Any interest in torque tube rebuild set?
02-13-2014, 08:00 AM
#1
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Any interest in torque tube rebuild set?
I will rebuild my TT in near future and have ordered custom TT bearing sleeve batch made of Delrin plastic (Acetal Copolymer Polyoxymethylene POM C) made to spec from clarks blueprint:
http://www.clarks-garage.com/shop-manual/trans-05.htm
Minimum order is 10 peaces @ $15 per piece and I have ordered them so I will have 6 extra if anybody is interested.
If there is more interest, I can order batch of 50 pieces, that would bring price in the $12 range.
I can also provide SKF Explorer 6006 C4 bearings with various types of seals. I decided to use 6006 C4 2RS1 (steel reinforced rubber seals), that are the best option in my opinion, but 2Z (steel both sides OE), 2RS (plastic both side) or any other type is also available.
Price per classic tolerance group bearing is less than 10€, price for C4 tolerance group is 15€. ($20)
Sleeves (10) will be made till the end of next week, bearings are available in one day, so if anybody wants a set of bearings and/or sleeves, one extra set is available next week.
http://www.clarks-garage.com/shop-manual/trans-05.htm
Minimum order is 10 peaces @ $15 per piece and I have ordered them so I will have 6 extra if anybody is interested.
If there is more interest, I can order batch of 50 pieces, that would bring price in the $12 range.
I can also provide SKF Explorer 6006 C4 bearings with various types of seals. I decided to use 6006 C4 2RS1 (steel reinforced rubber seals), that are the best option in my opinion, but 2Z (steel both sides OE), 2RS (plastic both side) or any other type is also available.
Price per classic tolerance group bearing is less than 10€, price for C4 tolerance group is 15€. ($20)
Sleeves (10) will be made till the end of next week, bearings are available in one day, so if anybody wants a set of bearings and/or sleeves, one extra set is available next week.
Last edited by Voith; 02-13-2014 at 05:35 PM.
02-13-2014, 08:20 AM
#2
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Thanks for posting this up, it's very tempting.
I've decided I will end up going with the Blacksea R&D Super Bearings for my project, however these look like a great choice as well
I've decided I will end up going with the Blacksea R&D Super Bearings for my project, however these look like a great choice as well
02-13-2014, 09:09 AM
#3
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Blacksea super bearings look very hot, but are a bit pricey.
Some info on "Explorer" class:
Some info on "Explorer" class:
While they may look like other bearings, SKF Explorer Performance Class bearings outperform all others. Tests have shown that when you replace an existing bearing with an Explorer Performance Class bearing, the SKF Explorer bearing will run quieter and up to three times longer. Which means...
Reduced maintenance costs
Higher productivity with increased machine uptime
Longer bearing life
Higher load carrying capacities
Less noise and vibration
SKF Explorer Performance Class bearings have expanded to include:
Spherical, cylindrical, spherical thrust, and taper roller bearings
Deep groove and angular contact ball bearings
Explorer bearings are dimensionally interchangeable with other bearings and are available in the normal assortment of open, sealed and shielded bearings.
Reduced maintenance costs
Higher productivity with increased machine uptime
Longer bearing life
Higher load carrying capacities
Less noise and vibration
SKF Explorer Performance Class bearings have expanded to include:
Spherical, cylindrical, spherical thrust, and taper roller bearings
Deep groove and angular contact ball bearings
Explorer bearings are dimensionally interchangeable with other bearings and are available in the normal assortment of open, sealed and shielded bearings.
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Tiger03447 (01-17-2020)
02-13-2014, 09:45 AM
#4
Nordschleife Master
That all sounds like marketing to me. The main item of failure on the TT bearings is the grease deteriorates with age. Not much you can do about that, bearings will always eventually fail due to grease degradation normally before any of the metal parts or seals fail.
02-13-2014, 10:17 AM
#5
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That is PR text so it is marketing for complete explorer range from one uk site. I found it while searching for meaning of "explorer" word on the bearing that old bearings don't have.
I hope they have some base for claims like that since they look quite bold.
I found some more info on deep groove bearing markings for SKF
http://www.skf.com/group/products/be...ons/index.html
This is what skf site says about explorer:
http://www.skf.com/group/products/be...ngs/index.html
I hope they have some base for claims like that since they look quite bold.
