Specifically *which* 6201 is the suitable replacement? the search results seem inconclusive and there is no consensus to be found. There are 6201-RS, 2RS, Z, deep groove, etc etc etc. Different RPM ratings and so forth. Does it really matter as long as it's a quality sealed bearing?
thanks
Refer to this,
http://www.ducatimonsterforum.org/index.php?topic=67379.0 (http://www.ducatimonsterforum.org/index.php?topic=67379.0)
Quote from: Darkmonster620 on July 14, 2014, 09:44:43 AM
Refer to this,
http://www.ducatimonsterforum.org/index.php?topic=67379.0 (http://www.ducatimonsterforum.org/index.php?topic=67379.0)
I did see that Carlos, but yours was the only comment that addressed it at all so I was hoping to get a little more. Can you clear up how you determined that with a reference of any sort? is this information you received from Ducati or someone else? Not that I doubt you but I wanted a little more consensus than one post.
Actually to put it another way, I'd like to know if there's any reason a bearing simply labeled as 6201-RS from a reputable bearing manufacturer wouldn't be sufficient.
Also, most bearings list RPM limitations, but rarely do they list specific RPM *ranges*.
There was a thread that, I can't find for the time being, it did mention that the one in the range of 16 000RPM was OK . . .
As long as the bearing is the correct one, Timken, FAG, NTN, Koyo or whoever, it should be fine . . .
I'll do a little more looking . .. I think I have something at home . . .
6201-RS from a reputable bearing manufacturer
That's all you need.
Specifically, 6201 with seals.
Really not trying to belabor the point here...but I would like to know, if possible, the specific spec of the OE bearings. I mean, given that I have a choice I may as well get the "correct" ones...
Quote from: Buck Naked on July 14, 2014, 01:16:42 PM
Really not trying to belabor the point here...but I would like to know, if possible, the specific spec of the OE bearings. I mean, given that I have a choice I may as well get the "correct" ones...
What 'specific' specs are you looking for? A 6201 2RS from Timken is going to be pretty much the same as a 6201 2RS from SKF etc
Quote from: Ddan on July 14, 2014, 02:49:57 PM
What 'specific' specs are you looking for? A 6201 2RS from Timken is going to be pretty much the same as a 6201 2RS from SKF etc
I really don't know what end digits mean, aside from RS which is "rubber seal". ABEC3, USBB, Z, 2RS-H, etc etc. I realize identical numbers are going to be the same across brands. See my op.
From what I gather they determine things such as load rating, rpm range, rpm limit etc.
The 6201s that are sold for clutch throw out bearings are different than the ones sold for tensioners. The only thing they have in common is the size.
If nobody knows, that's fine. I'm just curious and would like to get the bearing Ducati intended.
Buck,
This was what I was looking for and found it, I know it is somewhere hidden in this "NON OEM Parts thread" somewhere, but, I copy pasted it; thats why in my first answer I said 0-16 000RPM, here the references are for SKF bearings, but, as Ddan said, is the same for ALL manufacturers.
Here in Panama I am limited to SKF, FAG, Timken and NTN . . . the rest, I dunno where they coming from and I must admit, I'm a "little brand conscious", since HERE this is the most reliable info on the quality of what I am purchasing. I did replace these bearings on a customer's bike and used NTN brand, cheaper than SKF/FAG/Timken and were readily available
Front wheel bearings (for 25mm front axle):
Ducati part # 75132.2566 - SKF 6005-2RS (25 x 47 x 12)
Sprocket carrier bearings:
Ducati part # 75132.2566 - SKF 6005-2RS (25 x 47 x 12)
Rear wheel bearings (for 25mm rear axle):
Ducati part # 75162.3075 - SKF 6006-2RS (30 x 55 x 13)
Clutch throwout bearing:
Ducati part # 702.5.016.1A - SKF 201-2RS2/LHT23 (12 x 32 x 10)
Edit: Looking at the SKF site, there's two listed bearings for the belt tensioner. 6201-2RSL & 6201-2RSH. The difference appears to be the speed ratings. The H is rated 0-15k rpm, and the L is rated 5k-26k rpm. 0-15krpm is the right range.
Just in case, I also have these PNs:
Head bearings
Timken:
L44613 Outer race
L44645 Bearing
FAG:
509592A Outer race
509590A Bearing
SKF:
639172 Outer Race
639174 Bearing
Yeah it would be a tad silly to go with cheap bearings although they are crazy cheap, 10 pack for $12 from a sweatshop and more than the cost I am oddly fascinated with Chinese parts. If the cost of failure wasn't so high I'd risk it simply because those bearings don't appear to do much work. I think the SKF are only $6 each.
The RPM rating is what I'm curious about, I just wonder what the source of the; 0-15 being the "correct" range. SKF is the only brand I can find that even utilizes that series of numbers. Someone posts that information on the board and it magically becomes a fact after being repeated a few times, ya know? Like I said I'm just curious. I don't think I'm going to blow up my engine no matter which one I choose.
Thanks for digging up all that info.
P.S the NTN are kinda cool because they're the only ones I've seen with red seals. ;)
The rollers turn at ~ crankshaft rpm, so the 0-15krpm rated bearings are more than adequate.
RS in general means Rubber Seals.
There's different kinds, depending on what the operating requirements are.
Z is a shield.
