Archive for January, 2011

Done with Mitsuboshi Belts, now on to Chain ….

Thursday, January 27th, 2011

And the chain of choice is Hitachi Maxco, with 3 stateside locations in Atlanta, GA; Portland, OR; and Chicago, IL. 

In 1987 Hitachi Maxco, Ltd, introduced the first premium line of solid bushing/solid roller industrial roller chains to the North American marketplace.  Technology advanced manufacturing and part finishing techniques allow this series to competitively replace traditional curled components and extend chain life.

Today, Hitachi continues to invest heavily in developing advanced product solutions for industry.  Their innovations in the area of chain strength and wear performance, corrosion protection and maintenance free operation are solving problems, and providing value to their customers and partners.

Whether for power transmission or conveying; in the food and beverage, packaging, forest products, mining, pharmaceutical, automotive, or high-speed printing industries, count on Hitachi to provide the ultimate in performance and value in industrial roller chain products.

Neo-SBR

In 1997, Hitachi added a unique coating to pins and bushings and re-designed the connecting line.  A good product was made better as their design focus shifted to improving chain wear life and improving the endurance of the connecting link.

The new coating assisted lubrication and protected against corrosion.  A 5%-10% increase in wear life was achieved and Hitachi roller chains were now challenging the best products in the world.

The INSPIRE SERIES SBR

Today Hitachi stands poised to offer a quantum leap in the performance of standard roller chain.  New innovations in manufacturing technologies and parts processing have led to the development of their new INSPIRE SERIES SBR line of standard roller chain products.

A unique patent pending, “Hi-Energy Mechanical Process” is performed on all of the chain’s components and has yielded surprising benefits in both the fatigue strength and wear performance of this remarkable new series.  Hitachi’s  INSPIRE SERIES SBR chains possess the highest working load and horsepower capacity ratings in the world.

Since I’m in the process of working on my belt database …..

Tuesday, January 25th, 2011

….. why not talk about belts?

Where can I start.  Why not talk about types .. that sounds like a good place to start.

FHP (3L, 4L, 5L)

  • Designed for light duty, frictional horsepower drives
  • Capable of handling drives with backside idler
  • external wrapping provides a smooth and quiet operation with minimum vibration
  • heat and oil resistant, static conductive

V-Ribbed Belts

Ribstar (J,L,M,PK)

This belt combines the properties or the V-Belt’s high power transmission capability and the Flat Belt flexibility.

  • High-efficiency operation at high speed
  • it can be used on a small diameter pulley because of its enhanced flexibility
  • excellent heat resistance and abrasion resistance
  • compact design application with little belt vibration

Synchronous Belts

Timing belt G (XL, L, H, XH, XXH)

This synchronous transmission belt eliminates the problems of chains and gears.  Extra small pitch type fits well for precision equipment and IT systems

  • thin, lightweight and superior flexibility of this belt allows compact design application
  • it enables efficient high speed power transmission
  • low noise operation compared to chain/gear
  • maintenance free
  • belt can be used in the temperature range between -30 degrees and +90 degrees Celsius

Timing belt U (T80, XL, L, T5, T10)

With its high abrasion resistance and lesser rubber dust dispersion, polyurethane timing belts are suitable for use in place where clean environment are required

  • the best for light-duty transmission which requires high precision
  • suitable for paper feeding use because it does not contaminate contact subject
  • smooth and quiet operation as it is flexible to fit well in small diameter pulleys
  • made to order system enables manufacture of special form order

Super Torque timing belt G&GN (S1.5M, S2M, S3M, S5M, S8M, S14M)

The round tooth belt has a high power transmission property, it expands existing applications of timing betls significantly.  It can be used as an alternative for chains and gears.

  • longer operating life
  • quiet operation
  • possible to transmit high torque with small belt
  • smooth meshing allows noiseless operation

Mega Torque Timing Belt G&U (MTS5M, MTS8M, MTS14M)

  • large transmission capacity is achievable as time of Super Torque G (Rubber)
  • compact design possible — approximately 40% smaller on average for the same pulley diameter and Super Torge G (rubber)
  • existing pulley models can be used.  Super Torque (S8M, S14M) pulley can be used as normal

Industrial V-Belts

Conventional (A, B, C, D, E)

This type is most commonly used as a means for power transmission.  It is economic and available in the market.

