Product Description:
Metal Linear Bearing is a linear motion system produced at low cost for unlimited travel in conjunction with cylindrical shafts. Widely used in precision machine tools, textile machinery, food packaging machinery, printing machinery and other industrial machinery sliding parts.
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Name
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linear bearings
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Type
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standard, clearance-adjusted linear bearings
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Specification
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travel in an infinite straight line
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Function
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used in electronic equipment, food machinery
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Brief introduction
Linear bearings are a linear motion system for use with cylindrical shafts with linear travel. Due to the bearing ball and bearing jacket point contact, steel ball rolling with minimum friction resistance, so the linear bearing has a small friction, and more stable, does not change with the bearing speed, can get high sensitivity, high precision smooth linear motion. Linear bearing consumption also has its limitations, the most important is bearing impact load capacity is poor, and bearing capacity is also poor, followed by linear bearings in high-speed movement vibration and noise. Linear bearing automation selection has included. Linear bearings are widely used in precision machine tools, textile machinery, food packaging machinery, printing machinery and other industrial machinery sliding components
As the bearing ball and bearing point contact, so the use of small load. The steel ball rotates with very little friction resistance, so that a smooth movement with high precision can be obtained.
Plastic linear bearing is a kind of self-lubricating characteristics of linear motion system, the biggest difference between it and metal linear bearing is that metal linear bearing is rolling friction, bearing and cylindrical shaft is point contact, so this kind is suitable for low load high-speed movement; and plastic linear bearing is sliding friction, bearing and cylindrical shaft is surface contact, so this kind is suitable for high load medium and low-speed movement.
Characteristic
Linear bearings are used in conjunction with hardened linear drive shafts. System for infinite linear motion. Load ball and quenched drive shaft because it is point contact, the allowable load is small, but when linear motion, the frictional resistance is minimum, high precision, fast movement.
Selected Common Linear Bearings
Plastic linear bearings bearings with shaft has no special requirements; can withstand greater load than metal bearings, but due to the movement between the bearing and the shaft is sliding friction, so the plastic linear bearings movement speed is subject to certain restrictions; movement resistance to be greater than the metal linear bearings; but the movement noise is lower than the metal linear bearings, especially in the middle and high speed, plastic linear bearings noise with the speed of the impact of the very small. The noise of plastic linear bearing is lower than that of metal linear bearing. Plastic linear bearings due to its internal design with chip removal groove, so allow the use of dusty occasions, dust in the movement process automatically from the chip removal groove out of the friction surface of the bearing body; Plastic linear bearings also allow the use of the process of cleaning, made of special materials, the internal sliding film can even be used for a long time for the operation of the liquid.
Classification
(1)Standard, clearance adjustment linear bearings, open-ended linear bearings, extended linear bearings, general-purpose linear bearings
(2) flange type linear bearings can be divided into: round flange type, method of flange type, elliptic flange type, guided round flange type, guided method of flange type, guided elliptic flange type, extended round flange type.
According to the specification system.
Divided into two series, i.e. LM and LME series. The LM series is used in Asia, Southeast Asian countries, Japan, Korea, China and so on. Metric dimensions as a standard, with the general tolerance of the outer diameter of the linear shaft is h7. LME series are mostly used in Europe, the United States, Germany, Italy and other regions. Inch size as the standard, there are also metric size, with the tolerance of the outer diameter of the linear shaft is generally g6. two series of structural characteristics, in addition to the different size, different tolerance of the hole, the structure is generally the same.
According to the shape.
1:Straight cylinder type (shape such as a cylinder, generally installed with a spring, for the installation of small size occasions)
2: flange type (end or middle of the mounting flange, can be installed with screws, flange is generally divided into round, square and cut edge type three)
3: open type (shaped like a straight cylinder, the appearance of the axial slit, for the need to adjust the gap occasions, divided into two kinds of large openings and small openings).
According to the performance points.
1:Ordinary type (general performance requirements of the use)
2:Super type (long life and large load performance needs of the occasion)
Application
Linear bearings are more and more widely used in electronic equipment, food machinery, packaging machinery, medical machinery, printing machinery, textile machinery, machinery, instruments, robots, tooling machinery, CNC machine tools, automotive and digital three-dimensional coordinate measuring equipment and other precision equipment or special machinery industry.
Clearance
Linear bearings adjustable, open type bearings inside and outside diameter measured before the cut, after the cut there will be some elastic deformation, with the clearance should be mounted in the bearing housing to measure (steel keeper bearings, KH bearings similar situation). Adjustable clearance bearing housing adjustment direction should be perpendicular to the direction of the bearing cut to ensure uniform clearance, linear bearing structure characteristics can not be rotary motion, while requiring good guiding, so linear bearings are generally two shafts + four sets of bearings or two shafts + two sets of elongated bearings for a combination of two shafts to be mounted straight, the whole combination of assembled, push and pull must be flexible and no blocking before installation of transmission The transmission power should be enough to overcome the bearing friction resistance, the linear bearing friction resistance is approximated as one thousandth of the working load.
Maintenance
Metal linear bearing maintenance: lubrication and friction: linear bearing internal injection of anti-corrosion oil, if grease lubrication, the first paraffin or organic solvents to remove the anti-corrosion oil, air-dry and then add grease. (It is recommended to use the lithium soap grease with the viscosity mark of N0.2.) In case of oil lubrication, it is not necessary to remove the anti-corrosion oil, and lubricating oil of ISO viscosity grade VG15-100 can be used according to the temperature change. Shaft lubrication can be supplied from the oil supply pipe or from the oil hole on the outer bearing housing. Oil lubrication is not suitable for bearings without holes with seals because the seals will scrape off the lubricant.
Plastic linear bearing maintenance: because of the plastic linear bearing inside the sliding film is made of self-lubricating plastic, so its use in the process of no additional oil supply and maintenance; and because of the plastic linear bearing with chip removal slot, so even if the bearings or shafts crowded with dust also do not need to go to the maintenance, dust will be automatically in the process of the movement from the chip removal slot out; only when the sliding film wear and loss of efficiency directly after the use of replacement of the internal sliding film; maintenance can be used. Sliding film can be replaced directly after the wear and tear of the sliding film; maintenance is very convenient.
Disposal
(1) Linear motion bearing series may lead to the entry of foreign objects or adversely affect the assembly precision of each part after disassembling each part, please do not disassemble.
(2) Dropping or knocking of the linear bushing may cause breakage. When the product is subjected to impact, the function may be damaged even if the damage is not visible from the outside.
Please note that when the product is subjected to impact, even if the damage does not appear on the outside, the function may still be damaged.
Lubrication
(1) Wipe off the anti-rust oil carefully and seal in the lubricant before use.
(2) Avoid mixing lubricants with different properties.
Linear guide bearings
A groove or ridge made of metal or other material that bears, holds, guides, and reduces the friction of a moving device or equipment.
Longitudinal grooves or ridges on the surface of the guideway are used to guide and fix machine parts, specialised equipment and instruments. Guide in our daily life application is also very common, such as sliding door sliding bad, train tracks and so on are the specific application of the guide.
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