Archive for August, 2010

Bearings Incorporated would like to introduce ….

Tuesday, August 31st, 2010

…. Leonard 

 Leonard began working at Bearings Incorporated since 1985 working in the basement offices of our Center Street store; in Milwaukee, Wisconsin.  He was trained as an outside salesman, and moved to Sales Manager.  Some of Leonard’s duties now consist of arranging sales training with our vendors; and working on easing the momentary disruptions that happen throughout the day.  He still works as one of our hard working outside salesmen, but helps with the telephone and counter help when he is in the office, and also holds the ranking of Corporate Vice President.  He enjoys learning and discovering new vendor lines for us to add to our customer support.

Leonard is married, and has 2 children currently in the armed forces. His daughter in the Air Force Reserves, and his son took after his father in joining the Marines. He is passionate about reading.

He is excited about the new launching of our website; Bearings Incorporated, and is looking forward to having “another 24/7 sales force”.  He is instrumental in the behind the scenes processes of creating our new website, expected to launch in September 2010.

Bearings Incorporated has an extensive Library

Thursday, August 26th, 2010

Our library at Bearings Incorporated is extensive, and we have records from back to the 1920’s.  We have a wide variety of vendors, products, and ages of catalogues.

Even with the many vendor changes throughout the years.  Timken has now bought Fafnir, Torrington, and National Oil Seals.   SKF has purchased Chicago Rawhide seals, and MRC bearings.  SNR Bearings is now NTN.  We are current with the catalogues of today, we also have the accessibility to  refer to the old references as well.  

If you have a Victor seal in your equipment, even though they are no longer in business; don’t despair; we still have the interchange catalogues and may be able to find a suitable replacement.  Our cataloges refer back into the 1920’s, and we have shelves of historical reference catalogues.

Bearings Incorporated – May we introduce …..

Tuesday, August 24th, 2010

… Jim, the President of Bearings Incorporated…

Jim (Jim S) grew up in the business of Bearings Incorporated.  Jim started in 1964, shortly after the Center Street location opened it’s doors in 1960,  on weekends and after school, scrubbing floors, and general cleaning of the warehouse. 

He became full time in 1969.  He did outside and inside sales through this time period. 

 He is happily married, and has 1 daughter.  Jim is soon to become a grandfather, and definitely enjoys his golf game.

When Bearings Incorporated opened up a secondary branch in 1978, his brother John ran this office, and when John transferred back to Milwaukee; Jim moved to the Bearings Incorporated in  Menomonee Falls; Wisconsin.  He ran this location until we moved to Germantown Wisconsin; in 1992.  At this time we closed the office in Menomonee Falls, as this new building was the new location.  It has more customer parking, and better customer access.

In 1994 he stepped into the presidential postion in Bearings Incorporated.  He still helps customers with  counter sales, and phone sales. 

Jim is excited about our next step into the age of the Internet.  Our website, is projected to be launched in September 2010, will be more customer friendly; and will create more customer interactiveness.

Construction of Optibelt V-Belts

Thursday, August 19th, 2010

Base Rubber     

The base rubber for Optibelt V-Belts is extruded in long lengths from a specially prepared rubber mixture.  This extrusion has a very high cross-sectional accuracy and also creates uniformity of belt weight per unit  length.  Uniformity of density throughout a V-Belt is of prime importance for vibration free running.     

 Tension Cord     

The tension cord for Optibelt V-Belts is manufactured from polyester fiber spun into various thread configurations. The physical properties of a tension cord are matched to the nature of the belt application and are dependant upon the configuration into which the cord is spun. To ensure that the tension cord has good adhesion within the V-Belt, it is specially impregnated so that it is fully compatible with rubber, and then sprayed. A completely homogeneous bond with the base and filler rubber is therefore guaranteed.     

 External Cover Fabric     

The cover consists mainly of a cotton fabric which has a highly twisted, shear resistant, warp and weft fibers.  Broad widths of the fabric are treated on both sides with a neoprene natural rubber mixture, and then cut into diagonal strips; the width being determined by the section of the V-Belt to be covered.  


