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Linear bearing linear motion system is a low-cost production, used with a cylindrical shaft for unlimited trips. Because of bearing balls and axis point contact, so the use of load smaller. With minimum frictional resistance of rotating steel balls, which can smooth movement with high precision.
Linear bearings are widely used in electronic equipment, tensile testing machine and digital three dimensional coordinate measurement devices and other precision equipment, and multiaxial machine, punching machine, tool and Cutter Grinder, automatic gas cutting machine, printers, card-sorting machine, food packaging and other industrial machinery of the sliding parts.
. Lubrication and friction
. Grease lubrication
Linear bushing into corrosion-resistant oil, if used for grease lubrication, the first organic Rong JI clear kerosene or corrosion-resistant oil, air dry and then add grease.
Recommended viscosity labeled N0.2 lithium SOAP grease.
. Oil lubrication
If using oil lubrication, do not have to clear the corrosion-resistant oil, optional ISO viscosity grade according to temperature changes of VG15-100 lubricants.
Axis lubrication from the feed line to no, or oil from the oil holes on the outer housing. As the seals will be scraped away lubricants, oil lubrication does not apply to non-porous bearings with seals.
. Coefficient of friction
From Figure 5, movement range of 0.001-0.004 friction coefficient. Energy losses due to friction is small. When the velocity is less than 60M/min, and temperature effects can be ignored. Friction force can be derived from the following equation:
F=ц.•P+fs
F: frictional force (n) *: seal resistance (2~5N)
P: external loads (n) ц: friction coefficient
. Installation
. Clearance
Recommendations and bearing bore and shaft diameter using the fit tolerance.
In General, bearings cannot preload increases, high precision, light preload can be added on to the bearing, however, should not exceed the diameter tolerance of table data.
Housing and shaft and bearing clearance.
Installation of bearing box
.-Standard
With a clasp and a fixed plate bearing box in several ways.
Coat with set screws to install the bearing can cause bearing variants, should be avoided.
.-Flange
When you install the flanged type linear bushing, with holes in the bearing box of surface with precision accuracy.
. Adjustable type (small opening)
Openings perpendicular on the bearings and the bearing box, you get the circumference evenly preload.
.-Large opening
If used in conjunction with suitable housing and large hatch bearing clearance adjustment can be made, or even extra light preload.
. Installation considerations
When mounted linear bearing housings, you should use the secondary work, avoid direct hit end or seals, bearing uniform import should be used, bumper, by gently tapping into
Optical axis into the linear bearings, centre line of shaft and housing must be in a straight line. Tilting Arbor table insert, ball may fall off or cause cage variants, while damage to linear bearings
Plus loads should be equally distributed over the entire bearing, especially when subjected to an instantaneous load, you should use two or more bearings. Linear bearings are not subjected to rotating loads, failure can result in accidents.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NN3024MBKRCC1P4 NSK | 120 | 180 | 46 |
| NN3022TBKRCC1P4 NSK | 110 | 170 | 45 |