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Linear bearing features
Source: China Bearing Network Time: 2018-01-18
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Linear bearings are widely used in electronic equipment; tensile testing machines and digital three-dimensional coordinate measuring equipment; and multi-axis machine tools, punching machines, machine grinders, active gas cutting machines, printers, card sorters, food packaging machines and other industrial machinery sliding component.
Smooth and smooth grease smooth linear bearing written inside the anti-corrosion oil; if the grease is smooth; first use fire oil or organic solvent to remove the anti-corrosion oil; air dry and then add smooth grease.
It is advocated to use a lithium soap smooth grease with a tack mark of N0.
If the oil is smooth, if it is smooth with oil, it is not necessary to remove the anti-corrosion oil. According to the temperature change, the smooth oil with ISO viscosity grade VG15-100 can be selected.
The shaft can be smoothed from the oil supply pipe or from the oil hole on the outer bearing seat. Because the sealing ring will scrape off the smooth oil; the oil is smooth and not suitable for non-porous bearing with sealing ring.
Friction coefficient The coefficient of motion friction coefficient is 0. 001-0. 004. Because the energy loss caused by friction is small. The movement speed is less than 60m/min; the temperature influence can be neglected. The friction force can be obtained by the following equation:
F=ц. 0鸓+fs
F: friction force (N). Good rickety risk P: external load (N) ц: friction coefficient device cooperation gap advocates cooperation with the inner bore of the bearing seat and the diameter of the optical axis.
Generally; bearings can not be preloaded; but high precision, light preload can be added to the bearing; however; negative diameter public service should not exceed the data in the table.
Bearing housing and shaft and bearing cooperation clearance.
Bearing box device standard type of snap ring and fixed plate device bearing box several ways.
Bearings with set screw devices will cause deformation of the bearing casing; should be prevented as much as possible.
Flange type flange type linear bearing; the precision of the inner hole of the bearing housing cooperated with it must be accurate.
Adjustable type (small opening type)
The opening on the bearing and the bearing housing is straight; a uniform preload in the circumferential direction can be obtained.
Large opening type can be used in cooperation with suitable bearing housings; large opening bearings can also be used for gap adjustment; even light preload can be added.
Precautions when installing the linear bearing into the bearing housing; use auxiliary work; prevent direct tapping of the end face or seal ring; use the bearing evenly; use the buffer plate; insert the optical axis by gently tapping Linear bearing; the shaft and the centerline of the bearing must be in line. If the shaft is twisted, the ball may fall; or the cage may be deformed; and the linear bearing may be damaged. The applied load should be evenly distributed over the entire bearing; especially When accepting 霎 load; two or more bearings should be used. Linear bearings do not accept rotating loads; otherwise they can cause accidents.
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