Linear motion ball bearings in its structure is there to maintain the contents of the outer ring, is equipped with more than maintain the ball and make unlimited campaign cycle. The two sides remain within a fixed spring Dang Quan, in the work force of the ball straight to the track with the gap window. This is part of the load for the ball rolling contact with the shaft. With a very low coefficient of friction relative movement, linear motion ball bearings for machinery and equipment, automation equipment, energy-saving equipment such as the most suitable choice of the bearings.
Linear motion bearings, is being increasingly Ball Bearings
Roller Bearings
Deep Groove Ball Bearing widely used in electronics, machinery, equipment, robotics, tools, machinery, food machinery, packaging machinery, medical machinery, printing machinery, textile machinery, numerical control machine tools, automobile, and other general or special machinery industry Way.
The use of linear motion ball bearings advantages:
1. As mobile contact resistance and friction will start moving friction resistance to the minimum, it can save energy, easy access to high speed.
2. The load increased, but not sensitive to changes in coefficient of friction, heavy-duty, the coefficient of friction between the minimum and maintain the accuracy of long-term change, in the long-term mechanical life.
3. Linear motion bearings interchangeability, and the installation of easy-to-use, and mechanical structure new, small, in light of the characteristics.
4. To save oil procedures, to simplify the lubrication and maintenance purposes.
5. Surcharge on both sides of the oil seal bearing dust and also to more easily penetrated or foreign body in place.
Linear motion ball bearings classification:
Standard use of the most extensive series of three different sizes Series:
LM Series: Metric size series (with Southeast Asian countries); LME Series: Metric size series (the United States.) l adapt to micro-light, thin, short, the times demand of the series, ultra-small diameter size, a diameter: 3,4, 5MM. l outer ring of stainless steel, steel balls at both ends of blocks are stainless steel, used for plastic manufacturers to maintain.
S, SL…… UU l open with a ball, and the corresponding outer ring, will be highly rigid and to prevent warping the shaft guide, available at the same time gap adjustable, with no loosening state.
LM…… OP LME…… OP l-gap adjustment on the outer ring along the axial length slit open a single type, to adjust the fixed bearing shell to meet, without loosening state.
LM…… ADJ LME…… ADJ l of oil seal-bearing single-ended or Labiatae ends with a special synthetic rubber ring, suitable for dust and more dust and debris sites, and to maintain good lubricants do not leak.

1. Improve the accuracy of the bearings in the host After installation, such as measuring the radial beating spindle can be found each to the value of a certain measuring the change in consecutive measurements, to be found after a certain number, this Changes will be approximately repeated. This measure changes in levels of indicators for the cycle of rotation accuracy, the repetition of similar changes in the number of representatives to the cycle of rotation accuracy of the "quasi-cycle", the quasi-periodic changes in the amplitude of the money, is the cycle of rotation accuracy poor . If the spindle be appropriate to pre-load, speed will be gradually increased to nearly speed work to implement bearing the "running-in" role, can increase the cycle of rotating spindle accuracy. 2. Bearing improve the accuracy of a way to a factory Preparation precision instruments, with spindle 6202 / P2-bearing and its accuracy can not meet the requirements, after the Journal and bold in its production on the roller to replace the Inner Ring Road and steel Measurement of a glutinous balls, each the size of a three groups, each ball from close to 120 ° intervals separately, as a re-processing to reduce the surface, a weight reduction with the surface, but also enhance the axis of a bearing system Stiffness, and the three largest and the smallest of the three ball nearly equidistant distribution, and improve the accuracy of the axis of rotation, and therefore meet the requirements of precision equipment. 