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elcome to the first issue of National eNews, a quarterly email
communication to our customers.
National eNews was created for you
by the many talented individuals at the National Precision Bearing Group of Mechatronics. |
It will be our goal to provide you with interesting and relevant
information related to the bearing industry, particular products and National
Precision Bearing in general. You will have an opportunity to review articles on a
number of topics written by our engineers, product managers and specialists. It
is our hope that you will find the information to be valuable as well as informative.
Most topics will focus on bearing and bearing related products offered by
National Precision Bearing, while others identify current industry trends and
developments. Please take a few minutes to review the short list of topics available this quarter.
We
are certain you will find them interesting. Please contact me directly if there are subjects you would like
to see covered in future issues. >>Email Editor |
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NPB Self-Lubricating Spherical Plain Bearings
In addition to our standard line of metal to metal spherical plain bearings (requiring maintenance), NPB
also offers a full range of maintenance free sizes.
NPB self-lubricating spherical plain bearings are designed for applications that require extended life
without maintenance, or where operating conditions are such that the use of the standard steel on
steel bearing is inadvisable. They are particularly well suited when the loading is in one direction, as
single directional loading prevents grease or oil from flowing into the load zone. |
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Instead, self-lubricating
bearings utilize a liner system that is bonded to the inside diameter
of the outer ring. The chrome plated inner ring, or ball, provides a
smooth, hard surface to run against this liner system.
Part number and dimensional information can be found on our
website at:
Inch Series - www.nationalprecision.com/si4.htm
Metric Series - www.nationalprecision.com/sm10.htm
Contact your Technical Sales Specialist for more details:
www.nationalprecision.com/c2bsales.htm
Ron Gopal, National Accounts Manager |
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To get the answer to this question it may better to start with a
different question. So let’s try this one – What does an Angular
Contact Bearing offer a designer that a Radial Ball Bearing
doesn’t?
The easy answer to that question is additional thrust load
capacity. So let’s take a look at how a thrust load affects a ball
bearing. Here are images of a standard bearing (left image)
and an angular contact bearing (right image).
The amount of thrust load a bearing can carry is directly
related to the contact angle, shown in the drawing. Standard
miniature bearings, for example, generally have contact angles
of 9-25 degrees, depending on the radial play. Angular contact bearings are available with contact
angles from 15 to 40 degrees.This allows them to carry a much higher thrust load. |
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A radial ball bearing is designed to have the load primarily in a direction perpendicular to the axis
of the bearing, that is, directly toward the center of the bearing. Depending on the radial play of the
bearing, some thrust loading is possible.
Angular contact ball bearings also have raceways in the inner and outer rings that are displaced with
respect to each other in the direction of the bearing axis. This allows them to reduce the compression
loading on the balls while being loaded in the axial direction as well as in the radial direction.
The important thing to remember in the design of an application is to take into account the amount of
thrust loading a bearing will be under. In most cases it will be dealt with by selecting the correct radial
play, but every once in while it will be appropriate to select an Angular Contact Ball Bearing.
Bill Banning, Miniature & Instrument Bearings Product Manager |
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National Precision Bearing has recently improved the structure of our sales teams to provide you
with a superior sales experience. As you know there are differences in industry and bearing needs
throughout the US. Aircraft suppliers, robotics, agricultural customers and medical business vary
in location, as do all other types of commercial and manufacturing businesses. We analyzed the
strengths of our Sales and Sales support staff so we could create teams to better serve each region of
the country.
Your sales team includes the Field Salesperson, Technical Sales Specialist and Sales Assistant. The
Field Salesperson can be onsite on short notice to meet your bearing and bearing application needs.
Meanwhile, you have instant access to your Technical Salesperson in Preston to give you price and
delivery, as well as arrange blanket orders or source future stock needs. When you need to check
status of an order or get a tracking number your Sales Support person will make that their priority.
Each member is familiar with your account and any arrangement needed for the smooth running of
your business. The Regional Team insures that at all times you have continuity of service and can get
your questions answered.
Click here to see your Field Salesperson www.nationalprecision.com/c2sales.htm
Please consider the following special services and explore with your sales team any that will make
your job easier or be more cost-effective for your organization:
| • Special packaging requirements |
• Relubrication of your bearing inventory |
| • Lubes for special applications |
• Assemblies of bearings with their housings |
| • Consignment of inventory |
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For more information: www.nationalprecision.com/c1coinfo.htm
Louie Seaman, Sales Manager |
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BOEING SUPPLIERS
Boeing – Approved Sources – found as Approved Process Sources D1-4426
If you are doing business with Boeing and/or their sub-contractors it is important to buy from an
authorized source. On the site linked below you will find the heading: Authorized Manufacturers of
Aircraft Bearings. Click link to Document D1-4426 – Qualified Manufacturers Having Approved
Distributors. The D1-4426 list can be found on the web @
http://active.boeing.com/doingbiz/d14426/bfmanuf.cfm?Type_cd=B
This list shows those manufacturers and distributors that have been qualified by Boeing Engineering. National Precision Bearing appears as ‘Mechatronics’ throughout this list, under a number of
qualified manufacturers. Click on a manufacturer to find us.
Our company has been and is routinely audited to insure that we are always current with Boeing’s
stringent quality requirements.
Buying aircraft bearings for Boeing aircraft from anyone not listed on this document can be risky and
can lead to potential rejections. At Mechatronics our goal is to provide fully approved and traceable
product in each and every case. All products are to the latest Boeing drawing revision as part of our
standard practice.
We welcome your business for products used on Boeing’s extensive family of aircraft.
Bruce Dumas, Aerospace Bearings Product Manager
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NATIONAL PRECISION BEARING GROUP of Mechatronics, Inc.
Phone: 800-426-8038 • 425-222-5900 • Fax: 888-448-1153 • 425-222-5950
E-mail: sales@nationalprecision.com
Copyright © 2008, National Precision Bearing, Inc.
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