Linear bearings are a linear motion system at low cost for use in infinite trip copper bushings and cylindrical shafts. Because the bearing ball and the shaft was in point contact, so the use of small load.
The ball is rotated with minimal friction and the smooth movement of the high precision bimetallic bearing is achieved. Linear
bearings are widely used in electronic equipment, tensile testing
machine and digital three-dimensional coordinate measuring equipment and
other fine equipment, as well as multi-axis machine tools, presses,
tool grinder, active gas cutting machine, printer, card sorting machine,
food packaging machine and other industrial machinery sliding part. The
Smooth
and friction. Grease smooth linear bearing inside to write a linear
bearing into the anti-corrosion oil, if the oil is smooth, the first
with oil or organic solution to eradicate the anti-corrosion oil, dry
and then increase the grease. It
is recommended to use lithium soap grease with a viscous mark of N0.2.
Smooth oil If the oil is smooth, do not remove the anti-corrosion oil,
according to the temperature change can choose ISO viscosity grade
VG15-100 smooth oil. Not supplied to the oil or oil from the oil hole on the outer housing. Because the ring will scrap off the smooth oil, oil is not suitable for non-porous with a ring bearing. Friction Coefficient Movement Friction Coefficient Scale 0.001-0.004. Because the energy loss caused by friction is very small. When the speed is less than 60 m / min, the temperature effect can be ignored. The
friction force can be obtained by the following equation: F = ц. · P +
fs F: friction (N) *: seal resistance (2 ~ 5N) P: outside load (N) ц:
friction coefficient. With the bearing bore and the optical axis of the use of the co-operation. In
general, the bearing can not be preloaded, but the high precision,
light preload can be added to the bearing, but the negative diameter of
the official service should not exceed the table data. The bearing housing and the shaft cooperate with the bearing clearance.
Bearing box.
Standard type with snap ring and fixed plate device bearing box of several methods. With the positioning screw device bearings will cause deformation of the bearing jacket, should be avoided.
Flange type flange type linear bearings, with the cooperation of the bearing box hole surface accuracy to be accurate.
Adjustable (small opening type) bearings and bearing openings on the
bearing straight, you can get evenly in the direction of the preload.
Large opening type If used in cooperation with the appropriate
bearing, large opening bearings can also be adjusted to the gap, and
even can be added light preload.
Precautions
When installing the linear bearing into the housing, use the auxiliary
work to prevent the direct impact of the end face or seal, should be
imported evenly with the bearing, with a buffer plate, by gently tapping
the optical axis into the Linear bearings must be shaft and bearing the centerline into a straight line. If
the shaft is skewed, the ball may fall, or the cage may be deformed,
and the damage to the linear bearing may be distributed evenly over the
entire bearing, especially when an instant load is applied, two or more Bearing. Linear bearings do not accept rotary loads, or can cause accidents.
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