Description   Roller bearings are used to replace sliding movement with low friction, rolling motion in rotary applications.  The principal types of roller bearings are cylindrical, spherical, and tapered. In general, roller bearings offer higher load capacities than ball bearings of the same size.   Types   There are five main types of roller bearings:   Cylindrical Roller Bearings have high radial-load capacity and moderate thrust loads. They contain...
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Q & A on Roller Bearings

We asked our users for their input on Roller Bearings. Here are the results of 64 users familiar with Roller Bearings.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing roller bearing design?
7 answers
Answers:
Extended Life bearings which increase service life between overhauls, Lubricated for Life bearings which require lesser periodic maintenance.
~SREENIVASAN A, Purchaser, SIVASAGAR, ASSAM, INDIA
Spherical roller design, material and heat treatment
~Femi K, Engineer, Lagos, Nigeria
Materials available, lubrication, range of sizes
~Other, Canberra, Australia
Ceramic bearings, solid lube bearings etc.
~R Dewaker Koti, Technical Support, Chennai, India
Wearabilty, longevity, maintenance
~Steve B, Parts associate, Green Bay`, WI
The advent of new materials
~Russell S, Technical Support, Asheville, NC
Better steel and coatings.
~Peter V., European sales manager, Lebbeke, Belgium

Q:
From your perspective, which companies are creating the most innovative roller bearings?
9 answers
Answers:
INA, SKF, Japanese manufactures have a good range
~Other, Canberra, Australia
Timken, SKF, NSK, Schaeffler, Revolvo.
~Peter V., European sales manager, Lebbeke, Belgium
SKF, Timken-Torrinton & ARB
~SREENIVASAN A, Purchaser, SIVASAGAR, ASSAM, INDIA
INA, FAG, SKF, Rothiaden
~R Dewaker Koti, Technical Support, Chennai, India
Automobile industries
~Aniket K, Engineer, Pune, India
Timkin and NTN
~Steve B, Parts associate, Green Bay`, WI
Not a clue
~Russell S, Technical Support, Asheville, NC
SNR
~Femi K, Engineer, Lagos, Nigeria
Skf
~Engineering, Design, Smederevska Palanka, Yugoslavia

Applications and UseTop

Q:
What are some of the applications you have used roller bearings for?
19 answers
Answers:
We use bearings in all our Oil Field Equipment like, Draw Works, Mud (Slush) Pumps, Rotary Table, Hooks, Crown Block, Traveling Block, Swivel and other equipments during their capital overhaul.
~SREENIVASAN A, Purchaser, SIVASAGAR, ASSAM, INDIA
Trunnions for asphalt drum dryer, exhaust fan for asphalt baghouse, counter weights for aggregate shaker screen deck and aggregate conveyor systems.
~Engineering, Other, Charlotte, NC
Automotive - hub units, transmissions brgs Aerospace - gas turbine main engine brgs Industrial - all rotating applications
~Engineering, Design, Lichfield, Great Britain
1) Boiler blower 2) Cylindrical dryer in paper or chemical industries 3) Motor stater 4) automobile industries
~Aniket K, Engineer, Pune, India
Currently working for a Drilling contractor overseas, and we need them for repairs and for spare parts as well.
~Purchasing, Poite Noire, Congo
On conveyor pulley Plumber blocks, Gearboxes, compressors, Pump Bearing assemblies, Cars etc.
~Maintenance/Facilities Management, BAMAKO, Mali
Steel mills, paper mills, wind mills, pumps, fans, gearboxes, electrical motors, ...
~Peter V., European sales manager, Lebbeke, Belgium
Motorcycle main and crank bearings, fan shafts, rolling mills etc
~Other, Canberra, Australia
I use this bearing with hot abrasive cut off machine
~Maintenance/Facilities Management, Karachi, Pakistan
Plunger Pump Bearings Jack-shaft bearings
~Engineering, Consulting, Weatherford, TX
Wheels, levers, drive units, ect.
~Russell S, Technical Support, Asheville, NC
Wheel bearings for semi trucks
~Steve B, Parts associate, Green Bay`, WI
Cars and motorcycles
~Marketing/Sales, Lincoln, RI
Roll-forming machine
~Engineering, Design, Smederevska Palanka, Yugoslavia
Gear boxes, Sheaves
~Maintenance/Facilities Management, Gandhidham, India
Motorbike, bike
~Engineering, Other, Athens, Greece
E-motors, pumps
~Maintenance/Facilities Management, Tiel, Netherlands
Profession
~R Dewaker Koti, Technical Support, Chennai, India
Gear box
~Femi K, Engineer, Lagos, Nigeria

