What size bearings does Huaqiao supply?
Huaqiao is the China largest supplier of miniature and instrument ball bearings.
To metric series,its bore dia is from 1mm to 30mm,outer dia 3mm to 45mm;
Inch series,the smallest bore dia is 1.984mm .
What materials are NMB bearings manufactured from?
Huaqiao produces bearings with two types of material. Chrome alloy steel
and stainless steel 440C or 304. Stainless steel is recommended for ball
bearings in applications where corrosion is a possibility, and is also
mainly for miniature bearings in which slight contamination can cause
disturbance of operation. Chrome alloy steel is harder, and will provide
a quieter run in applications where noise is a major concern.
Chrome alloy steel, however, will corrode at a faster rate than stainless steel.
Will stainless steel protect against rust?
Stainless steel is corrosion resistant, but will rust in corrosive environments.
Stainless steel will corrode at a much slower rate than chrome alloy steel.
What are shields and seals, and which one is better?
Shields and seals are in place to keep contamination out of the bearing.
In order of effectiveness, the enclosures that are offered are as follows:
metal shields, rubber non-contact seals, PTFE (Polytetrafluoroethylene) non-contact seals, and rubber contact seals. As the sealing performance is
increased, the torque to turn the bearing will also increase. It is important to
know the application's condition and life requirements so the best shield or
seal choice can be made. Specific information about the description of each
seal and the pros and cons can be found in the Shields and Seals section in
the catalog, or under Bearing Components in our Bearing Engineering Section.
What is ABEC?
ABEC is the acronym for the Annular Bearing Engineers Committee,
the standards committee of the American Bearing Manufacturers Association
(ABMA). The ABMA is the organization that set the grades of bearing tolerance
accuracy. Higher ABEC level means greater accuracy for bearing dimensions
and internal runouts in the manufacturing processes. This dimensional control
includes tolerances for outside diameters, inside diameters, width, and various
runouts within the bearing. ABEC grade does not control roundness, raceway
smoothness, or noise performance.
How do I hold the bearing in place in my application?
Holding the bearing in place can be done by using adhesive, pressing the inner
and/or outer ring in place, or by designing a bearing pocket that will enclose the
bearing. Each of these methods has its advantages, as can be seen in the Preloading
section. A few rules of thumb apply: For adhesive, care must be taken to keep
the adhesive from getting inside the bearing. Adhesive in the bearing will cause
the grease to breakdown, and the bearing will fail early. For press fitting the
bearing, the shaft and housing tolerances should be kept so that the interference
fit does not cause the bearing to bind. There should be some radial play
remaining in the bearing after press fit. Also, during the press fit installation
process, care must be taken not to damage the raceways and balls by not
supporting the rings that are being pressed. For the bearing pocket, care must
be taken to keep the inner and outer rings from moving freely in the bearing
pocket or on the shaft. Movement can cause heat build-up and premature failure
How fast can a bearing rotate?
The speed of a bearing will depend on the bearing size, the lubrication used,
the bearing material, the cage material and how long the life requirement is.
Bearings can typically rotate at high speeds with good life performance.
The speed rating section contains information on ring rotation.
Speed ratings are also listed as part of the index section.
Where can I get a bearing catalog?
Contact us directly, and we will send you Huaqiao miniature ball bearings catalogue.
ball bearing for special use