The choice of the Spherical roller bearings grease:

Load < 1 mpa, Spherical roller bearings shaft neck circumference speed below 1 m/s, the highest working temperature 75 ℃, choose 3 calcium base grease;

1-6.5 MPa, load speed shaft neck circumference of 0.5 5 m/s, the highest working temperature of 55 ℃, choose 2 calcium base grease;

Load > 6.5 MPa, Series radial ball bearings under the shaft neck circumference speed 0.5 m/s, the highest working temperature 75 ℃, choose 3 calcium base grease;

Load < 6.5 MPa, shaft neck circumference of 0.5 5 m/s speed, the highest working temperature 120 ℃, choose 2 lithium base grease;

Load > 6.5 MPa, under the shaft neck circumference speed 0.5 m/s, the highest working temperature 110 ℃, choose no. 2 - sodium calcium base grease;

Load, 1-6.5 MPa shaft neck circumference speed below 1 m/s, the highest working temperature is 50-100 ℃, choose 2 lithium base grease;

Load > 5 mpa shaft neck circumference speed 0.5 m/s, the highest working temperature 60 ℃, choose 2 calender fat;

In damp environment, temperature under the condition of 75-120 ℃, should consider to use calcium - sodium based grease grease. In damp environment, working temperature below 75 ℃, no 3 calcium base grease, can also be used aluminum base grease. Working temperature at 110-120 ℃, can use lithium base grease or barium base grease. Centralized lubrication, consistency to small.

The Deep groove ball bearing lubrication

Deep groove ball bearing is lubricated by grease to, when choosing grease should consider the following points:

(1) the bearing load, low speed, small grease should choose cone into the degree, on the other hand to choose large cone into the degrees. High-speed bearing Excavator Slewing Bearing

Sliding bearing

Use smaller cone into the degree, good mechanical stability of grease. Pay special attention to the lower the viscosity of base oil of the grease.

(2) the choice of grease drop point generally higher than the working temperature of 20-30 ℃, under the condition of high temperature continuous operation, be careful not to exceed the allowed to use the temperature range of the grease.

(3) sliding bearing in water or damp environment, should choose water resistance good calcium, aluminum or lithium base grease.

(4) has a good adhesion of grease.

The attention of the slim ball bearing problem

slim ball bearing is surface contact, so want to maintain a certain amount of oil film between contact surfaces, so the design should pay attention to the following questions:

1, to the oil film can be smoothly into the friction surface.

2, the oil from the reali slim bearings surface area into the bearing.

3, don't make the whole ring groove in the middle of the bearing.

4, such as oil, juncture place oil groove.

5, to make the oil ring oil fully reliable.

6 don't stuck, gas hole.

7, don't form the oil flow area.

8, prevent to cut off the oil film of sharp edges and sharp edges.

The method of making the mobile crane bearing

Domestic repair welding is commonly used for mobile crane bearing wear, bushings, pitting and other methods, but when the shaft is made of 45 # steel, quenched and tempered treatment, if only by surfacing welding processing, precision spindle bearings can produce welding stress, in the case of heavy load and high speed, can appear the phenomenon of crack and fracture at shoulder, if use the stress relieving, is difficult to operate, and the processing cycle is long, the high cost of maintenance; When the material of shaft for HT200, adopts the cast iron welding is not ideal. Some companies will use a brush plating with higher maintenance technology, laser welding, micro arc cold welding, etc., even the maintenance technology often require high requirement and high fees.

For the above repair technology, enterprises have less common in Europe and the United States, Japan and South Korea, the developed countries generally USES a high polymer composite material technology and nanometer technology, polymer technology can site operation, effectively improve the maintenance efficiency, and reduces the maintenance cost and maintenance intensity.

Single row crossed roller slewing bearing products classification

There are many kinds of Single row crossed roller slewing bearing. (1) can be divided by can withstand the load in the direction of the radial (centripetal) Series radial ball bearings and thrust (axial) sliding bearing.

(2) according to the types of lubricant grease can be divided into oil lubricated bearing, bearing, water lubricated bearing, gas bearings, solid lubrication bearings, magnetic bearings and magnetic bearing seven classes.

(3) according to the lubrication film thickness can be divided into thin film lubrication bearing and thick film lubrication bearing two categories.

(4) according to the bearing shell material can be divided into bronze bearings, bearings, plastic bearings, cast iron jewel bearing, powder metallurgy bearings, self-lubricating bearing, oil bearing, etc.

5. According to the bearing shell structure can be divided into round, elliptical bearing, bearing the three oil bearing, stepped surface bearing, tilting tile bearing and foil bearing, etc.

Precision spindle bearings

Miniature ball bearing with a wide range of uses.Suitable for high speed bearing rotational friction torque, low vibration, low noise, low requirements of the product.
Products characteristics in super small aperture of micro Thin section bearings in the, diameter φ 2mm following of micro bearing has metric 68, and 69, and 60 series total 18 species, inch r series total 6 species, this based shàng, also can is divided into ZZ plate bearing dust cover series, and RS rubber bearing sealed circle series, and special rich Dragon bearing sealed circle series, and flange series, and stainless steel series, and ceramic ball series,.Micro-bearings are suitable for all kinds of industrial equipment, small rotary motors, etc;Recently, the device of micro-miniaturization, light weight, thin demand has increased.Main applications office equipment motor, soft pressure rotor drive.Dental drill, drive motor.Stepper motors, video recorders, magnetic drum.precision spindle bearings Toy models of computer fan, encoder

Miniature bearing representative products for household appliances

Household miniature bearing ( miniature linear bearings ) on behalf of the product is cleaner and the air conditioner motor bearing, mainly motor 22mm diameter. Characteristics of vacuum cleaner motor speed is up to 4-5 million to /min,conical bearing , motor and 100，000 rpm /min have also been used as cleaner mass market sales.

  The air conditioner is long in the indoor use of equipment, have a high demand for low noise. Present problem is, electric corrosion electricity causes between the inner and outer slewing ring bearings , the solution is to use non conducting ceramic ball, from a technical level and will enhance the appliances used in miniature bearings.