Angular contact bearing size how to measure and install
Take a single set of angular contact ball bearings as an example;
Diameter and diameter of the measured method with a single deep groove
ball bearings, angular contact deep groove ball bearing width is called
assembly high;
AC
contact type: the big end as the base, the preload on the outer ring on
the big face, the actual force is in the other side of the inner ring;
the other hand, the big end as a benchmark, the role of preload in the
inner ring The other end face, the actual force is in the outer ring of the big face.
BM contact type: similar to the above situation.
Angular contact ball bearing characteristics and uses:
Angular contact ball bearing limit speed is high, can
simultaneously bear the radial load and axial load, can also bear the
pure axial load, the axial load capacity determined by the contact
angle, and with the increase in contact angle increases.
Single
row angular contact ball bearings can only bear the axial load in one
direction, bear radial load, will cause additional axial force, must be
applied to the corresponding reverse load, so the bearings are generally
used in pairs. Double row angular contact ball bearings can withstand a large
radial load-based radial, axial two-way joint load and torque load, it
can limit the axial or shell axial displacement, contact angle of 30
degrees.
Pairwise
mounted angular contact ball bearings can withstand radial load-based
radial, axial bi-directional combined load, can also withstand pure
radial load. Series
configurations can only withstand axial loads in a single direction,
and the other two configurations can withstand axial loads in either
direction. This
type of bearing is generally made by the manufacturer of the
combination of pairs of submitted users, after the installation of
pre-pressure interference, rings and steel ball in the axial preload
state, thus increasing the entire group of bearings as a single support
stiffness and rotation Accuracy.
Specific classification and model control:
1, a = 15o angular contact ball bearings (70000 C type)
2, a = 25o angular contact ball bearings (70000 AC type)
3, a = 40o angular contact ball bearings (70000 B type)
4, a = 15o high-speed sealed angular contact ball bearings (B70000 C-2RZ type)
5, a = 25o high-speed sealed angular contact ball bearings (B70000 AC-2RZ type)
6, a = 15o high-speed sealing angle contact ceramic ball bearings (B70000 C-2RZ / HQ1 type)
7, a = 25o high-speed sealing angle contact ceramic ball bearings (B70000 AC-2RZ / HQ1 type)
8, back to back pairs of pairs of angular contact ball bearings [70000 C (AC, B) / DB type]
9, face-to-face pairs of double angular contact ball bearings [70000 C (AC, B) / DF type]
10, series pairs of double angular contact ball bearings [70000 C (AC, B) / DT type]
11, with the ball gap of the double row angular contact ball bearings (0000 type a = 30o)
12, no ball gap of the double row angular contact ball bearings (0000 A type a = 30o)
13, side with a dust cover double row angular contact ball bearings (0000 A-Z type a = 30o)
14, double-sided with a dust cover double row angular contact ball bearings (0000 A-2Z type a = 30o)
15, side with a ring of double row angular contact ball bearings (0000 A-RZ type a = 30o)
16, double-sided with a ring on the double row angular contact ball bearings (0000 A-2RZ type a = 30o)
17, four-point contact ball bearings (QJ type a = 35o)
In
order to increase or balance the bearing force, according to the
direction of the axial force, you can choose DB back to back
installation, DF face to face installation, DT series installation, for
the machine tool spindle, commonly used to triple installation,
quadruple installation, even There
are five installs, usually, the axial load is two-way, there is little
pure one-way axial load, so angular contact ball bearings are installed
in pairs. Pairwise
installation on the one hand can increase the radial load capacity, on
the other hand can also be more targeted to provide bearing capacity,
increase the toughness of the spindle.
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