What do bearing designation numbers mean?

Digit-by-digit explanation of METRIC bearings with examples. Some optional manufacturer specific letter and number codes also explained briefly.
Same designation data is found at: www.skf.com/ca/...
For more on bearings, see: www.skf.com/bin...

[@guidepost1043]

Without this video, I would not have thought to go look for the related information. Thank you for the insight. Previously, I blindly took a picture of the bearing and numbers, and submitted a purchase request. So the 3rd digit Series number is in some way related to the progressively larger dimension that you referred to; robustness. I respect that you did not know what it referred to exactly, but you did see the causal relationship. You did indicate your uncertainty related to that position designation; and I respect that you understand how to usefully share questionable information. That is how useful Common Sense works. A group of people with developed self-respect, contribute to a solution; productively indicating where they are unsure of gaps in knowledge, or uncertainty of relationships. The other team members help fill in the gaps where they are able, and similarly with developed self-respect indicate where what they contribute is uncertain. Together, as a group, we produce a more complete picture than what we previously knew. I appreciate the effort you took, and the quality in conveyance of information I received. I also appreciate the contributors that filled in the gaps related to the 3rd digit relating to robustness and series. Outright ridicule, contempt, unjustified emotional criticism, drama, or unrealistic expectation for completeness, are indicators of people who have difficulty contributing to the Common Sense of group efforts. This is KZbin, not Wikipedia or a university course. Often while taking classes I would find discrepancies in textbooks, instructor provided information, and incorrect exam answers keys. That does not mean they were not useful in providing greater overall understanding. Instructors share useful insights to help broadly relate to systems of information. Virtually nothing anyone can say is a truth; it depends upon the constraints of the system being considered. But of what use is it to disregard everything presented; instead common sense uses information for the best overall benefit. Thank you theoverengineer for your video. Guidepost.us

[@theoverengineer]

Much appreciate your input, thank you Guide Post.

[@absshm]

The third Digit represents the duty for it will be used. For example. Extreme light load carrying bearings will start from 0-1 and high load will go from 4-5 and so on.

[@theoverengineer]

Not for any of the metric bearings, ISO, DIN, JASO etc.. What standards are you having in mind? What`s the standard number?

[@parthprajapati53]

i think may be you are right because in mostly Indian bearings the 3rd digit stands for the duty of its use..like if the code is 3 that means it should be used for medium load.

[@juicy6669]

Higher load is identified with either c3 or c4 depending how much they need to expand at higher loads

[@1grizzlyrizzo]

Thanks for the thrilling information, well thrilling for an engineering design student.

[@Nik0lay11]

You have a mistake, actually 00=10mm, 01=12mm, 02=15mm, 03=17mm (you have 01=10mm, 02=12..)

[@sonaprajapati287]

anand mechanic

[@volroll]

Yes.03 is 17 mm.618..=68...618/7=687

[@ferozhassan6417]

Visit my video kzbin.info/www/bejne/ZmKWgXp3ipuYntU

[@hard6guard]

Sorry but there is a mistake , 00=10 mm , 01= 12 mm , 02= 15mm , 03= 17 mm . As it was in the SKF table shown in the video

[@theoverengineer]

Good catch, at what time was it? (I`ll try to fix it)

[@hard6guard]

Your mistake @ 2:55 and the correct data @ 5:25

[@theoverengineer]

Thank you for taking the time for finding it and sharing. You are right, there is a numbering mistake, I`ll figure out how to edit it somehow or re-shoot. Thanks again.

[@hard6guard]

You are welcome :) I'd like to thank you for making such useful videos

[@robertmccully2792]

Good video,, be nice if you read off all the numbers on the bearings and than found replacement in catalog.

