Archive for July, 2011

Timken Extra-Precision Bearings Part 1 of 4

Wednesday, July 27th, 2011

ABEC-3, ABEC-7, ABEC-9

INTRODUCTION

Every ball bearing manufactured by The Fafnir Bearing Company is made to close tolerances. The standard tolerances established by the Annular Bearing Engi­neers Committee (ABEC) are adhered to in even the most liberal classification (ABEC-1) thus assuring a product of precision nature. Many applications are suc­cessful with ABEC-1 tolerance bearings. However, for applications involving either very high speed, extreme accuracy or rigidity, or combinations of these character­istics, The Fafnir Bearing Company manufactures a complete line of extra-precision ball bearings to ABEC-3 (M type) and to ABEC-7 (MM type) tolerances’.’ These bearings are used in equipment such as high grade machine tools, woodworking machinery, gas turbines, jet engines and sensitive precision instruments.

These ball bearings are usually the single row type and are manufactured to much closer tolerances than those of the regular ABEC-1 single row ball bearings having the same boundary dimensions.

All classes of extra-precision bearings are available in the extra light, light and medium series.

DEFINITIONS

In The Fafnir Bearing Company numbering system, the basic number denoting size and series is always retained. When special variations are made, as in the case of extra-precision bearings, prefixes and suffixes are added which have definite meanings.

Prefixes

 

M—Special Precision – ABEC 3 Tolerances

2M—Special Precision – ABEC 3 – 12o Contact Angle (WI Only)

3M – Special Precision – ABEC 3 – 25o Contact Angle (WI Only)

MM – Super Precision – ABEC 7 Tolerances

2MM – Super Precision – ABEC 7 – 12o Contact Angle (WI Only)

3MM – Super Precision – ABEC 7 – 25o Contact Angle (WI Only)

2MMF – Super Precision – ABEC 7 – 12o Contact Angle – Flanged type (WI only)

3MMF – Super Precision – ABEC 7 – 25o Contact Angle – Flanged type (WI Only)

 

 

Suffixes

K — Non-Filling Slot Type

WI — Maximum Capacity Counterbore Type

WO — Extreme High Speed Type

CR — Composition (nonmetallic), Ring Piloted Retainer

MBR — Machined Bronze Ring Piloted Retainer SMBR — Machined Iron Silicon Bronze Ring Piloted Retainer

SR — Pressed Steel, Ball Piloted Retainer

DUL — Flush Ground Duplex Bearings — Light Preload

DUM — Flush Ground Duplex Bearings — Medium Preload

DUH — Flush Ground Duplex Bearings — Heavy Preload

SUL — Flush Ground Single Bearing — Light Pre­load

SUNI — Flush Ground Single Bearing — Medium Preload

SUH — Flush Ground Single Bearing— Heavy Preload

FS130 — Ultra-Precision — ABEC-9 Tolerances

FS223 — Zero Preload

TOLERANCE GRADES

Special-Precision ABEC-3 (M)

Special-precision ball bearings are widely used on most types of machinery such as woodworking ma­chines, machine tools, aircraft accessories, and pre­cision gear-boxes where accuracy, high-speed opera­tion and rigidity not provided by ABEC-1 ball bearings are required. These bearings should not be used as a low cost substitute for extra-precision ABEC-7 bearings.

Super-Precision ABEC-7 (MM)

Super-precision bearings are generally used in applications such as machine tool and woodworking spindles, gas turbines, jet engines, drive gearboxes, speed increasers, and high precision instruments. These bearings are applied wherever high precision, high-speed capability and/or a high degree of rigidity control is desired.

Ultra-Precision ABEC-9 (FS-130)

Ultra-precision bearings are manufactured to closer tolerances than ABEC-7. They are used on devices such as high precision machine tool spindles, computer memory drums, rate tables, extremely accurate track­ing equipment and ultra-precision instruments.

We seem to be getting over abundance of spammers

Monday, July 25th, 2011

Please make note ..

I want to thank those of you that are legitamately interested in our postings, and have created a login for our blog, however, we seem to be getting an over abundance of spamming within our blog lately.  This is a waste of time on their behalf, due to the fact that ALL comments are moderated, and therefore the blog will never see their postings.

