Another good video
COUNTERFIT BEARINGS
This is thought provoking .. and can cause a crisis. Make sure that you are using suppliers with a positive reputation. Bearings Incorporated is a direct supplier of the big names like Timken, Torrington, MBL belts, Optibelt, and all of our suppliers have offices within the borders of United States of America.
Please it could save your life … KNOW where your bearings are coming from ..
Topics: Bearings, Informational, News | No Comments »
How Bearings Are made
BEARINGS, HOW THEY ARE MADE
I saw this video this morning and thought it would a good way to start the new year of 2012. It was interesting to watch, and very informative.
Hope you enjoy it.
Topics: Bearings, Informational, Needle Roller bearings, Radial Ball Bearing, Tapered Roller Bearings, Thrust bearings, Uncategorized, Wide Inner Ring Bearings | No Comments »
Rhino Cleaning Supplies WHILE SUPPLIES LAST !
Check out the ON SALE section of the website, Bearings Incorporated for Rhino Products.
Formulated from water soluble synthetic surfactants. No hazardous chemicals. Will not harm humans, animals, plant life, soil, lake water, or sewer. Safe on all surfaces.
All surfaces consist of carpet, upholstery and clothing. Leaves no residue.
The Rhino blue cleaner/de-greaser is safe on pain, wax gaskets and seals, and works on all surfaces including garage floors, patios, driveways, wooden decks, lawn furniture, golf clubs, siding, appliances, auto exterior and interiors, engine and parts, canvas, carpet, fabric and vinyl, all floors and walls and RV’s with a cost of $3.25
Rhino attacks grease, oil, grime, bug, pet and human stains, blood, food and drink stains, mildew, water stains, smoke and soot.
For heavy duty supply check out the Gallon Size All Purpose Cleaner for $9.50; good for grease, oil, grime, bugs, pet and human stains, blood, food and drink stains, mildew, water stains, and smoke and soot. Safe for use on all surfaces … carpet, upholstery, and clothing leaving no residue behind.
Check out the other Rhino products
Bearings Incorporated wants to wish everyone a Safe and
Happy Holiday season.
Topics: Informational, News, Sales | No Comments »
Tags: industrial news, information, sales
Peer Large Bore Bearings, now available….
On our website, Bearings Incorporated; specifically within the Peer Bearing Category check out the Large Bore Series. This is new to Peer Bearing, and they are as excited about it as we are . These prices are in effect until December 31, 2011. Check them out!! Electric Motor Quality, containing Mobile Polyrex EM Grease; they come in Open (C3), ZZD-C3 and 2RLD-C3.
Also check out our new Facebook connection and LIKE our page at Bearings Incorporated at Facebook!
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Tags: industrial news, information, large bore radial, Peer Bearing, radial bearing
As of November 2011 .. we are connecting to FaceBook ..
I’m still in the process of working on it .. and will post the link once I get it to the point of linking direct .. that way you could visit us on our Facebook Page as well …
Topics: Bearings, Informational, News | No Comments »
Tags: industrial news, information
Bearings Incorporated is hosting the KTV again …
Koyo will be stopping by with it’s KTV on September 28th from 9:00 am to 1:00 pm, and open to Bearings Incorporated past, present and future customers.
Koyo brochure 2011
Here is the printable brochure, and we hope to see you there!!
Topics: Bearings, Informational, Needle Roller bearings, News, Radial Ball Bearing, Thrust bearings, Wide Inner Ring Bearings | No Comments »
Tags: ball bearing, industrial news, information, Koyo, radial bearing
The Baldor-Reliance Super-E
In the mid-1970s, a southeastern tire manufacturing plant asked Baldor if it were possible to increase the operating efficiencies of motors in their plants. Baldor engineers determined that considerable energy savings could be gained from a better motor design. By adding more copper to the windings, upgrading the laminations to a higher premium-grade steel, designing precision air gaps between the rotor and stator, and reducing fan losses in the motor, Baldor was able to supply the plant with the premium efficient motors it needed.