[@Kkkppp9922]

My Bearing is 6205 2RS so when I Multiple the second 2 digit I get 25. So 25mm inter diameter

[@Ejhayexploration]

What can be the size of the bearing of 10mm inside diameter 37mm outside diameter That is one bearing And this is the other one 10mm inside diameter 35outside diameter

[@guitartec]

I could be wrong, but I believe the third digit (right to left) is the series, which reflects the robustness of the bearing. The series from lightest to heaviest are; 8- Extra thin section 9- Very thin section 0- Extra light 1- Extra light thrust 2- Light 3- Medium 4- Heavy

[@theoverengineer]

Could be with some brands, I was following SKF literature

[@guitartec]

You may want to change your title to "What do SKF bearing designations mean".

[@theoverengineer]

SKF core specs and designations meet ASTM, JASO, DIN and other standards, some other letters and digits are optional and manufacturer specific. Video deals with common core designations, hence the exact title.

[@guitartec]

Let's just leave it at.... neat video!

[@theoverengineer]

OK, thanks for watching and commenting!

[@shazsaan]

hi, can you give me link where i can download this chart. i wonder

[@stefanpariyski3709]

Except for the information about determining inner diameter and radial play, I find the rest misleading or partially/completely wrong. Especially the part about what the third number means. The 60xx, 62xx, 618xx, etc. refers to the bearing series and nothing else. The only conclusion, that can be drawn is that there is an order to these series, in which the load rating rises for given shaft diameter. Engineers understand and read "those things", it's our job after all to choose the best compromise of parameters, that suits a particular situation. And few of us are suicidal.

[@theoverengineer]

Make sure you talk to SKF as they printed their company material wrong, on which engineers base their calculations. They all are making a mistake in their work.

[@stefanpariyski3709]

And you know that how? Have you ever done experiments of your own to make a model of a bearing and then prove it on a test stand? Because that is how the "wrong" formulas are derived, not based on couch science. Plus the same method of calculating bearing life and loading is taught in university by people who research these topics. You want to tell me these scientists also have no idea what they are doing?

[@stefanpariyski3709]

"I don't know anything..." That about sums it up...

[@theoverengineer]

Not really. Summing up would come from SKF or a bearing expert like yourself explaining how and why SKF`s material is " misleading or partially/completely wrong" .

[@Srk7028]

@@theoverengineer SKF also misleading it's designation number.They says 2nd and 3rd digit from left indicates "dimension series" in which The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D).What bullshit is this ??

[@davidmiriru9425]

Can I get a chart like the one you're using in this video please

[@ajaykumar-zn4jh]

There is a bearing whose model no. is 2036 and its bore dia is 20mm then hw can you say just multipli the last two digit with 5 to find out bore diameter.

[@theoverengineer]

Google any bearing manufacturer, deep groove ball bearings, like rbc.

[@GT1GO]

Good info. Thanks

[@FernandoDIY]

TS2-SX03A43NCS11 this is on my bearing how do i work this one out

[@theoverengineer]

That's a part number, not a bearing designation

[@gyansetu8096]

How do you find number of balls inside the bearing. If ID and OD given

[@theoverengineer]

Only from manufacturer's specs. No math relation.

[@natureenthusiast660]

You have a chart in this video, send me the chart link please

[@theoverengineer]

Click the link in the video description box

[@DragonsREpic]

but that's metricI need a sheilded ball bearing OD is around 1-3/32"

[@snnmurtay7925]

NICE VIDEO ,iTS VERY HELPFUL

[@bigstuff52]

Thanks for the info...make it easier for me doing some pulleys on combine..Thank you...

[@ranjanpal7217]

Amazing explanation...Just one query..How can we know no. of balls in the bearing and their ball diameter ?

[@girishnaik8071]

Hi...........nice video..... for my project i want a bearing having following condition ...can u suggest me bearing no.???? (generally a bearing should have housing ) 1.ID=12mm 2.OD = ANY dimension 3. low load and (with rpm 400) And it has to hold shaft having weight of 1.3KG 4. very very smooth to rotate the shaft.

[@theoverengineer]

+girish naik Any steel bearing is strong enough. Go to a LOCAL supplier and try out some and see which are smooth enough. Very very smooth is hard to look up without a number describing levels of smoothness.

