Machine
tool bearings are precision angular contact bearings,
non-separable with outer ring relieved and available with 15º,
25º or 40º contact angles. These bearings, for critical applications,
are stocked as universally ground duplex pairs with standard
preloads and as single row bearings. A separate design for a
separable, single row bearing series with inner ring relieved
and 15º contact angle is also available. Duplex pairs can be
mounted back-to-back, face-to-face or tandem depending on the
loading expected. Due to high speeds, these bearings usually
require phenolic retainers, which have either a stepped or
cylindrical pocket design. These bearings are employed in a
variety of machine tool equipment for grinding, turning,
milling, routing, drilling and threading applications.
- Authorized distributor for SNFA, NTN, GMN, SKF, Nachi and NHBB
- 15, 25, 40 degree contact angles
- ABEC 1, 7, 7/9 and 9
- Steel and ceramic balls
- Standard and ultra-high speed small ball configurations
- Pair, triplex, and quad sets
- Light, medium and heavy preloads
- Oil holes and flanged specials
- Double direction angular contact
|
 |
Angular Contact
Angular contact bearings are ideally suited for high speed
applications where both axial and radial loads are to be
supported, and where system rigidity requires preloading. The
design inherently limits thrust loads to one direction, and
are generally used in pairs or sets. Radial load support is
limited and occurs only when thrust loads are present or
preload is used.
Angular contact ball bearings have
raceways in the inner and outer rings that are displaced with
respect to each other in the direction of the bearing axis. This
means that they are designed to accommodate combined loads, i.e.
simultaneously acting radial and axial loads.
The axial load carrying capacity of
angular contact ball bearings increases with increasing contact
angle. The contact angle α is defined as the angle between the
line joining the points of contact of the ball and the raceways
in the radial plane, along which the load is transmitted from
one raceway to another, and a line perpendicular to the bearing
axis.
Ceramic
Use of ceramic (silicon nitride) balls in place of steel
balls can radically improve bearing performance several ways.
Because ceramic balls are 50% lighter than steel balls, and
because their surface finish is almost perfectly smooth, they
exhibit vibration levels two to seven times lower than
conventional steel ball bearings.
Ceramic hybrid bearings also run at significantly lower
operating temperatures, and can allow running speeds to
increase by as much as 40% to 50%. Bearings with ceramic balls
have been proven to last up to five times longer than
conventional steel ball bearings. Lower operating temperatures
help extend lubricant life.
Benefits of ceramic bearings include increased service
life, improved accuracy and quality, lower operating costs,
increased productivity, and high temperature capability to
name a few.
Radial
Deep groove bearings have full shoulders on both sides of the
raceways of both inner and outer rings, with cages to separate
the balls. The deep groove design permits the support of either
radial or thrust loads. Because of this versatility they are
preferred for many applications. Offered in many sizes, with a
variety of cage types and in open, shielded, and sealed styles,
they are the logical choice for first consideration.
Ball Screw Support
Ball Screw Support Bearings are designed to provide maximum
axial rigidity and improved feeding accuracy for use with
precision ball screws. The are high accuracy angular
contact thrust bearings which are superior to combinations of
standard angular contact bearings or arrangements of radial
and thrust bearings for ball screw applications. Both
Metric Series and Inch Series are available.