  • MBL’s “SET-FREE” system for multiple belt usage is very effective to reduce dimensional differences of each belt
  • Conventional V-Belt is a heavy-duty power transmission belt, which has heat, oil and flex resistance as well as high antistatic property

Triplex Rawedge Cogged (AX, BX, CX)

Widely used power transmission belt.  Cost efficient, ready available and easy changeable

  • designed for tough, small sheave, high speed applications
  • higher horsepower rating requires fewer belts and sheave grooves resulting in lighter more compact drives with lower overall cost
  • heat and oil resistant, static conductive

Maxstar Wedge – Narrow (3V, 5V, 8V)

It has unique, narrow width and high power transmission capability

  • energy-saving and compact design application
  • possible to operate with maximum speed of 40m/sec
  • effective for installations where overall drive cost must be reduced
  • heat and oil resistant, static conductive

Maxstar Wedge Supreme – Narrow Cogged (3VX, 5VX)

Cogged construction reduces bending stress and dissipate heat, especially on drives with smaller sheaves

  • recommended for drives where compact design is required, high speed is necessary and increased horse power needed
  • heat and oil resistant, static conductive

Industrial Banded V-Belts

Conventional Banded (RB, RC, RD)

Triplex Rawedge Cogged (RBX, RCX)

Maxstar Wedge Narrow (R3V, R5V, R8V)

Maxstar Wedge Supreme Narrow Cogged (R5VX)

All the quality features and benefits of single belts — PLUS

  • designed for tough applications where multiple drive belts are subject to heavy shock and pulsating loads
  • banding prevents belt whip, belt turnover, vibration and jumping off that may occur with single belt in multiple drive applications
  • lateral rigidity keeps the belt running in a straight line as it enters the pulley grooves during strong pulsating or shock loads for reduced wear
  • frictional and wedging principles of the V-Belt drive apply and prevent slip at low tension and low bearing loads

Specialty Belts

Double Angle V (AA, BB, CC)

  • for drives where power must be transmitted by both the top and bottom of the belt
  • belts flex equally well in both directions for positive pulley contact
  • good for serpentine or reverse belt drives
  • oil and heat resistant

Vari-Star Variable Speed Belt

  • for drives requiring exact speed control and a maximum range of speed changes
  • cogged design provides flexibility, greater heat dissipation, wide sped ranges and is resistant to cracking
  • strong compression section provides crosswise rigidity that resists distortion
  • oil and heat resistant, static conductive

Polymax Belt (3M, 5M, 7M, 11M)

This is a wide angle belt with an angle of approximately 60 degrees

  • high-speed power transmission with low vibration
  • compact design and cost efficient
  • maintenance free and stretch resistance
  • excellent weather resistance

Super KB Premium FHP Belts (3LK, 4LK, 5LK)

  • for severe operating conditions where light duty FHP belts may stretch or pull apart due to heavy shock loads.
  • aramid fiber is used in the tensile cord for length stability
  • provide greater horsepower than light duty FHP belts
  • special outer covering designed for smooth clutching and backside idler applications
  • resist temperatures extremes, high humidity, oil and cracking

Open End V Perforated (QM, QA, QB, QC)

  • for drives where the installation of an endless V-belt is not practical
  • often used as a temporary V-belt replacement when the original belt is hot immediately available
  • perforated open-end design uses metal fasteners for connecting

The above information was found on one of our MBL/Mitsuboshi flyers.  We are proud to be a supplier for MBL/Mitsuboshi and will be respectfully offering this line on our storefront.

Oh oh .. Have run into a road block …..

Thursday, January 20th, 2011

Help — I’ve fallen and can’t get up. 

Now that I’ve used the allotment of cliches where do I go from here.  Even the best of us run into brain blocks, and I’m no exception.  I have been doing research, and working hard learning the background information for the new website, www.bearingsinc.net that is soon to be launched.  I know “you’ve heard this all before”, but be assured that it is close to launch date, and it will change consistently once it is launched.  We want to make it better and easier for you to use. 

Right now, I have uploaded “most” of our Timken line; which is our biggest line.  This consists of both ball and roller bearings.  Ball bearings consisting of Angular contact, Wide inner ring, and Housed units. Roller bearings consisting of the Tapered Roller Bearings Cups, cones, and sets that Timken has always been famous for. 

I have also uploaded our Koyo Ball bearing line, which could offer some of the same parts as Timken.  We also have SKF-Chicago Rawhide currently uploaded which offers seals, and speedi sleeves.

In my plans, and my next uploading attempts consist of Koyo NEEDLE bearing line, and MBL (Mitsuboshi) belts.  These will cover quite a bit of items we can currently offer, but you need to watch the sight because once it’s launched, I will be configuring other databases to upload.  This way it will keep the sight changing, and interesting. 

New items = new choices = more options

While I’m not making any promises of a launch date; keep in touch and help us celebrate our launch when all of our hard work has finally come to an end.

Service Conditions Affecting Selection of Type — Part 3

Tuesday, January 18th, 2011

Shock Loads – Reversing Loads – Intermittent and Variable Loads

All bearings listed herein are capable of carrying for short intervals overloads and shock or reversing loads of an intermittent or variable nature, in excess of the ratings assigned.  Where these loads occur due to abnormal, seldom-repeated conditions, it is not necessary to provide additional capacity, but avoidable, suitable additional capacity is desirable.  Bearings are capable of carrying for short periods, loads 100% in excess of their capacity.  It should be remembered, however, that shock loads, even of short duration, can have the effect of much higher steady loads than is usually appreciated, and liberal allowances should be made under conditions of this sort.