[@girishnaik8071]

thanks but can u suggest me bearing no. for id of12 mm

[@theoverengineer]

Get a bearing catalogue and start reading it.

[@girishnaik8071]

ok

[@atxjax1]

Hi. I have a automotive pulley that uses a NSK 6203DU bearing. I want to replace it with a higher quality bearing so I got a SKF 6203-2ZJEM. Any possible issues I may run into?

[@theoverengineer]

Jackson Cruz Nothing major. NSK is a top-of-the-line Japanese bearing, SKF is considered the best in the world, has better quality control - or so I hear. The DU is a light bearing with a pressed steel cage and a single-contact seal, made with an average radial clearance of 0.0008 inch (ISO stuff) The SKF has a steel cage and is an electric motor grade (means lower friction, is rated to take 200lb more dynamic load and can spin about 10% faster max 19,000 rpm. It may not have the oil seal on it at the point of sale.

[@atxjax1]

theoverengineer Thanks for the info. The SKF according to a spec sheet I reviewed has double metal shields. I'm going to go ahead and use it in my automotive pulley as clearly it is a better pulley than the NSK. Thank you for your reply.

[@petebrayshaw2360]

Only issue is replacing a rubber sealed bearing with a metal shielded is you cannot protect against moisture ingress only dirt. SKF v NSK? No genuine argument to favour one against the other.

[@mohamedelmahdy706]

1st thanks for this helpful video and second do you have a pdf copy of the table you are explaning from ??

[@ahsafetech]

I have need also

[@sanyasiraosenapathi3164]

Pl elabrate the Brg NUMBERING . It is good. Regards S S Rao

[@theoverengineer]

+Sanyasirao Senapathi Numbering comes from manufacturing tradition and is only loosely related to physical size. The available forming dies they had just got sequentially numbered and those became part of the bearing designations with only a loose relation to actual size. Similar case is sandpaper grit numbers, wire gauges and sheet metal gauge numbers. With wire and sheet, the gauge numbers loosely relate to number of passes through forming dies, abrasive grit numbers somewhat relate to the number of openings in a sieve per some area abrasive particles pass through.

[@shantilalpatel5250]

Bearing number Ls13 mean what's

[@popitn2nd]

Can you give me the measurement for this one please!? 206RS it is the only code number i see

[@theoverengineer]

Measurements is something you do since you have the bearing.

[@محمدالشيخ-ق9ش]

I think the size it in 30 Out side 62 Thinks16

[@paragagnihotri3459]

As far as I can tell from the code is it has rubber seal on one side with inner dia (bore) 30mm. If you really want it's designation try googling it.

[@ptcman8267]

why the code system is so stupid like this :/...... Isn´t possible to make a more intuitive system ?

[@theoverengineer]

Good question. Current bearing code system apparently comes from manufacturing dimensions specs. They would run out of cutesie names like "Big bearing, Maxi, Mini, Fatso, Double wide ..." pretty soon. Simple naming systems work well when only a few sizes are manufactured, like battery sizes, light bulb socket sizes, screwdriver bit sizes, ... Hope that makes some sense, thanks for watching.

[@EvelioPerez]

I think my PTC friend on top meant "intuitive" as in: a 10mm ID by 62mm OD bearing named as "6210" for example. That would be more "intuitive" than finding a code in a book somewhere. For someone that does not use these codes on a consistent basis I can see howit could be confusing.

[@theoverengineer]

Totally ...

[@SiboBushings]

interesting video!

[@renatanirman194]

Can you please expalin me detail of bearing 22317MBW33

[@theoverengineer]

Not as such.What brand is it?

[@renatanirman194]

Actually i m unknown abt brand because it is open

[@petebrayshaw2360]

It’s a double row spherical roller Bearing, 85mm id with a brass cage and lubrication groove in the outer race

[@tomasmitsis2514]

@@petebrayshaw2360 M=Masif, w33= outside groove, B=? what does it mean?From your answers you are the most bearings experienced here.