3. Installation of a comprehensive check the accuracy of angular contact ball bearings will be installed after the main shaft, the installation check the accuracy of the order as follows (in the 60-100 mm shaft for ordinary lathe as an example): (1) measuring shaft and bearing holes The size, to determine with precision bearings, with the following: the inner ring and the shaft to fit, a surplus of 0 ~ +4 μ m (at light load, high-precision, 0); outer ring and bearing holes to space With gaps of 0 ~ +6 μ m (but bearing in the free end of the use of angular contact ball bearings, the gap can be increased); axis and the surface at a round hole error in the following 2 μ m, the bearings used in the ring at the end of the parallel 2 μ m Following a shaft shoulder in the face of external face of the beating in 2 μ m below housings shoulder-block in the axis of beating 4 μ m below the front cover, spindle-beating in the face of the axis 4 μ m below. (2) fixed before the end of the bearings in the shaft bearings will be installed with a clean wash kerosene for thorough cleansing, fat lubrication, first to contain three percent to five percent of the grease into organic solvents for degreasing cleaning bearings, and then oil Quantitative the grease gun will fill bearings (bearings of the space volume of 10% to 15%); heating bearings to heat up 20 ~ 30 ℃, oil presses will be installed shaft bearings; will be tight sets in the shaft and pressure Suitable withstood the pressure to end its axial bearing positioning will spring balance in the volume of scallops bearing on the outer ring, started by measuring the torque under the method of checking whether there is a significant pre-load the change (even if the bearing is correct, However, due to meet or deformation of the cage, pre-load may also change). (3) bearings - shaft assembly into Block, Block-heating-warming to 20 ~ 30 ℃, with the continuous pressure bearing Qinghuan - shaft assembly into blocks hole, adjusting the front cover so that the front cover for the retention of 0.02 ~ 0.05μ m, to end housings, as the base, Qian Fenbiao the first conflict in the Journal table on the surface, measuring its rotation axis jumps to error in 10 μ m below will Qian Fenbiao positioning in the axis, the Table Inconsistent with the first hole on the back seat, to measure the rotating bearing blocks around the hole coaxial. (4) free-bearing may be offset by selective bias on the location of the installation to support housings after position, offset by as much as possible between the roundness deviation and coaxial deviation. 4. Cone-short double row of cylindrical roller bearings installed in the installation NN3000K series of short conical hole double row cylindrical roller bearings, we must pay attention to the shaft bearings and taper diameter of the right anastomosis, in the case of low production available Tu - Validation of contact, but in larger production quantities, it is best to taper gauge the precise calibration. Bearing in will be installed on the cone axis, the inner ring along the axis should be transferred to the appropriate location to radial clearance close to zero.

Within. Put into operation after power has been 1.5 years, the indicators were normal and correct description of the technology programme. 6-benefit analysis of main fracture after the replacement of the original manufacturers need, together with the original model main rotor shipped to manufacturers, including transportation costs, each axis of funds to be 150,000 yuan. In local processing repair, and each axis actual costs only 0.75 million (of which: material costs 300 yuan, 03,500 yuan processing fees, transportation costs such as installation of 03,700 yuan), each axis save money 142,500 yuan. Meanwhile, due to savings in maintenance time, ahead of power generation, power generation has increased revenue and reduce the losses. The station on the 1st generators for the main fracture time on March 15, 2002, the start Chunguan incidents, such as the replacement of the original models spindle manufacturers, construction period of at least two months. In the local processing, construction period 10 d, reduce the period 50 d, that is, ahead of 50 d power generation, the daily power generation 12,000 kwh, an increase generating capacity of 600,000 kwh, according to 0.32 yuan / kWh, generating income of 192,000 yuan to increase. The two together a cost-effective 331,500 yuan, and efficiency is very impressive. 7 conclusion of the station ZD661-LH-120 turbine group as a whole spindle fracture repair technology programme, focusing on the master spindle welding and cutting in the process of Care, a straight line, surface roughness rate. Turning boring machine used to address the large-diameter bulky items in the five conditions for the use of local lathe turning the issue. The programme of low investment, short construction period, simple, reliable technology, is to solve power plant turbine generator and main spindle fracture of the effective ways.