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7/27/2019 URB Catalogue
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General Catalogue
No. A2007E, November 2007.
Printed in Romania on environmental friendly recycled paper.
Reproduction of this catalogue without written concent is strictly prohibited.
Every care has been taken to ensure the correctness of this catalogue informational content, but
no liability can be accepted for any errors or omissions. 1
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Foreward
This General Catalogue is a very thorough and detailed bearing catalogue. This Catalogue
contains almost all the standard rolling bearings required for industrial, automotive and
agricultural applications for industrial product manufacturers as well as for replacement
purposes. In addition for special applications which includes non standard bearings
requirements have also been included extensively according to their sizes and constructivedimensions.
The Technical section of this catalogue includes general technical data available for all types
of bearings with regard to selection of bearing type, size, tolerances, frictional movement,
lubrication, life rating and other technical informations essential for bearing designing and its
applications.
This catalogue is useful for all designers and experts in machines, equipments, bearings
mounting and dismounting, operations and maintenance. Incase these bearings do not meet
user requirements and needs of rolling bearings, our qualified technicians and engineers willbe at your service to help provide a suitable solution for your needs.
The Technical section is followed by bearing tables. These bearing tables are classified as
per bearing construction types and listed in according to their bore diameter. Brief
technical description introduces these bearing tables which are useful for bearing selection.
Basic dynamic and static loads have been calculated as per ISO calculation guidelines. Axial
and Radial Clearance are also up to date. All sections are arranged in an order which is usually
followed by design engineers.
This catalogue is one of the advantages which we provide to our customers. In addition there areseveral benefits and values such as simplified bearings selection, short lead times, availability,
engineering knowledge and expertise and many other values which will help in making us the
supplier of choice.
We are confident that you will find this catalogue useful in the selection, use and maintainence
of rolling bearings. We thank you for your support and look forward to continuously serving and
updating you for all your future requirements.
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Designations (Figures)
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Designations (Letters)
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Technical Section
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Contents
SELECTION OF BEARING TYPE Selection of bearing type considering the magnitude and direction of load Selection of bearing type considering the alignment between shaft and housing Selection of bearing type considering the operating temperature Selection of bearing internal clearance Bearing types and technical characteristics Selection of bearing type Performance comparison of bearing type
SELECTION OF BEARING DIMENSION Basic load ratings Bearing life
Bearing rating life Dynamic load and variable speed Basic dynamic load of a bearing group Adjusted rating life Static load
BEARING FRICTION
LIMITING SPEED
BEARING TOLERANCES Radial bearings (excepting tapered roller bearings) Tapered roller bearings
Tapered bore bearings Mounting chamfer dimensions tolerances
BEARING MATERIALS Chrome-alloy bearing steels Case-hardening steels Heat treatment steels Bearing cages
BEARING APPLICATIONS Locating bearing and non-locating bearing Recommendation for bearing fits selection Deviations of form and position
Bearing axial location Bearing sealing
BEARING LUBRICATION Grease lubrication Oil lubrication
BEARING DESIGNATION
EXAMPLES OF BEARING CALCULATION
BEARING MOUNTING Mounting of bearings with cylindrical bore
Mounting of bearing with tapered bore Bearings dismounting
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
1212121313131415
181818
1823262628
30
33
373946
5152
5454545555
56565775
7778
818185
89
91
102102
104105
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108148164214250300308315316326338342
348392406418
Deep groove ball bearingSelf-aligning ball bearingsAngular contact ball bearingsNeedle roller bearingsTaperad roller bearingsCrossed tapered roller bearingsSpherical thrust roller bearingsBearing for various applications - Deep groove ball bearings with spherical outer ring and extended inner ring - Bearings for textile machines - Water pumps bearings - Bearings for cardan drives
Slewing bearingsBearing housing unitsAccessoriesRolling elements
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1. Selection of bearing type
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Selection of bearing type
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Performance comparison of bearing type
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2. Selection of bearing dimension
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3. Bearing Friction
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4. Limiting Speed
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5. Bearing tolerances
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6. Bearing materials
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7. Bearing applications
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8. Bearing lubrication
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9. Bearing designation
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10. Examples of bearing calculation
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11. Bearing mounting
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107
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Deep groove ball bearings
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115
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Snap ring groove dimensions and tolerance
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Snap ring groove dimensions and tolerance
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings
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Single-row deep groove ball bearings with lling slots
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Single-row deep groove ball bearings with lling slots
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Non-standard Single-row deep groove ball bearings
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Non-standard Single-row deep groove ball bearings
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Non-standard Single-row deep groove ball bearings
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Non-standard Single-row deep groove ball bearings
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Non-standard Single-row deep groove ball bearings
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Non-standard Single-row deep groove ball bearings
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Non-standard Single-row deep groove ball bearings
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Double-row deep groove ball bearings
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Magneto ball bearings
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Magneto ball bearings
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Self-aligning ball bearings
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Self-aligning ball bearings with adapter sleeves
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Self-aligning ball bearings
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Self-aligning ball bearings
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Self-aligning ball bearings
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Self-aligning ball bearings
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Self-aligning ball bearings
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Self-aligning ball bearings with extended inner ring
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Adapter assemblies for Self-aligning ball bearings
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Adapter assemblies for Self-aligning ball bearings
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Angular contact ball bearings
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Single-row angular contact ball bearings
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Single-row angular contact ball bearings
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Single-row angular contact ball bearings
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Single-row angular contact ball bearings
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Angular contact ball bearings (Matched Pair)
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Angular contact ball bearings (Matched Pair)
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Angular contact ball bearings (Matched Pair)
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Angular contact ball bearings (Matched Pair)
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Angular contact ball bearings (Matched Pair)
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High precision single-row angular contact ball bearings
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High precision single-row angular contact ball bearings
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High precision single-row angular contact ball bearings
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High precision single-row angular contact ball bearings
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High precision single-row angular contact ball bearings
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High precision single-row angular contact ball bearings
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High precision single-row angular contact ball bearings
(Matched pair)
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High precision single-row angular contact ball bearings
(Matched pair)
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High precision single-row angular contact ball bearings
(Matched pair)
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High precision single-row angular contact ball bearings
(Matched pair)
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High precision single-row angular contact ball bearings
(Matched pair)
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High precision single-row angular contact ball bearings
(Matched pair)
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High precision single-row angular contact ball bearings
(Matched pair)
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High precision single-row angular contact ball bearings
(Matched pair)
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High precision single-row angular contact ball bearings
(Matched pair)
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Non-standard single-row angular contact ball bearings
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Non-standard single-row angular contact ball bearings
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Non-standard ball and cage assemblies for bycicles
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Angular contact ball bearings
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Double-row angular contact ball bearings
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Non-standard double-row angular contact ball bearings
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Needle roller bearings