This was the birth of the Baldor Super-E®. Today’s upgraded and expanded Super-E product line offers some of the highest levels of efficiency in more than 600 stock motors rated from 1/2 to 15,000 horsepower. Super-E, severe duty, close-coupled pump, IEEE 841, washdown, and explosion-proof models are also available with a three-year warranty or better. (Our IEEE 841 motors have a five-year warranty.) Called a “key breakthrough” by the Consortium of Energy Efficiency, the Baldor Super-E was recognized by the CEE in 1998 as the first premium efficiency motor line to meet their stringent efficiency criteria citing, “For the first time, one manufacturer will carry all qualifying products.” In 2001, the CEE efficiency levels were adopted as the NEMA Premium® efficient levels and expanded to 500 horsepower.
To understand what a motor really costs, compare initial purchase price with the cost of theelectricity it uses over its working lifetime. Often, too much attention is paid to purchase price. For most motors, this initial cost represents less than two percent of its lifetime cost. Electricity accounts for about 97 percent. Baldor Electric Company’s motors and drives save customers money every minute they operate. Whether it’s lower energy costs or greater reliability, these savings go straight to the bottom line. Baldor is the industry leader in overall efficiency ratings. Better than 96 percent of the energy used by some of Baldor’s Super-E motors is converted to mechanical work. The Baldo•Reliance Super-E runs cooler and longer with greater reliability than any other industrial motor. When you consider that a typical 50 horsepower motor costs over $36,000 to operate continuously in a year, it’s easy to see how just a few percentage points of higher efficiency can quickly reduce electricity costs. Even seemingly modest percentage point differences in efficiency ratings can yield substantial electricity cost savings when the motor is operating continuously every day.
Topics: Informational, Motors | No Comments »
Tags: Baldor, Electric Motors, industrial news, industry advances, information
Baldor Electric Company — First in Energy since 1920
The history of energy efficiency in industrial motors is really the story of Baldor Electric Company. For almost 100 years, Baldor has led the industry in developing products that deliver greater performance and reliability while using less electricity. From the company’s founding in the 1920s through today, Baldor has introduced one efficiency enhancing advancement after another. In fact, many of the advancements initiated by Baldor have later been adopted as industry standards.
The issue of energy efficiency for electric motors and drives is becoming increasingly relevant as electricity costs continue to rise. Companies are now competing in an environment of rising energy costs and the uncertainty of available electricity. These dynamics require the kind of forward-thinking industrial motor, drive, and generator supplier that anticipates customer needs and delivers products that save money and improve productivity. That company is Baldor.
Why is Energy Efficiency Important?
Electric motor-driven systems used in industrial processes consume some 679 billion kWh or 63 percent of all electricity used in U.S. industry, according to a Department of Energy report published in 1998. The report goes on to reveal that industrial motor electricity consumption could be reduced by up to 18 percent if companies were to apply “proven efficiency technologies and practices.” Specifically, the DOE recommends motor efficiency upgrades and application improvements. The purpose of this brochure is to show you the energy saving opportunities from using premium efficient motors and drives. The opportunities are real.
In 1992, the Energy Policy Act (EPAct) established minimum efficiency standards for industrial electric motors built after October 1997. Yet, only about 10 percent of all motors in use today comply with the minimum efficiency levels the Act mandates. When you factor in the savings potential of using adjustable speed drives in many applications, it’s easy to see that the environment, along with your profitability, stand to benefit significantly.
Topics: History, Informational, Motors, News | No Comments »
Tags: Baldor, industrial news, industry advances, information, Motors
Timken Extra-Precision Bearings Part 4 of 4
PRELOADING
Description
Preload is defined as the internal load existing in any device before an external working load is applied. The application of preload to ball bearings is utilized to increase the ball bearing unit’s rigidity; to guarantee intimate contact between the rolling elements and the races at all times, thus insuring complete utilization of the actual running accuracies of the bearings; to eliminate the possibility of looseness from all phases of bearing operation; and to obtain the added effects on the bearing’s basic geometry such as a change in contact angle, a change in strain pattern or a reduction of the minute inaccuracies caused by surface irregularities.