[@luoyangbobiprecisionbearin986]

The thin section bearing has another numbering system.

[@kirtianandsolanki2722]

sir ji kisi bearing ka no nhi pta h to kese pta kre uska no. plss btaiy

[@vahagnmelikyan2906]

Csb204-12N what this means?

[@petebrayshaw2360]

Vahagn melikyan different type of Bearing, this is an insert bearing of similar dimensions to a 6204 but with an extended inner with a grub screw to lock into the shaft. The 12 indicates 12/16 bore so 3/4” 19.05

[@vahagnmelikyan2906]

@@petebrayshaw2360 thanks so much 👍

[@vahagnmelikyan2906]

@@petebrayshaw2360 what is wjb B-312 on bearing, because search engine gives me Csb204-12N instead

[@navneetjha2]

please correct you have made mistake in bearing no 00 is 10 and 01 is 12 wrong in ur video

[@theoverengineer]

As has been overlabelled since 2014

[@govindaraj8807]

navneet kumar Jha

[@yadfaruq5294]

very nice could you send me this table of bearing please

[@milkmanpeter]

are all bearings metric

[@theoverengineer]

No.Inch bearings designations are totally different.

[@stalinnadar4191]

really helpful

[@muhammedarfin1875]

Thanks Sir

[@hassanjinja]

Hello Members, Kindly Advise me where Can I Buy Original TR BEARINGS Br

[@theoverengineer]

Phone them and ask

[@NiazAhmedHasib]

tell me your bearing number i might help u.

[@theoverengineer]

Thanks for helping out. Or trying.

[@NaushadAli-vg2eo]

well defined

[@brigittehuang8860]

thank you very much

[@hegeorge756]

hello, are you there? can we discuss the bearing business?

[@jameswarbrick9168]

a bad explanation of bearing dimensions

[@theoverengineer]

Video`s topic is NOT explaining bearing dimensions. It is also NOT about bearing sizing or measuring bearings. Like the title and description clearly state, the video is about the meaning of bearing designation numbers, digit-by-digit, including some selected manufacturer specific code briefly. Completely different topic altogether.

[@Elsanta666]

some what helpful..the outside diameter wasnt explained clearly..i got confuse.lol

[@theoverengineer]

That happens. What detail was unclear?

[@arvindpatil3140]

oil seal dimension is easy to read. Bearing dimension disgusting .

[@theoverengineer]

Oil mess disgusting. Book easy to read.

[@GRumi-wx6cv]

00 =10 mm

[@sidsification]

camera shifts are irritating

[@theoverengineer]

sorry, old vid ... old tech

[@prerakbhatt9406]

thanks

[@عاوزافهمليهكدا]

اود ترجمه الفديوهات بالعربية وشكرا لسيادت

[@theoverengineer]

17/5000 المضي قدما في ذلك.

[@عاوزافهمليهكدا]

theoverengineer شكرا جزيرا او الترجمه من الانجليزيه الى العربيه لان العالم بمختبف لغاته يشاهد فديوهات سيادتك وعبقريتك لا تحددها بلغه واحده بل بمعظم اللغات

[@rofa9001]

thanks too much

[@erichale4275]

I hope people aren't trying to learn from this.

[@theoverengineer]

I sure hope so, too. Video is not mean to replace a degree in mechanical engineering.

[@cosast54]

you tire me😕

[@theoverengineer]

tragic

[@dickvandenberg3842]

Bearing measurements explaind totally wrong! Go back to school ! 00=10mm 01=12 mm at 05 begins the normal counting , last two digits multiply by 5 !

[@theoverengineer]

Dick Van Den Berg Discuss with SKF bearing manufacturer, see how that goes.

[@petebrayshaw2360]

Dick is correct re the 00 01 02 03. 10mm 12mm 15mm and 17mm. Bore then starts with 04 on the x5 method. Video is incorrect, a 6001 has a 12mm bore