New thin section contact series ball bearings feature four-point
contact or conrad styles from Quality Bearings & Components (QBC)

Quality Bearings & Components (QBC) are offering a new line of thin section four point contact series of ball bearings. This dynamic new series also comes in the innovative Conrad style that features Conrad radial contact points and the angular contact style that utilizes angular contact single bearings which are both reliable and cost-effective. This new line is available in 52100 chrome steel with a snap-over cage feature. They are rated ABEC 1 and may be ordered in stainless steel as well. Quotes plus online orders are available at the new QBC eStore. These quality designs ensure reduced friction, quiet operating ability and increased durability.

QBC has in stock: miniature bearings, plastic bearings, rod end bearings, spherical bearings, pillow blocks, sintered bronze bushings, radial ball bearings, thrust bearings & washers, sleeve bearings, needle bearings, inner races, roller clutches, guide wheels & rail systems, linear ball bearings, inner and outer ring spacers and shafting. QBC stocks both inch and metric sizes. Our eStore allows you to check price and availability, place an order or request a quote anytime. QBC also provides custom-made bearings and shafting to the customer print. We also offer on-site relubing of bearings in a certified class 1000 clean room.

Detailed technical specifications are contained in catalogue B620, available free upon request from Quality Bearings & Components. This catalog can be viewed now, in PDF format, and downloaded by section on website: www.qbcbearings.com or via mail request at: 125 Railroad Avenue, Garden City Park, NY 11040-5016.

Natural rubber suspension mounts from AAC
are designed for suspending from 56 to 112 Lbs

Natural rubber suspension mounts from Advanced Antivibration Components (AAC) are designed to isolate suspended products that weigh from 56 lbs. up to 112 lbs. A popular use for these vibration isolators involves their use in suspending piping in heating, ventilating and air conditioning - HVAC applications.
 
There are 4 mounts identified as the V10Z72MTG Series, which are constructed with a carbon steel housing. The isolator is made from natural rubber. The maximum deflection of these units is 6 mm (.24 in.). Their natural frequency ranges from 7 to 12 Hz. Other AAC rubber suspension mounts are designed to support weights up to 220 lbs. They are best suited for hanging small machines such as fans, distribution pipes and ducts from ceilings. At the AAC eStore you can check price and availability, place an online order, download 3-D models, or request a quote at anytime.

 Additional technical specifications are contained in Catalogue V110 available free upon request from Advanced Antivibration Components (AAC), 2101 Jericho Turnpike, Box 5416, New Hyde Park, New York USA 11042-5416. Phone: 516-328-3662, Fax: 516-328-3365.

For further information, view website: http://vibrationmounts.com/NewProducts/Rubber_Suspend.htm   Refer to page 40

New Daylight™ ESD Mag Lamp provides full protection

Daylight has launched its first ESD Ultra Slim Magnifying Lamp.  The company's latest lamp designed specifically for professional and industrial environments provides full protection against static electricity and electrostatic discharge (ESD).

The COMPLETE lamp (Head, Lens, Joint & Arm) is grounded and has special static dissipative materials to smoothly take away static charges in a controlled manner, preventing any build up of static electricity which gives complete protection against ESD events. The lamp has a high-grade optical white glass lens for precision magnification and comes with a 12 diopter swing arm lens included for situation where high magnification is required.

The ESD lamp has been independently verified to be suitable for use in EPA (Electrostatic Protected Areas - IEC 61340-5-1 and ANSI/ESD 20:20).

The lamp can be used in EPA rooms because the special static dissipative coatings and materials stop the build up of electrostatic fields and prevent the attraction of particles.

By choosing the Daylight ESD Magnifying Lamp you get the best light, the best magnification and guarantees full protection against static electricity and ESD. Better safe than sorry!

Key features of the D22091 ESD Ultra Slim Magnifying Lamp
1) Ergonomic and professional ESD safe magnifying lamp. 2) For use on workstations where ESD sensitive devices are being handled. 3) Powerful 28w Daylight™ energy saving tube (150w equivilent). 4) 17.5cm/7" precision optical white glass lens to see more of your work (1.75X, 3 diopter). 5) New head-joint to smoothly direct the light exactly where you need it. 6) Flicker-free electronic ballast, work for longer in optimal comfort. 7) High quality metal arm for optimal flexibility and durability. 8) Quick Lens Swap System™, increase the magnification in seconds and without any tools. 9) Solid lamp stem and sturdy metal clamp for your workstation. 10) Practical lens cover to protect the lens from sun and dust. 11) 4cm/1.5" precision optical white glass swing arm lens included (4.0X, 12 diopter). 12) 13cm/5" precision optical white glass lens available separately (2.25X, 5 diopter).

