Question about the cam tensioner 6201 bearings

[Rudemouthsky]

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

[DarkMonster620]

Refer to this,

http://www.ducatimonsterforum.org/index.php?topic=67379.0

[Rudemouthsky]

Refer to this,

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*.

[DarkMonster620]

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 . . .

[Speeddog]

6201-RS from a reputable bearing manufacturer


That's all you need.

Specifically, 6201 with seals.

[Rudemouthsky]

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...

[Ddan]

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

[Rudemouthsky]

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.

[DarkMonster620]

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.

[DarkMonster620]

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

[Rudemouthsky]

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.

[Speeddog]

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.

[Rudemouthsky]

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.

[brad black]

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.

[Rudemouthsky]

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)  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