Linear bearing

Linear bearing is a linear motion system for linear travel with the cylinder axis. Since carrying the ball point contact with the bearing housing, the ball rolling with a minimum of friction, and therefore has a small friction linear bearings, and relatively stable, with the bearing speed change, can achieve high sensitivity, high accuracy smooth linear motion. Linear bearings consumption also has its limitations, the most important is the impact of poor load bearing capacity, and the carrying capacity is also poor, followed by linear bearings in large high-speed motion vibration and noise. Linear bearings quick and easy selection have included gifted automation. Linear bearings are widely applied to the sliding parts precision machine tools, textile machinery, food packaging machinery, printing machinery and other industrial machinery. Since carrying the ball in contact with the bearing point, so the use of small loads. Minimal friction ball rotation, which can get high-precision smooth movement.

High speed bearings

Bearing high-speed, medium-speed and low-speed but not with the speed given to a given line speed, large bearing hundreds turn even high speed bearings. Where high-speed bearings claim bearing swivel system through precise balancing shaft and the bearing seat hole installation site should have a higher than normal requirements for dimensional accuracy and shape accuracy, NACHI bearing especially concentricity and stop shoulder on the housing bore or shaft neck vertical, and in consideration of these problems, the same factors must be noted that the high-speed and high-temperature operation is bearing factor.

Miniature ball bearings Instructions

Miniature ball bearings Instructions:
1, open-bearing means bearing with no closures of.
2, closed on both sides of the bearing means bearing with closures or closures, ZZ said both sides with a metal lid, 2RS said both sides with closures, customers can choose different closures or closures according to their own requirements.
3, the same size bearings, customers can choose different materials, grades. Materials were: bearing steel, carbon steel, stainless steel and plastics.
4, the following dimensions according to international standards, the basic dimensions of the bearing, as customers have different requirements, we can customize.
5, the same bearing a variety of different symbols and called, make sure their needs bearing size

The limit of the thin wall bearings contact Angle

The limit of the thin wall bearings contact Angle is 120 °. When the sliding bearing wear and tear to the contact Angle, fluid lubrication will be destroyed. So don't affect the sliding bearing compressive conditions under the premise of the smaller the contact Angle is better. From the theoretical analysis of the friction torque, when the contact Angle is 60 °, minimum friction torque, so, the speed is higher than 500 r/min of miniature linear bearings, contact Angle 60 °, speed is less than 500 r/min of sliding bearing, contact Angle can be used in a 90 °, 60 ° is used.

Shaft neck and the actual situation of the sliding bearing surface contact, available per unit area of the actual contact points. The more contact, more and more even, said sliding bearing scraping the research better, on the other hand, sliding bearing scraping the inquiry is not good. In general the more the more close contact point, research difficulty is large. Production should be based on the performance of the sliding bearing and working conditions to determine the contact point

The linear plain bearings grease lubrication cycle:

By accident, linear plain bearings not important parts: shaft speed < 200 r/min, the lubrication cycle 5 days; Shaft speed > 200 r/min, the lubrication cycle 3 days.

Continuous work: shaft speed < 200 r/min, the lubrication cycle 2 days; Shaft speed > 200 r/min, the lubrication cycle 1 days.

Continuous work, operating temperature less than 40 ℃ : shaft speed < 200 r/min, the lubrication cycle 1 days; Shaft speed > 200 r/min, the lubrication cycle once per class.

Continuous work, operating temperature 40-100 ℃ : shaft speed < 200 r/min, the lubrication cycle per shift once; Shaft speed > 200 r/min, the lubrication cycle every second.

The journal as uniform close contact with mobile crane bearing, and must fit clearance.

Refers to the journal and sliding bearing contact area of the central Angle. Contact Angle is not too big nor too small. Contact Angle is too small will make sliding bearing pressure increases, serious when they make the sliding bearing produces large deformation, accelerate wear, shorten service life. Contact Angle is too big, can affect the formation of oil film, can't get good fluid lubrication.

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.