For further information on Daylight's™ full range of products or for details, order online or to obtain details of the nearest stockist in the area in which you are located,  view the company's website: www.daylightcompany.com

Selecting the Right Rolling Bearings

Rolling bearings are critical components in rotating machinery, production systems and vehicles. Here, Schaeffler provides some useful tips and guidance for engineers on how to select the most appropriate bearing for the application.
 
Mechanical design engineers often have to specify and select suitable rolling bearings. Even simple shaft systems subjected to radial and axial loads running at defined speeds can still place huge demands on the rolling bearings. The adjacent housing, for example, influences the shaft and the design of the bearings. Other factors such as temperature or sealing requirements are also important. The designer therefore has to find an appropriate method of supporting the shaft by using rolling bearings in such a way that the loads involved, the speeds required, the adjacent construction and environmental conditions, are all taken into account in order to ensure a reliably functioning shaft system.

In some cases, the designer may be able to use his or her experience and knowledge to design the shaft bearing arrangement. However, this could result in a bearing arrangement that is over-engineered and therefore not cost effective. Or worse still, the bearings may simply fail to fulfil the functions required of the shaft.
 
In order to determine the correct shaft bearing arrangement, several factors need to be considered. First, engineers need to consider how precisely the shaft needs to be guided. Are there any external constraints or forces that could be eliminated by the correct shaft bearing arrangement using appropriate degrees of freedom? Is shaft deflection likely or is the shaft sufficiently rigid? Will there be significant thermal elongation when the operating temperature is reached? Is the shaft itself driven or does it drive another component? Will the shaft be affected by vibration or oscillation caused by these other components? Can the shaft be aligned accurately or should allowances be made for any misalignments?
 
For example, a different bearing arrangement with two tapered roller or angular contact ball bearings will offer precise shaft guidance but can also exert constraining forces on the shaft and bearing system due to internal axial forces caused by inaccuracies in the adjacent construction. The designer can solve this by using cylindrical roller bearings with a defined axial clearance rather than changing the bearing arrangement. The classic locating/non-locating bearing arrangement, on the other hand, compensates for factors arising from the adjacent construction as well as any thermal expansion.
 
The bearing arrangement determines the types of rolling bearings that are selected. If a different bearing arrangement with tapered roller or angular contact ball bearings suitable for unilateral loads, or even cylindrical roller bearings is sufficient, the locating/non-locating bearing arrangement requires a bearing on the locating side that can support axial loads in both directions. In this case, the designer can select radial ball bearings, spherical roller bearings or cylindrical roller bearings. The function of the non-locating bearing is then fulfilled by radial ball bearings or spherical roller bearings with a moveable outer ring (sliding seat) or classic non-locating bearings such as cylindrical roller bearings, needle roller and drawn cup bearings.
 
For any application, the design envelope and load direction are not sufficient as a means of selecting a suitable rolling bearing. The required life and operating conditions raise numerous questions that can either confirm or reject the bearing selected. If the factors that influence the rating life of the bearing are known or need to be optimised, in most cases the adjusted rating life can be used for life calculations, which often enables the system to be downsized.
 
 Once the designer has calculated and defined the forces, speeds and other conditions for the bearing arrangements, the most appropriate rolling bearings need to be incorporated.
 
This method of selecting the right rolling bearing is, however, "distorted" by the wide variety of bearing types and series. Many of the characteristics of rolling bearings are present to a greater or lesser extent in numerous bearing types, while other required characteristics are absent in certain rolling bearings.
 
In typical rolling bearing catalogues, several bearing types may appear to fulfil the requirements of the shaft bearing arrangement. In addition to the dimensions of the bearings, there will also be various statements relating to basic load ratings, speeds and mounting. This technical data should help to narrow down the different types of rolling bearing that can be used.
 
However, other important questions then need to be asked such as: "How long must the bearing last? Will it support the necessary speeds? Do the lubricants used for the shaft system fulfil the requirements of the rolling bearings? What lubrication does the rolling bearing require?
 
This is where a good bearings supplier can advise and guide the customer into selecting the best bearings for the application. The designer can learn how the various factors - load, speed, internal stresses in the bearing material, the viscosity and cleanliness of the lubricant, as well as the size and hardness of the contaminant particles, the additives and the environmental conditions - affect the expected life of the bearings.
 
The type of lubricant can have a considerable effect on the rating life, and contaminants in the lubricant cause increased wear in the bearing. If the operating viscosity is above the nominal viscosity required for the rolling bearing, this supports lubricant film formation and therefore the expected life of the bearing. In contrast, an inadequate operating viscosity does not permit lubricant film formation, which impairs the rating life of the bearing. For further information, e-mail: info.uk@schaeffler.com   Refer to page 27