I have also been going through the current user list, and “cleaning it up”.  IF accidentally your login has been deleted in error, I want to apologize for that.  A new procedure has been put in place, that each new login is checked for spamming records, and if there are records indicating spam; the account is immediatly deleted.  This will detour any future spammers to even wasting their time … since whatever they are trying to sell will never be seen by anyone anyway ..

Why I have to bother wasting my time with a posting like this is beyond me with the exception of those that are LEGITAMATE viewers of our blog (and I thank you for your patronage!!!!)

Wishing all a wonderful day ….

Timken Bearings- Quality and Performance Come Standard

Friday, July 22nd, 2011

The Timken name stands for high quality and outstanding performance.  Using their capabilities in bearing technology, manufacturing, engineering support and distribution, they provide their customers with smart, cost-effective friction management and power transmission solutions that help outperform the competition.

Expanded Housed Unit Offering

From the manufacturer that brought you reliable Fafnir® ball bearing housed units and Timken® SAF® pillow blocks comes a growing line of roller housed units. We’ve expanded our offering to include Timken® Type E housed units featuring our own advanced tapered roller bearings and seals.

The latest innovation is their  new series of Timken®

Type E roller housed units. Timken engineers have applied more than 110 years of expertise in bearing design — and leadership in tapered roller bearings — to bring you an optimized performance tapered roller bearing housed unit. They have improved thier own design to create the new standard in performance.

The Timken brand stands for outstanding quality in everything they do, from product design and manufacturing to engineering support and distribution.

Timken’s commitment to quality, service and delivery adds up to an unbeatable value for customers everywhere.

Quality Solutions

As the only premium bearing manufacturer to also make super-clean, high-alloy bearing steel, Timken knows how critical quality materials are to product performance.

They have also implement the Timken Quality Management System in every plant worldwide, so each bearing product meets the same high performance standards — no matter where in the world it is manufactured.

Dependable Service

Their roller housed units are backed with the service of Timken’s industry-leading experts who are ready to assist you with product design, application knowledge and 24/7 field engineering support — anything you need to help improve uptime and maximize equipment performance.

On Time Delivery

Timken Bearings know short lead times are critical to keeping your operations up and running. Many of their Type E roller housed units are in stock for immediate shipping. For special orders, They work quickly to manufacture and deliver your products on time.

 

One year ago ….

Wednesday, July 20th, 2011

 

 

 

 

…We entered our first blog … We recieved our first follower … We started a new step in our business life. 

Bearings Incorporated wants to thank those that have followed this past year … My next year goal is looking for more TRUE interaction. 

Any suggestions as to what anyone would like to see within the bearing world; I am interested in ..

Here’s to another year of success with Bearings Incorporated

We are keeping on sale …

Wednesday, July 13th, 2011

Timken 204RR6 Lawn mower deck bearings

 .. Still can be bought for $10.00 each (plus shipping and handling)

and

NSK 6205DDUC3 Electric Motor Quality Bearing

…. Still can be purchased for $6.12 each .. (plus shipping and handling)

 

Check them out NOW  .. they have been extended until July 31st, 2011 ..

Timken Primary Processes / Thermal Treatment Processes

Wednesday, July 6th, 2011

PRIMARY PROCESSES

HOT ROLLING

Hot rolled tubing has a surface finish comparable to hot rolled bars, plates or sheets of equal thickness. Light mill oxide covers both the outside and inside surfaces. Hot rolled tubing can be produced to outside diameter and wall dimensions with stated tolerances.

When a quotation for this highly specialized product is requested, we work closely with the customer to gain as much knowledge as possible about the end use. This enables us to apply materials with optimum dimensions to reduce costs.

COLD DRAWING

Cold drawn tubing is produced from hot rolled tubes that have been carefully inspected and properly surface-conditioned. Cold drawing consists of pulling a tube through a die and over a mandrel, reducing the diameter and wall thickness. Tubing is cold drawn for one or more of the following reasons: closer dimensional accuracy, better surface finish, smaller sizes than can be hot rolled, or to achieve certain mechanical properties. Cold working also imparts higher strength to the tubing and tends to improve machinability of carbon and lean-alloy steel.