Optibelt V-Belts are manufactured on highly automated machines.  Every V-Belt is constructed individually.  A measured length of tension cord having an exact number of turns is guided over two rolls, together with the filler rubber.  The accurately extruded base rubber.  The pre-prepared strip of cover fabric is finally wrapped around the V-Belt.  The semi-finished V-Belt is now ready for vulcanization.  

The ORV Vulcanization Process

The ORV (Optibelt Rotary-Vulcanization) process, which was developed by them, differs quite considerably from the traditional methods of vulcanization.  In the ORV process, V-Belts are vulcanized in heated V-Grooves while rotation takes place, hence in the same mode of motion and shape in which they will subsequently give service. 

With the traditional methods of vulcanization it is very difficult to exercise any control over the retention of the nominal lengths of the belts, whereas by means of their electronically controlled cord stabilization process, which they have patented in many countries, the nominal length tolerances of V-Belts vulcanized by the ORV process are restricted to a minimum. 

A “Panzerband”, which revolves around guide rollers and is tensioned by means of a hydraulically operated tension drum, presses the V-Belts into the V-grooves of the heated vulcanizing drum.  The V-Belt flanks and the sides of the pulley grooves, without significant distortion.

Cord Stabilization

Electronically controlled cord stabilization during manufacture gives Optibelt V-Belts their unique SetConstant feature.

Optibelt SetConstant V-Belts of similar nominal length can be assembled into matched sets at random without further measurement.  Length stability is guaranteed over many years, even under adverse storage conditions.

Bearings Incorporated is proud to state that we have been a faithful distributor of Optibelt quality belts for many years now.

Design and Characteristics of Ball and Roller Bearings

Tuesday, August 17th, 2010
NTN Catalogue – Part 2 of 2

Continued from Part 1 of August 12, 2010

DOUBLE ROW SELF-ALIGNING BALL BEARINGS utilize an inner ring with two rows of balls, in two deep raceways; and an outer ring with a single spherical raceway.  In this way, the inner and outer rings can be misaligned relative to each other.  The resulting affect is a comparatively large angle imposing moment loads upon the balls. 

The boundary dimensions of the 1200 and 1300 series are the same as the 6200 and 6300 single row deep groove bearings.

CYLNDRICAL ROLLER BEARINGS have rollers which are essentially cylindrical in shape.  This provides a modified line contact with the cylindrical inner and outer ring raceways, while the rollers are guided by ground ribs on either the inner or outer ring.  The cylindrical shape allows the inner ring to have axial movement relative to the outer ring (except the NH type).  This is especially important when accommodating thermal expansion when both rings must be press fitted. 

In this series, the NJ, NF, and NH types can carry light or intermittent thrust loads.  The bearings utilizing machined bronze cages are suitable for high speed operation.

The NN3000 and NN3000K series are available in high precision tolerances and are well suited for use in machine tool spindles.

TAPERED ROLLER BEARINGS utilize conical rollers and raceways arranged so that the rollers and raceways meet at a common apex.    The rollers are guided by contact between the large end of the roller and a rib on the inner ring.  This provides high capacity for radial and single thrust loads.

SPHERICAL ROLLER BEARINGS have two rows of rollers in separate raceways which allows the bearing to compensate for angular errors.  They have large radial and thrust load capacity for heavy shock and impact loads, suitable for heavy industrial equipment.

DUPLEX BEARINGS use a set of two on a common shaft with the inner and outer rings clamped solidly together.  They are used to gain axial shaft control, rigity and extra capacity.

There are three fundamental combinations n duplex bearings: face to face (DF); back to back (DB); and tandem (DT).

The back to back mounting (DB) has the load lines through the balls converging toward the outside of the bearing.  This arrangement is preferred when the pair of bearings is to resist moment loading.

The face to face mounting (DF) has the load lines through the balls converging  towards the axis of the bearing.  This arrangement is less sensitive to slight angular errors in mounting of the bearings.

The tandem mounting (DT) is arranged so that the load lines through the balls are parallel to each other.  This mounting is used when it is desired to divide a heavy thrust load between the two bearings.  Since this mounting carries thrust load in one direction only, a third bearing should be provided to take thrust load in the reverse direction.

SINGLE DIRECTION THRUST BALL BEARINGS consist of two washers having ball grooves ground into their adjacent faces with balls and cages mounted between these grooves.  They are normally equipped with either pressed or machined cages and are suitable for carrying thrust loads at moderate speeds.