Generally not good for moto use.
6201 are by definition deep-groove ball bearings.
Quote from: Speeddog on July 14, 2014, 08:26:35 PM
The rollers turn at ~ crankshaft rpm, so the 0-15krpm rated bearings are more than adequate.
Understood but that isn't what is unclear. One is 0-15 and another is 5-xx. I'm wondering what makes one appropriate as opposed to adequate. Just some SAE type stuff I'd like to see explained so I can possess some useless bearing smarts. ;) so far everyone seems to feel that any sealed 6201 is adequate. Hell maybe this is such minutiae that no engineer at Ducati even cared, but if they did I'd like that know.
you're asking a question that no one can answer, because there is no ducati spec. it's just a bearing.
if you want the exact thing ducati specify, buy it from ducati. then piss and moan about how much it cost because it's just a name brand 6201 2rs c3.
Quote from: brad black on July 16, 2014, 02:09:52 AM
you're asking a question that no one can answer, because there is no ducati spec. it's just a bearing.
if you want the exact thing ducati specify, buy it from ducati. then piss and moan about how much it cost because it's just a name brand 6201 2rs c3.
You just answered it! (Sort of) [thumbsup] they're $16 each if I only got one to find out. Unless that is a sequence of digits from an OE bearing? All I'm sayin is it would be nice to know the exact OE replacement. Obviously the general attitude is that it doesn't make the beast with two backsing matter, which is also helpful, lol.
Takin one for the team over here, again :P
When you cross reference bearings from one manufacturer to another if the number is correct the s[pecs (at least theoretically since quality can differ) the specs are the same.
2rs is a generic code for sealed, but with nsk bearings they use vv to mean the same thing.
ddu seals are double contact, which i use for wheel bearings. they are also usually brown or orangish seals, whereas 2rs are black.
Quote from: brad black on July 16, 2014, 04:42:25 PM
2rs is a generic code for sealed, but with nsk bearings they use vv to mean the same thing.
ddu seals are double contact, which i use for wheel bearings. they are also usually brown or orangish seals, whereas 2rs are black.
Cool thanks. I just ordered some Nachi 6201-2NSE, orange seals, made in Japan with a really techy description.
" Advanced Seal Design Provides
Excellent Protection and Smooth Operation
The combination of a unique lip design and seal groove provides a labrinth and steady seal contact. Breathing mechanism avoids torque increases caused by internal pressure variation due to changes in operating temperatures. NSE seals allow NACHI bearings to have constant smooth operation and long service life."
I like being "sold" on things and an odd stereotype that the Japanese make the best bearings lived in my head for some reason.
i'm pretty sure 2nse is the same as ddu. colour would indicate that too.
Those cambelt tensioner bearings are probably the least stressed bearings that are used in any mechanical application :-) They are handling NO axial load and absolutely MINIMAL radial load.
As long as you are using sealed bearings which will handle a bit of an external dust environment WTF are you worried about ? ? ?
Quote from: WTSDS on July 19, 2014, 03:25:35 AM
Those cambelt tensioner bearings are probably the least stressed bearings that are used in any mechanical application :-) They are handling NO axial load and absolutely MINIMAL radial load.
As long as you are using sealed bearings which will handle a bit of an external dust environment WTF are you worried about ? ? ?
Quote from: Buck Naked on July 14, 2014, 07:44:24 PM
The RPM rating is what I'm curious about, I just wonder what the source of the; 0-15 being the "correct" range. SKF is the only brand I can find that even utilizes that series of numbers. I'm just curious. I don't think I'm going to blow up my engine no matter which one I choose.
:)
Quote from: OneTrack on July 14, 2014, 05:27:22 PM
Clutch throwout bearing:
Ducati part # 702.5.016.1A - SKF 201-2RS2/LHT23 (12 x 32 x 10)
now that the original question has been answered..
when I needed one of these, i went to my local ducati dealer, knew I'd get bent over on that bearing but I didn't mind if it wasnt TOO bad. guy looked up the price on that bearing it was $20 something. He and I both had a good laugh at that, then he said "here, let me write down the dimensions for you, any bearing that size should be fine." there's a thread here somewhere about it, when I fried my clutch slave.
Found them local for like $5, bought two in case I screwed up. vxb.com was actually between home and work so I did will call and got them on the way home one day.
They're 10 for $10 on Amazon.
i take it back. I looked in my old thread. dealer wanted $62 for one 6201 bearing.
10 for $10 at amazon? i suppose that's a good deal. I prefer to spend local. I was just happy I didn't spend $62.
$62... I'd laugh if that wasn't attempted robbery
Currently at Ducati they're listed as a 70240691a, price ~$17.
Which doesn't mean that a dealer didn't try to get $62 for it at some point....
I'm pretty certain that by contract dealers are required to sell OEM parts.
There are repair and parts warranty implications involved.
the complete adjuster is $95 locally.
Quote from: Speeddog on July 19, 2014, 11:29:16 PM
Currently at Ducati they're listed as a 70240691a, price ~$17.
Which doesn't mean that a dealer didn't try to get $62 for it at some point....
unless he wasn't looking at the right part number in the exploded diagram. all I know is what I asked for and what he quoted me.
Dealers do make up prices. Suggested retail is...a suggestion. At least one factory owned dealer I know of charges over suggested retail on some parts.