Q:
Please share with us any “non-standard” applications that roller bearings have been used for.
5 answers
Answers:
Wheel bearings for a decorative cannon for the parade.
~Steve B, Parts associate, Green Bay`, WI
Final drives used in tracked machines.
~Russell S, Technical Support, Asheville, NC
Can't think of any now.
~Femi K, Engineer, Lagos, Nigeria
Cryogenic pumps
~Peter V., European sales manager, Lebbeke, Belgium
Cold forging
~Engineering, Design, Smederevska Palanka, Yugoslavia

Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of roller bearings?
6 answers
Answers:
Mainly rough handling of precision bearings and improper lubrication in tough & challenging applications like Oil Field Equipment.
~SREENIVASAN A, Purchaser, SIVASAGAR, ASSAM, INDIA
Leaving them loose and the jamb nut backs off. Wrecks the spindle and the wheel could come off or burn up the hub and spindle.
~Steve B, Parts associate, Green Bay`, WI
Incorrect use and poor maintenance are still a very big problem in the overall industry, and leads to premature failing.
~Peter V., European sales manager, Lebbeke, Belgium
A whole plant shut down, so many motors burning in our homes, ceiling fans burning.... so many others too.
~R Dewaker Koti, Technical Support, Chennai, India
Yes, someone in the shop "grenaded" a planetary unit by the use of incorrect/inferior roller bearings.
~Russell S, Technical Support, Asheville, NC
Yes: still have not figured it out.
~Other, Canberra, Australia

FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
6 answers
Answers:
If Bearings are designed for long Intervals between periodic lubrication intervals, it will be very useful as this will reduce dependence on manual monitor of proper lubrication.
~SREENIVASAN A, Purchaser, SIVASAGAR, ASSAM, INDIA
Greater choice in sizes particularly widths outer races available as well as inners
~Other, Canberra, Australia
Sealed, higher strength, Resistance to pitting or flaking
~Steve B, Parts associate, Green Bay`, WI
Develop of such kind of repairable bearing
~Aniket K, Engineer, Pune, India
Incorporation of lip seal in the NU type.
~Femi K, Engineer, Lagos, Nigeria
To replace what I took off
~Russell S, Technical Support, Asheville, NC

Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of roller bearings?
6 answers
Answers:
Select only optimum size of bearings and avoid as far as possible using overrated bearings for lesser operational requirement.
~SREENIVASAN A, Purchaser, SIVASAGAR, ASSAM, INDIA
Speak to as many people as you can prior to selection. Fits and clean environment of course.
~Other, Canberra, Australia
Talk to the right people (not only the major players).
~Peter V., European sales manager, Lebbeke, Belgium
Advise mechanics to handle bearings gently.
~R Dewaker Koti, Technical Support, Chennai, India
Do not overtorque
~Steve B, Parts associate, Green Bay`, WI
Not really
~Russell S, Technical Support, Asheville, NC

Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using roller bearings?
6 answers
Answers:
We should try to minimize unscheduled replacement of bearings by maintaining them to derive maximum service for which they are designed for. This will have an environmental impact and save precious material used in the manufacture of bearings. Always discard the used bearings after cutting them into pieces. This will avoid spurious bearings coming into the market. Always explore if life of used bearings can be extended as solutions are being offered in this direction by reputed manufacturers like ARB.
~SREENIVASAN A, Purchaser, SIVASAGAR, ASSAM, INDIA
Be open-minded and deal for special applications with specialized companies (some types of bearings are more interesting if you buy them from smaller players).
~Peter V., European sales manager, Lebbeke, Belgium
First define the load on bearing then select the proper bearing & use standard bearing or non standard.
~Aniket K, Engineer, Pune, India
Always use genuine bearings from genuine or authorized sources, even if they are priced high.
~R Dewaker Koti, Technical Support, Chennai, India
Support knowlegeable locals with a quality product.
~Other, Canberra, Australia
Research
~Steve B, Parts associate, Green Bay`, WI


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