DOUBLE DIRECTION ANGULAR CONTACT THRUST BALL BEARINGS are back to back duplex bearings with a larger contact angle than that of normal angular contact ball bearings. 

These bearings have been recently developed, and are primarily designed as thrust bearings for machine tools.  They utilize machined brass cages. 

SPHERICAL ROLLER THRUST BEARINGS are similar to double row spherical roller bearings, but have a greater contact angle.  They are guided by ground flanges on the inner ring and operate against the spherical raceway in the outer ring.  The contact angle is approximately 45⁰.  Machined cages are normally used and oil lubrication is recommended.

Design and Characteristics of Ball and Roller Bearings

Thursday, August 12th, 2010
NTN Catalogue – Part 1 of 2

SINGLE ROW DEEP GROOVE RADIAL BALL BEARINGS  are the most widely used bearings and utilize an uninterrupted raceway, which makes these bearings suitable for radial loads, or a combination of radial and thrust loads.  This design permits precision tolerances even sat high speed operation. 

The cage in this bearing is pressed steel.  For high speed bearings, machined brass cages are available.  Bearings with locating snap rings are also available.

PRELUBRICATED BEARINGS have integral seal, or shields, which are packed with long-life grease.  In many applications, these bearings may be used without supplementary seals, closures, or protective devices.  This design offers the lowest possible manufacturing cost to the consumer. 

The boundary dimension of this type is the same as the corresponding bearings without the seals or shields.

SHIELDED BALL BEARINGS incorporate securely fastened, steel reinforced, rubber seals, fastened to a groove on the outer ring.  Contact with the inner ring is by sealing lip (Contact suffix LLU). Or, non-contact with the inner ring is by labyrinth seal (non-contact suffix LLB) to provide positive sealing at all times.

SINGLE ROW ANGULAR CONTACT BALL BEARINGS  feature raceways with high and low shoulders.  These opposing raceways are designed to carry thrust load in one direction. 

These bearings may be preloaded at the factory so that the correct preload will develop within the bearing.

The bearings in this series are assembled with a specific internal clearance so that they will have a specified contact angle under stress load.  The standard contact load used by NTN is 30⁰; bearings made to 40⁰contact angle carry the suffix B.

For high speed grinding spindles the 7000C, 7200C and the 7300C series are available.  They are high accuracy bearings with a 15⁰ contact angle, and phenolic resin cages for high speed operations.

DOUBLE ROW ANGULAR CONTACT BALL BEARINGS have an inner and outer ring with a double raceway.  The two rows are so related that the contact angle is similar to a pair of back-to-back single row bearings.  The 5200 and 5300 series offer continuous races, and can carry thrust loads in either direction.  Since the 3200 and 3300 series have filling slots, it is necessary to mount them with the thrust load acting against the un-notched face of the rings.

To be continued August 17, with Double row self-aligning ball bearings, Cylindrical roller bearings, Tapered roller bearings, Duplex bearing, Single direction thrust ball bearing, and double direction angular contact bearings.

See Part 2

I tried and tried, and now need to switch tracks

Tuesday, August 10th, 2010

Catch a man a fish, and you can sell it to him. Teach a man to fish, and you ruin a wonderful business opportunity.

I worked throughout the day trying to get, what I thought, was a great blog done for today, only to be fought tooth and nail.  So now we need to go a different track and save my marvelous blog for another day.

The above quote by Karl Marx explains it well.  Bearings Incorporated has gone from a simple blacksmith shop, to the 100 plus year old corporation it is today.  Someone taught the proprietors to fish.  As changes came about, they adapted to them, and we are still adapting to changes today.  We represent multiple product lines, as well as multiple well established manufacturers

Bearings Incorporated  has established themselves over the years, as reliable, trustworthy, and service oriented.  We are now taking the next step in “learning to fish” .  We’re excited about our new website, in the process of being built, and we are hoping it will be launched in September 2010.  Of course as the new comes to life, the links  will all change, but the service, and the dedication towards our customer will never change.

We have “learned how to fish” and continue to prosper in today’s shaky economy.  Not only have we learned to fish, we have also learned to clean, bread and pan fry.