I found some more info on deep groove bearing markings for SKF
http://www.skf.com/group/products/be...ons/index.html
This is what skf site says about explorer:
Standard SKF bearings are well known for their superior quality and long service life. However, some applications must accommodate heavier loads while reducing friction, heat and wear in the bearing. For these applications, SKF Explorer bearings are the obvious choice.
Bearings in the SKF Explorer performance class have been shown to run cooler smoother, longer than non-Explorer bearings. SKF Explorer bearings, which were developed for more heavily loaded applications, are manufactured from extremely clean, homogenous steel that undergoes a unique heat treatment. The unique heat treatment provides an optimum balance between hardness and toughness. The internal geometry and cages have been optimized to reduce friction and wear. The surface finish of all contact surfaces promotes the formation of a hydrodynamic film.
02-13-2014, 10:43 AM
#7
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4 bushings = $60
4 bearings = $80
-----------
$140
Shipping is +/- $20 I guess, must check.
The usage of RS1 seals however is somewhat experimental, I was told by local SKF that it is the best option for this application. Factory used Z though.
4 bearings = $80
-----------
$140
Shipping is +/- $20 I guess, must check.
The usage of RS1 seals however is somewhat experimental, I was told by local SKF that it is the best option for this application. Factory used Z though.
Last edited by Voith; 02-13-2014 at 11:52 AM.
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02-13-2014, 03:09 PM
#10
Rainman
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JUDGING by that chart I'd say the RSL were best because water shouldn't be too big a concern, if you avoid deeeeep puddles and have the rubber plugs in the TT openings...
02-13-2014, 03:19 PM
#11
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Yup. Not available in 6006 2RSL C4 format though.. Could be custom ordered but forget about $20 per bearing in this case.
Friction rating of rs1 is based on new bearing and it loosens a bit with time, speed rating is not important because 6k rpm is no big deal for any seal. It is not considered high speed.
catamax: will reply @ home, phone wont open pms..
Friction rating of rs1 is based on new bearing and it loosens a bit with time, speed rating is not important because 6k rpm is no big deal for any seal. It is not considered high speed.
catamax: will reply @ home, phone wont open pms..
Last edited by Voith; 02-13-2014 at 03:46 PM.
02-13-2014, 07:02 PM
#13
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02-14-2014, 10:50 AM
#14
The big issue with rebuilding a torque tube is that not all of the bearing carriers will come out clean. Some get wedged/rusty/stuck in there and don't come out in a usable fashion.
I had to take apart 3 torque tubes to get enough good bearing carriers to rebuild mine.
This is the advantage to the Blacksea kit, its bearings and carriers!!
You will read all sorts of threads here where people say the bearings need to go in the exact spots the factory had them. I took apart 3 TTs and all 3 had the bearings in difference locations. They were "roughly" in the same areas.
The shafts were also not "perfectly" straight. Which led me to believe that they could benefit from an extra bearing to reduce shaft flex under power, vibes, etc. So when I put mine back together I used 5 bearings, equally spaced, along the shaft. Has worked well for the last 5 or so years.
Fwiw, I also used Delrin bushings.
I had to take apart 3 torque tubes to get enough good bearing carriers to rebuild mine.
This is the advantage to the Blacksea kit, its bearings and carriers!!
You will read all sorts of threads here where people say the bearings need to go in the exact spots the factory had them. I took apart 3 TTs and all 3 had the bearings in difference locations. They were "roughly" in the same areas.
The shafts were also not "perfectly" straight. Which led me to believe that they could benefit from an extra bearing to reduce shaft flex under power, vibes, etc. So when I put mine back together I used 5 bearings, equally spaced, along the shaft. Has worked well for the last 5 or so years.
Fwiw, I also used Delrin bushings.
02-22-2014, 09:17 AM
#15
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Sleeves arrived today and are perfect fit.
Ordered sets will be shipped on monday.
Big Thanks to Clark Fletcher of clarks-garage.com for providing accurate blueprint.
Ordered sets will be shipped on monday.
Big Thanks to Clark Fletcher of clarks-garage.com for providing accurate blueprint.
Last edited by Voith; 02-22-2014 at 09:34 AM.