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Two bearings that carry the same basic designation (for instance a 6205 ball bearing) but are not from the same manufacturer are guaranteed to be of the same basic type and to follow ISO standards for outside dimensions (inner diameter, outside diameter, width). That's all that is guaranteed...

Hello, Look into Kaydon ultra-slim bearings, with a cross section of 2.5 mm x 3 mm. See page 84 of the following PDF catalogue: https://www.kaydonbearings.com/downloads/catalog300/Kaydon_Catalog_300.pdf Dave

Hello, I would think SKF has a division in Spain you should be able to call. http://www.skf.com/es/our-company/skfespanola/ubicaciones/index.html...

The reduction of clearance caused by an interference fit is something available in the bearing engineering books. The rule of thumb I use is 80% of the interference between the inner ring and the shaft will become the reduction of clearance in the bearing. In your example, the 35 x 62 x 14 mm...

BEO = Both Ends Open (which means there are seals on each side of the housing) OEC = One End Closed (which means one side of the housing has a seal, the other side has an end cover)

There are various types of roller bearings. Cylindrical roller bearings only accept a couple minutes of arc of misalignment before having their performance affected. Spherical roller bearings can accommodate between 1.5 and 2.5° degrees of misalignment, depending on their series. You need to...

Hi Tmoose, I believe you are talking about these two articles written by Edward V. Zaretsky of STLE. Find below download links to the article (they are pretty good, worth a read): Part 1 Part 2 In the articles the author goes on to say (from my understanding) that there is no sound scientific...

and another http://www.turbomachinerymag.com/blog/content/back-basics-fluid-induced-instability-ie-oil-whirloil-whip

http://www.machinerylubrication.com/Read/754/oil-whirl-whip

I cannot find any deep groove ball bearings that can reach this speed. There are some that have a reference (thermal) limit of to 20 000 RPM. But their limiting (mechanical) limit is around 15 000 RPM. Either way, at these speeds, you will need high precision. Try to ask distributors or...

Hi Gee, Tough situation you are in. So, TIMKEN has increased the C value AND modified the L10m life calculation accordingly. Other manufacturers have kept the C value the same, and modified the L10m calculation accordingly. The modifications are different. This means that if you take the C...

It is reasonable to believe that all manufacturers have increased their load ratings by varying amounts, and only the manufacturer knows the true basic amount (calculated with the geometry of the rollers) and the increase they have applied. One thing you could do is ask TIMKEN if they can give...

History: There is an equation to determine the dynamic load rating "C" of a bearing. It takes into consideration only the geometry of the rolling elements in a bearing. Things like the number of balls or rollers, the diameter of the balls or rollers, the length of the rollers, the contact...

The typical abbreviation for bearing clearance is RIC (Radial Internal Clearance). I have never heard of TBC other than "to be confirmed" or "to be continued" which has nothing to do with bearing terminology.

Hi JJ, I would definately be interested in reading a paper on your findings, should you choose to publish them. I myself diagnosed pump failures recently, and in doing so communicated with two major pump manufacturers. They both indicated that some pumps are designed so that ideally the net...

Hi Mike, I'm interested by your response. How has this rule of thumb served you in the past (just double the amount of time someone says it will take)?

Another vote for fretting corrosion. Follow EASA or bearing manufacturer fit standards for the bearing size and type.

In my opinion, the first thing to determine is: Is the spalling caused by surface initiated fatigue or subsurface initiated fatigue? Surface initiated fatigue is linked to abrasive wear and surface distress typically caused by inadequate lubrication or contamination. It will look like the...

JJ, H6 is standard in most pumps for the housing bore tolerance. So your shaft and housing fits appear to be good. Please find the attached PDF from SKF detailing the different options (covers BECBM, BEGAM, PumPac, etc.)...

The k5 machining tolerance on the shaft is typically standard for centrifugal pump applications. What tolerance are you using in the housings? I know you are thinking preload is leading to issues in the bearings, however, I have heard that BEGAM paire angular contact ball bearings (CB = normal...