ROTOROLLING®(Cold Pilgered)

Rotorolled tubing is produced from hot rolled tube shells that are conditioned for further reducing. Rotorolled tubes are produced on a machine designed to make large reductions of the cross-sectional area in one pass of the tube. The machine operates by cold swaging the tube between semicircular dies containing tapering grooves. The dies rock back and forth while the tube is advanced and rotated between rocking cycles over a long tapering mandrel. The developed contour of the die grooves forms a tapering circular pass that ends in a constant-diameter ironing section that establishes the OD of the finished tube.

Rotorolled tubing is a premium product with a surface condition superior to those obtained by cold drawing. Machinability is excellent. Dimensional tolerances are very uniform. Our ability to obtain large reduction ratios allows superior mechanical properties to be achieved.

Wall thickness of up to one-third of the outside diameter can be produced.

  

ROUGH TURNING                           

 Turned tubing is produced by machining the outside surface of the hot rolled tubing. This process removes surface defects and decarburization from the outside, but the inside diameter surface retains the hot rolled finish. This is accomplished in a machine where the tools are mounted in a ring and rotated around the tube. The only motion of the tube is lateral, through the ring and past the rotating tools. Turned tubing is used extensively in automatic screw machines for manufacture into ball and roller bearing races and for special applications where advantages can be taken of the close outside tolerance or clean outside surface. Any hot rolled size up to 8 inches OD can be rough turned. Surface finish approaches 125 RMS or better.

 

THERMAL TREATMENT PROCESSES

 ANNEALING

Annealing is heating uniformly to a temperature within or above the critical range and cooling at a controlled rate to a temperature under the critical range. This treatment is used to produce a definite microstructure, usually one designed for best machinability. It is also used to remove stresses; induce softness; and alter ductility, toughness or other mechanical properties.

HOT BED COOLING

This is the standard process of air cooling the tubing immediately following piercing on a special table or hot bed that continuously advances the tubing as additional tubes are finished. Tubing that is hot bed cooled may require additional thermal treatment to obtain optimum machinability or required mechanical properties.

MILL ANNEALING

Mill annealing is a controlled cooling of the tubing immediately following piercing which produces – in some low and medium carbon alloy grades – the optimum hardness and microstructure for machinability.

NORMALIZING

In this process, steel is heated uniformly to a temperature at least 99° F (37° C) above the critical range and cooling in air to room temperature. This treatment produces a recrystallization and refinement of the grain structure and gives the product uniformity in hardness and structure.

PROCESS TEMPERING

Process tempering is performed to improve subsequent fabrication of the material (machining, cold working, etc.). See Tempering.

QUENCHING (QUENCH HARDENING)

This processes heats steel uniformly to a temperature above the critical range and cools it rapidly in a liquid medium.

SPHEROIDIZE ANNEALING

This special type of annealing requires an extremely long cycle. Spheroidize annealing is used to produce a globular condition of the carbide and maximum softness for best machinability in some analyses or to maximize cold formability.

STRESS FREE

This designates tubing that has been hot rotary straightened. Minimal straightening stresses develop in hot rotary straightening, so stress relief tempering is not needed. Cold rotary straightening and stress relieving can substitute for hot rotary straightening.

STRESS RELIEVING

Stress relieving is a final thermal treatment used when stress-free material is desired. Its purpose is to restore elastic properties and minimize distortion on subsequent machining or hardening operations. This treatment is usually applied on material that has been heat treated (quenched and tempered). Normal practice is to heat to a temperature 99° F (37° C) lower than the tempering temperature used to establish mechanical properties and hardness.

TEMPERING

Tempering heats uniformly to a temperature under the critical range, holding at that temperature for a designated period of time and cooling in air. This treatment is used to produce one or more of the following end results:

  • To soften material for later machining or cold working. Also referred to as a Process Temper.
  • To improve ductility and relieve stresses resulting from prior treatment or cold working.
  • To produce the desired mechanical properties or structure in the second step of a double

Happy 4th of July !!!!!

Monday, July 4th, 2011

  

WE WANT TO WISH YOU ALL A WONDERFUL,

AND SAFE HOLIDAY WEEKEND.

 

 

 

REMEMBER TO THANK A SERVICE MAN/WOMAN FOR THEIR SACRAFICES FOR OUR FREEDOM !