouldn't you simply take off the existing ring and put it on the new hub?
that's what I was thinking.
GraemeD is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Miata Track Hubs: Custom design slammed200 Race Prep 64 07-31-2017 11:20 PM
MOMO Steering Wheel Hub VRRMPSH Miata parts for sale/trade 5 04-13-2016 10:35 PM
WTB: NA or NB Miata Shell / Roller Kevin S. WTB 5 03-20-2016 02:47 PM
Garage cleaning - Garrett T25 turbo and Megan Racing lowering springs bleezy Miata parts for sale/trade 0 03-06-2016 03:55 PM
Does anyone know of the vivid racing turbo kit? Stronghold1985 Prefabbed Turbo Kits 18 02-22-2016 11:33 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:44 AM.