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Needle roller bearings
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Non-standard needle roller bearings
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Needle roller bearings without inner ring
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Non-standard needle roller bearings without inner ring
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Drawn cup needle roller bearings
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Drawn cup needle roller bearings
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Drawn cup needle roller bearings
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Non-standard drawn cup needle roller bearings
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Non-standard drawn cup needle roller bearings
Non-standard drawn cup needle roller bearings
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Needle roller and cage assemblies
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Needle roller and cage assemblies
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Needle rollers and cage
assemblies for connecting rodapplications
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Support rollers, cam followers and
rolling mill support rollers
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Support rollers
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Cam followers
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Tapered roller bearings
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Single-row tapered roller bearings (Metric Series)
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Single-row tapered roller bearings (Metric Series)
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Single-row tapered roller bearings (Metric Series)
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Single-row tapered roller bearings (Metric Series)
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Single-row tapered roller bearings (Metric Series)
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Single-row tapered roller bearings with anged outer ring
(Metric Series)
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Single-row tapered roller bearings (Paired mounting)
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Non-standard single-row tapered roller bearings
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Non-standard single-row tapered roller bearings
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Non-standard single-row tapered roller bearings
(Inch Series)
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Non-standard single-row tapered roller bearings
(Inch Series)
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Non-standard single-row tapered roller bearings
(Inch Series)
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Non-standard single-row tapered roller bearings
(Inch Series)
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Non-standard single-row tapered roller bearings
(Inch Series)
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Double-row tapered roller bearings (Metric Series)
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Non-standrard double-row tapered roller bearings
(Metric Series)
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Non-standrard double-row tapered roller bearings
(Inch Series)
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Non-standrard double-row tapered roller bearings
(Inch Series)
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Four-row tapered roller bearings
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Non-standard four-row tapered roller bearings
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Non-standard four-row tapered roller bearings (Inch Series)
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Tapered roller thrust bearings
Tapered roller thrust bearings
Tapered roller thrust bearings have the same parts
as cylndrical roller thrust bearings. They are manu-
factured in two constructive versions, i.e. with ta-
pered raceways on both washers or on only one. The
rollers are radially guided by the rib of one washer.
These bearings can also be manufactured in the ver-
sion without cage. In this case, they have maximum
axial load carrying capacity.
Tolerances
Tapered roller thrust bearings are generally manu-
factured to the normal tolerance class and P6 and
P5, at request. The values of the tolerances for d and
D are give on page 37.
Tapered roller bearings are fitted with machined
brass or steel cages.
298
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Tapered roller thrust bearings
299
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301/423
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Crossed tapered roller bearings
301
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303/423
302
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304/423
Crossed tapered roller bearings
303
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305/423
Non-standard crossed tapered roller bearings
304
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306/423
305
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307/423
Crossed tapered roller bearings (Equivalent designation)
306
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308/423
307
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309/423
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310/423
Spherical thrust roller bearings
309
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311/423
310
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312/423
Spherical thrust roller bearings
311
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313/423
Spherical thrust roller bearings
312
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314/423
Spherical thrust roller bearings
313
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315/423
Spherical thrust roller bearings
314
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316/423
Bearings for various applications
315
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317/423
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318/423
Deep groove ball bearings with
spherical outer ring and extendedinner ring
317
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319/423
318
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320/423
319
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321/423
Deep groove ball bearings with extended inner ring
UC and UCC type
320
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322/423
321
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323/423
Deep groove ball bearings with extended inner ring
UC, USC and UD type
322
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324/423
323
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325/423
324
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325
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327/423
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328/423
Bearings for textile machines
327
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329/423
328
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330/423
329
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331/423
330
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331
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333/423
332
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334/423
333
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334
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335
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336
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337
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340/423
Water pumps bearings
339
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341/423
340
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342/423
341
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343/423
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344/423
Bearings for cardan drives
343
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345/423
344
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345
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346
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347
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349/423
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Slewing bearings
349
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351/423
350
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352/423
351
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353/423
352
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353
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354
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355
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356
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357
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358
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359
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360
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361
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362
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363
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364
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365
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366
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367
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368
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369
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370
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371
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372
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373
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374
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375
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376
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377
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378
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379
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380
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381
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382
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383
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384
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385
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386
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387
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388
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390
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391
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Bearing housing units
393
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401
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402
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403
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404
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405
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Accessories
407
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408
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409
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410
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411
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415
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416
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417
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Rolling elements
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420
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421
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