Selection
The selection of the type of bearing and the mounting arrangement to be used is a function of the operating conditions and requirements of the assembly. A realistic evaluation of these conditions and requirements must be made in order to establish the design parameters. Often these parameters are contradictory in practice; therefore, the designer must strive for the optimum design through compromise. Design considerations, such as speed range, operating loads, rigidity requirements, accuracy desired, and ambient and operating temperatures, determine which type bearing must be used, which type mounting and lubrication is required and whether or not preload is necessary. These factors also dictatethe magnitude of the preload required and the method of its application.
If the design dictates that preload is required, a proper level must then be chosen. It should be stressed that while preload on bearings increases their rigidity it also reduces their life expectancy and increases their frictional drag. Therefore, the choice of the preload level to be incorporated must be made with care. Too often, however, the basic design parameters are contradictory and a compromise preload must be selected.
The Fafnir Bearing Company offers three standard preload levels for the various bearing types and sizes. These preload levels were established to satisfy most application requirements.
In the determination of limiting operational speeds corresponding to the permissible ball bearing preloads for machine tool spindles, many influencing factors are involved. Among those considered are spindle mass and construction; type of mounting; spindle rigidity; accuracy requirements; spindle loads; service life; type of service, intermittent or continuous; and method of lubrication.
Because of the complexity of this subject, encompassing all of the factors is difficult. Over a period of several years, data from actual field applications has been accumulated and compiled. Extra precision ball bearings of the three basic series are included. In certain applications, such as the high-speed motorized spindles, specially preloaded extra-precision ball bearings are required. These bearings are zero preloaded (designated FS-223). This means that the faces of the inner and outer rings are flush ground under negligible load.
Width Tolerances
The width tolerance for individual inner and outer rings is +.000 to —.005, but to allow for face grinding for various preload levels the total width tolerances for duplex pairs of bearings are as follows:
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NOMINAL BORE MILLIMETERS WIDTH TOLERANCE |
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over inclusive maximum minimum |
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If additional bearings are involved, the total width tolerance is in proportion to the number of bearings.
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Tags: ball bearing, information, precision bearings, Timken
Timken Extra-Precision Bearings Part 3 of 4
SHAFT AND HOUSING DESIGN
Shafts
Shafts are generally made from steel, hardened and ground all over. During the design of a spindle or shaft it is highly desirable to plan the design so that the shafts can be ground all over from one setting as a final operation to assure true balance and running accuracy. This is a basic requirement for extreme accuracy or highspeed operation.
Housings
Housings are generally made of cast iron and usually are seasoned to lessen possible distortions. The bore of the housing should be ground or precision bored and checked at a number of points throughout its length and diameter to assure that it is uniformly round and not tapered. It is preferable to mount the bearings in one casting. In this way the two or more housing bores required can be machined during one setting, thereby, helping to assure accurate alignment.
In many applications, a quill-type design is required in order to obtain spindle adjustment. This type of assembly can be advantageous,
in certain applications, in that it allows assembly of the bearings on the shaft and insertion of the bearings and shaft into a housing as a
bench assembly. Quill-type designs are also used when the main frame is made of materials having low hardness such as aluminum.
Where screws are used to fasten parts into the main housing, adequate section should be left under the screw holes to prevent
distortion of the housing bore when the screws are secured and the covers or other parts are pulled tightly into place.
Bearing Spacers
Spacers mounted between units of a pair of bearings are preferably made of steel, hardened and ground and should be sturdy in cross-section. The length should be produced by grinding the inner ring spacer and outer ring spacer simultaneously. It is important that faces of the spacers are square and that their parallelism is the best possible. All corners should be rounded to remove sharp edges and burrs.