Overloads

Aside from the abnormal shock load consideration, bearings may be regularly subjected to loads beyond their normal rating if for short periods of operation only, as in low gear speeds of automobiles and trucks.  Experience has shown that in cases of this nature bearings may operate satisfactorily for many years even though regularly exposed to low gear loads of from two to three times their rating.  Loads due to heavy starting torques and stalling torques may also be carried satisfactorily.  While these overloads can be handled by the reserve capacity of the bearing, it is always well to consider their nature and duration and make any allowance possible for them.  In other words, the mere fact that bearings have reserve capacityshould not suggest complete disregard for shock and overloads.  In some cases special retainers may be needed to meet severe conditions and consultation with the bearing makers engineering department is then most desirable.

High Speeds

Ball bearings operatevery satisfactorily at speeds beyond the range of satisfactory experience with plain bearings, and are today operating up to 50,000 revolutions per minute.  Speeds as high as 10,000 and 15,000 RPM are common.  With high speeds extra precision is generally desirable, and the Non-Filling Slot Type, having a completely symmetrical inner ring, offers more as regards perfect balance than the Maximum Type.  It is best with very high speed conditions to design the simplest bearing assembly possible using the Single Row Types; and the more complicated types, such as Double Row, Grease-Shield, and Felt-Seal Bearings, should not be used except when no other solution of the problem is possible.  Furthermore, since the Extra-Precision Bearings meet high speed requirements better than the standard tolerance bearings, they should be used at the higher speeds.

Misalignment

Housings and shafts should be processed in such a way s to make bearingseats as concentric as possible.  All shoulders, faces, etc., involved in the location of bearings should be square and true with the shaft axis.  However, in some cases it is not always possible to bring these factors into accurate relationship, and resort must then be had to self-aligning bearings of various designs.  The single row deep-groove bearing may be also supplied with slightly increased internal looseness to compensate for minor degrees of inaccuracy.  Where bearings are mounted in loose blocks or where parts cannot be accurately machined at succeeding operations, these points should be studied and compensated for by the proper selection in bearing type or by suitable changes in an otherwise standard assembly.

Outer Ring Rotation

In most applications the inner ring of the bearing rotates with the shaft and the outer ring is stationary in the housing. In loose pulleys and other similar applications, the shaft is stationary and the outer ring rotates around the stationary inner ring.  This calls for a type of mounting wherein the outer ring is tightly pressed into the bore of the housing and the inner ring is a slip fit on the shaft,thus insuring the driven element of the ball bearing (in this case the outer ring) rotating positively with the housing.  Since the rotationof the outer ring produces a greater ball speed than if the inner ring were rotated at the same RPM, it is necessary to compensate for this condition by applying a correction factor.  The actual RPM of the outer ring is multiplied by this factor, and the load rating determined from the tables for this speed. This then is the capacity of the bearing when the outer ring rotates.

These factors are:

  • Light Series ——- 1.5
  • Medium Series — 1.7
  • Heavy Series —–1.9

Service Conditions Affecting Selection of Type — Part 2

Thursday, January 13th, 2011

Space Restrictions

Loads which can be carried in one way by a number of bearings or by a specific size of bearing may sometimes be more satisfactorily carried by another type when it is desired to reduce the space occupied by the bearing diameter because of definite limitation imposed for distances between shafts or other interfering parts of the mechanism.  A good example of this is in the use of the smaller Double Road Baring to replace a Singe Row Bearing of larger diameter in cases where the housing diameter must be kept as small as possible.  The Narrow Width Bearings may also be advantageously used where restrictions make a reduction in assembly length imperative.  Where provision cannot be made for suitable protection featurs in the housing members themselves, the Grease-Shield Bearing and the Felt-Seal Bearing lend themselves admirably to a most efficient application from the standpoint of space occupied.  In general it is desirable to select, wherever possible, the more common types of bearings for a given application, principally the variations of the Single Row Type, but the other types are available where conditions demand other designs, and are widely used for meeting space and weight problems.

Temperature Conditions

Rise in temperature has the effect of increasing diameters and lengths of shafts, rings, housing, etc., due to expansion of metals.  Consequently, when temperatures are such as to cause an expansion of any parts after the apparatus has been set up, due allowance must be made to take care of this.  A typical instance is illustrated in the case of an induced draft fan handling hot gases.  The shafts expand on being subjected to this heat, and one or more of the bearings supporting the shaft must therefore move laterally to avoid assuming a heavy thrust load from this expansion.  Normally, all conventional single row applications are mounted with one bearing fixed axially, the other floating, and in many cases the temperature variation may only be such that this arrangement is sufficient.  Where the temperature rise is rather extreme, however, special design provisions should be made to permit compensating adequately for the maximum expansion.

