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needle bearings bearing housings tapered bearings tapered roller bearings
metric bearings ball bearings cylindrical bearings cylindrical roller bearings
pillow block bearings mounted bearings mounted roller bearings flange bearings
super precision bearings precision bearings spindle bearings duplex bearings
duplex spindle bearings spherical bearings spherical roller bearing, spherical
roller
bearings thrust bearing, thrust bearings angular contact bearing, angular
contact
bearings mounted ball bearing mounted ball bearings, roller bearing roller
bearings SKF ball bearings SKF Bearing Company tapers taper bearings
tapered bearing taper roller bearings idller bearings tapered roller bearings
cones cups tapered sets metric sets metric tapered sets precision tapered
assemblies tapered assemblies thrust bearings roller bearings roller
thrust bearing thrust roller bearing precision bearings
SKF bearings provide the highest quality bearings
with the longest possible service life. At Bearing Kinetics
we sell most SKF bearings, including all
the basic types of bearings like ball, cylindrical, tapered,
spherical, plain
and mounted. Sizes range from 1/2-inch OD ball bearings weighing less than an
ounce to 76-inch
OD slewing rings weighing more than 6 tons. Grades vary from ABEC 1, a relatively wide-tolerance industrial
grade to ABEC 7 and 9
super-precision machine tool grade.
High Precision Angular Contact Ball Bearings
High Precision Angular Contact Ball Bearings Product Comparison
SKF® high precision angular contact ball bearings have all the characteristics demanded by today’s machine tool spindles:
In fact, standard SKF high precision angular contact ball bearings have
the advantages of ABEC-9 runouts and the lowest noise
levels available,
features not built into other manufacturers’ standard products.
Other useful and unique features of SKF high precision angular contact
ball bearings that make them easy to use and highly
effective include:
Marking of bore, O.D. and box
The marking of each bearing’s bore, O.D., and box allow the user to see, at
a glance, the actual deviation from nominal of the
bearing within 1 micron
(0.00004 inch). This allows the user to keep the bearings sealed in their
original unbroken package,
maintaining bearing cleanliness prior to
installation.
Serialization of sets
Serialization of bearing sets allows tracking of bearing sets, which
prevents inadvertent mismatching. Within a set, bores and
O.D.s are
dimensionally matched to within one half of the permissible tolerance. When
bearings are replaced, the entire set of
angular contact ball bearings
should be replaced to obtain the full benefits of the design. Serialization
of each bearing in the set
allows the user to assure that an entire new set
of bearings is installed, making the job of installation easier.
Eccentricity points marked
Each bearing has the maximum points of eccentricity on the inner ring and
outer ring marked with an asterisk. Such marking is
important because it
helps reduce system runout errors and thus allows the production of more
accurate parts.
O.D. Marking for orientation
Nonuniversally ground preloaded sets are marked with a “V” across the set’s
O.D., showing the orientation of each bearing in
the set and the alignment
of the high points of eccentricity. This feature makes SKF high precision
angular contact ball bearings
easier to install and to use. (NOTE:
Universally ground pairs are not "V" marked on the O.D.)
SKF Hybrid Bearings
Precision balls made of silicon
nitride, a ceramic material, bring a new dimension to the potential of
rolling bearings and
other precision ball applications. Silicon nitride, or
Si3N4 has specific unique characteristics that can make it a better
choice
for a ball material in precision ball applications that require high speed,
high stiffness, high hardness, lower noise,
electrical insulation
properties, and high temperature capabilities.
SKF is a pioneer in the research and development of alternative materials
for precision balls and silicon nitride is one of
the newest materials. Balls made of silicon nitride signify a major
breakthrough in precision ball technology and bring new
potential to many rolling bearing application
Si3N4 balls in rolling bearings
Low density, low thermal expansion, higher modulus of surface elasticity,
less stringent lubrication requirements, very low
service finish, and low
conductivity are all inherent features of ceramic balls. These features
bring advantages that open up
many new possibilities for rolling bearings.
Several options exist to help realize significant new application
possibilities with hybrid precision bearings. Designers can
take advantage
of the benefits offered by ceramic balls in precision bearings by
incorporating them into high speed and
challenging applications.
Summary of hybrid benefits
Lower density- silicon nitride balls have a density of only 40% of
similar steel balls.
This means- Higher speeds, less weight, lower inertia, more rapid starts and stops.
Low friction- silicon nitride's low coefficient of friction
enhances wear resistance enabling bearings to run cooler even
when they are
poorly lubricated.
This means- Better lubrication, less noise, lower operating temperatures.
Higher modulus of elasticity-ceramic balls have a 50% higher modulus elasticity than steel
This means- increased bearing stiffness
Low conductivity- ceramic balls act as a barrier to electrical current passing between inner and outer rings.
This means- simple method of insulation.
Lower coefficient of thermal expansion- Ceramic balls have a thermal expansion only 29% of similar steel balls.
This means- Less sensitivity to temperature gradients for more accurate preload control.
SKF Single Row Angular Contact Ball Bearing
The machined brass cage version
of the SKF SRACBB provides better performance under harsh conditions. It can
be used
in applications where a pressed metal or polyamide (plastic) cage is
normally used, and offers the following advantages:
Applications
Size Availability: The machined brass cage can be identified by
the letter "M" in the suffix of the bearing designation. some
examples of
universally matchable SKF SRACBB designations in their respective size
ranges are:
| Size | Old Suffix | New Suffix* |
|---|---|---|
| 7204-7222 | BEAGM | BECBM |
| 7224-7232 | MG | BCBM |
| 7304-7322 | BEAGM | BECBM |
| 7324-7328 | MG | BCBM |
| 7405-7415 | BMG | BCBM |
| 7416,7418-20 | MG | BCBM |
SKF Double-Row Angular Contact Ball Bearings
SKF double-row ball bearings
are available in A-type (conrad construction) and E-type (maximum capacity
with filling notch).
Conrad-type bearings feature a 30 degree contact angle.
The 30 degree angle allows for greater axial loads than competitive
bearings
with lower contact angles. For SKF double-row bearings with an A, AH, E or M
suffix, the contact angles converge
outside of the bearing for increased
resistance to misalignment. Conrad-type double-row ball bearings can take
heavy radial
load and axial loads equally in either direction.
A-type (conrad design)
SKF double-row ball bearings are available with seals, shields and snap
rings. The open variant of the SKF double-row ball
bearing features a new
design that offers these key benefits:
Conrad-type bearings are available in 5200, 5300
and 5400 series in a wide range of sizes. A pressed steel, snap-on cage is
standard for most sizes of this bearing type. A machined brass cage is also
available as standard on specific sizes. A polyamide
cage is optional in
selected sizes to meet the requirements of your specific application.
E-type (maximum capacity)
SKF E-type double-row ball bearings have filling notches on one side to
permit assembling the maximum number of balls into
the bearing. Similar to
the conrad-type, the contact angles in the max-type design converge outside
of the bearing. E-type bearings
are available with seals, shields or snap
rings, or a combination of these components. The bearings have the capacity
to handle
heavy radial loads. They also have thrust capacity in one
direction, with the ability to accommodate light thrust load in the
reversing
direction.
Max-type bearings are available in 5200 and
5300 series in a wide range of sizes. A pressed steel snap-on cage is
standard for this
bearing type.
Applications
We are not authorized distributors for NTN, SKF,
Fafnir, Torrington, McGill, Nice, Nachi.
Rollway, Sealmaster, Timken, FAG, Hoover-NSK, Bardon, Kaydon, Kaydon, Koyo,
Thomson,
Bower, Bowden, RHP, MRC, or Hyatt bearings.
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