The inside diameter of the inner ring spacer should clear the shaft, but not be so loose as to make it possible to mount and run them
eccentrically. For short spacers and high operating speed a clearance of less than .001″ over the maximum shaft diameter is generally satisfactory. For long spacers and low speeds this clearance may be increased to prevent the shaft from disturbing the face parallelism of the spacer.
The outside diameter of the outer ring spacer should be about .001″ less than the minimum bore of the housing. The overall design of the inner ring and outer ring spacers should be made so that a minimum of dead air space is left in the cavity between the bearings.
Housing Seals
A labyrinth combination of slinger and end cover provides a highly effective seal against intrusion of foreign material. This seal
design is recommended for use over a wide range of speeds. For exceptional slow speed applications a combination of slinger and commercial contact type seal is usually employed.
Slingers should be completely machined to assure true running. Their diameters should be concentric with the bore. The outside diameter of the slinger is often tapered, to throw off cutting compounds, coolants, etc., from the point at which such liquids may enter the spindle. A drip or runout groove adjacent to the open lip of the end cover is highly desirable and practical.
The axial clearances of the internal faces between slinger and end cover should be about 1/16 of an inch. The first radial clearance opening on any design through which liquid may pass should be made very close, approximately .003/.005″ on a side. The inner radial clearance should be between .0075″ and .015″. These figures are based on successful practice.
In sophisticated oil-air-mist lubrication systems it has been found that exhaust porting must be supplied between the bearings and
labyrinth type seals in order to insure adequate lubrication of the bearings and sufficient air flow for cooling.
SHAFT AND HOUSING FITS
Shaft Fits
The main purpose of the shaft fit is to assure proper security of the inner ring to the shaft. Under normal conditions of shaft rotation, a loosely fitted inner ring will creep on the shaft leading to wear and peening. This condition will be further aggravated by increase of load or speed. To prevent creeping or slipping, the inner ring should be mounted firmly in place and held securely against the shaft shoulder. However, it is important that the shaft diameter should not be so great an interference fit as to cause undue radial preloading of the bearing. Such a condition could lead to excessive heat generation and increased power consumption.
As a general rule it is recommended that the shaft size and tolerance for seating extra-precision bearings be the same as the bearing bore.
In the case of pre‑ loaded bearings, the ideal shaft fit is a line-to-line fit since an excessively tight fit expands the bearing inner ring and
increases the bearing preload which can lead to overheating. In the case of extremely high-speed applications, however, a minimum press fit of the inner ring is required to insure that the proper fit will be maintained at operating speed. This press fit must be sufficient to compensate for expansion of inner ring due to centrifugal force. Any creeping or shifting of the inner ring on a high-speed device would tend to destroy the balance of the shaft assembly.
The extent of preload change due to an interference fit on the shaft can best be illustrated by the following example: A duplex pair of 2MM9111WI CR DUL bearings, with 35 pounds built-in preload, mounted on a shaft that provides an interference fit of .0004 inches will
have a mounted preload level of approximately 180 pounds. This significant increase in preload will result in elevated operating
temperatures.
Housing Fits
Under normal conditions of rotating shaft, the outer ring is stationary and should be mounted in the housing with a hand push or a light tap fit. Should the housing be the rotating member, the same fundamental considerations apply in mounting the outer ring that were used for the inner ring mounted on a rotating shaft.
As a general rule for rotating shaft applications, the minimum housing bore dimension for extra-precision bearings should be established
as the maximum bearing outside diameter. The tolerance of the housing bore should be the same as the tolerance for the outer ring.
Numerous designs utilize the fixed and floating principle. The previously mentioned fitting practice should be utilized on the fixed
end only. In order to insure that the opposite end will float, and to corn pen-sate for thermal changes within the device, it is necessary to supply a looser housing fit. Generally this fit will be sufficient if the average fit is made .0002″ looser than the average fit of the fixed end. If a heat source is present, such as an integral motor, added looseness in the housing will be required.
Topics: Bearings, Informational, Radial Ball Bearing | No Comments »
Tags: ball bearing, Fafnir, information, Timken