Temperature may affect bearing rings in another way.  It may be that the inner ring is exposed to heat transmitted through the shaft, whereas the outer ring is kept relatively cool due to passage of air or radiation from the housing.  This is well illustrated by motors of certain types, wherein the temperature rise of shafts exceeds that of the outer ring, which is more or less cooled by the passage of air through the ventilating opening.  For this type of temperature condition it is necessary to resort to greater radial clearance in the bearing, as provided by an increased clearance between balls and rings. When temperatures in excess of 125 degrees Fahrenheit are involved, it is best to consult the supplier engineering department, since not only may special features relating to the bearing be necessary, but some consultation on lubricants and lubrication is also advisable.

Acids, Gases, Moisture

Problems involving acids, such as acetic and sulphuric, fumes of a decidedly corrosive nature, or applications submerged in water, demand special treatment from the standpoint of bearings and housing, and should not be undertaken without consulting experienced bearing engineers.  Housings may be made of special alloys and the bearings themselves may be of stainless steels.  In cases of moderate exposure, synthetic lacquers may be used to retard corrosive action.  When housings incorporate sealing felts the felts must be specially treated to add resistance to deterioration. Unprotected anti-friction bearings will not operate satisfactorily submerged in water or other liquids, since a definite amount of lubricant is required, and if absent rapid abrading of the ball retainers and other parts will result.

Coming up on Tuesday, January18, 2011 ….

Service Conditions Affecting Selection of Type — Part 3

  • Shock loads–Reversing Loads–Intermittent and Variable Loads
  • Overloads
  • High Speeds
  • Misalignment
  • Outer Ring Rotation

Service Conditions Affecting Selection of Type

Tuesday, January 11th, 2011

Radial Type of Load

Bearings of the Single Row Radial Type(both Non-filling slot and maximum constructions) Extra Small Series, Narrow Width, Radial-Thrust, Open Type, Double Row Angular Contact, Grease-Shield, Felt-seal, Self-Aligning, Adapter — and the Wider Inner Ring Bearing with its assembly variations — are all suitable for carrying radial loads.  From among these styles the proper type and size of bearing can be selected to carry the specific loads imposed – as determined by a simple calculation and by reference to the recommended factors of safety in connection with the load capacities tabulated herein. 

Absolutely pure radial load exists infrequently for even in applications where only  radial load is theoretically possible, there are slight inaccuracies in alignment (due to locating forces) which may place some degree of thrust load on the bearings.  Thrust loads of this variety may be neglected, however, in the presence of the predominantly radial loads.

Thrust Type of Load

Where the weight of parts or actual thrust loads caused by hears or other driving methods must be considered in the design, variations of the radial type, or perhaps pure thrust bearings, may be necessary. Al of the conventional types of bearings mentioned above have thrust load carrying ability to varying degrees, in addition to their radial ability.

Bearings of the Thrust Type will carry pure thrust loads where no radial load is involved, or where the radial load is carried by another radial support.  For the lower range of speeds the Thrust Type Bearing is very satisfactory, and it is merely necessary to make a selection as to size, based on the load requirements.

In a great many cases, however, and nearly always where pitch line speeds are high, the once popular ball thrust bearing is being replaced with a variation of the radial bearing, since the latter type is more versatile in operation. In some cases the Non-Filling Slot Type of Radial bearing lends itself admirably to the carrying of rather appreciable thrust loads.  And still greater thrust carrying ability is available with the Radial-Thrust or Angular-Contact Type, and the Duplex Units (particularly the tandem arrangement of bearings).

Combination Type Of Load

There are many cases in mechanisms where radial loads and thrust loads are combined, and there are many bearings with ability to carry these combinations very satisfactorily.  Bearings of the single row radial type, the extra small series, the narrow width series, the radial-thrust type, the open type, the double row angular-contact, the grease shield, felt-seal, and self aligning bearings, as well as the wide inner ring units and assemblies are suitable for carrying combined loads within their respective capacities.

Upcoming on Thursday … January 13 ….

Service conditions Affecting Selection of Type —– continued

  • Space Restrictions
  • Temperature Conditions
  • Acids, Gases, Moisture

I can honestly say ……..

Thursday, January 6th, 2011

…… that our new site located at WWW.BEARINGSINC.NET is in it’s last steps to becoming live!  The site will change on a regular basis as we continue to upload our inventory onto it… so you need to stop by often to watch the changes, and enjoy the growth with us!

We’re excited, and I know that you will be too !!!

Check it out at www.bearingsinc.net!!!!        Check it out !!!