German Werthenbach bearings, Werthenbach models, Werthenbach prices

Werthenbach bearings are precision mechanical components that convert sliding friction between the rotating shaft and the bearing housing into rolling friction, thereby reducing frictional losses. Rolling bearings generally consist of four parts: inner ring, outer ring, rolling elements, and cage. The inner ring fits with the shaft and rotates with it; the outer ring fits with the bearing housing and provides support; the rolling elements are evenly distributed between the inner and outer rings by the cage, and their shape, size, and quantity directly affect the performance and service life of the rolling bearing; the cage ensures even distribution of the rolling elements, guides their rotation, and facilitates lubrication.

Werthenbach bearing classification

There are many types of plain bearings: 1) Classified by load direction, they can be divided into radial plain bearings and thrust (axial) plain bearings. 2) Classified by lubricant type, they can be divided into oil-lubricated bearings, grease-lubricated bearings, water-lubricated bearings, gas bearings, solid-lubricated bearings, magnetic fluid bearings, and electromagnetic bearings, totaling 7 categories. 3) Classified by lubricant film thickness, they can be divided into thin-film lubricated bearings and thick-film lubricated bearings. 4) Classified by bearing shell material, they include bronze bearings, cast iron bearings, plastic bearings, jewel bearings, powder metallurgy bearings, self-lubricating bearings, and oil-impregnated bearings. 5) Classified by bearing shell structure, they include cylindrical bearings, elliptical bearings, three-lobe bearings, step-face bearings, tilting-pad bearings, and foil bearings. Bearing shells are divided into split and integral structures. To improve the friction properties of the bearing shell surface, one or two layers of anti-friction material are often cast on the inner diameter surface, commonly known as bearing lining; thus, there are bimetallic and trimetallic bearing shells. The bearing shell or lining is an important component of plain bearings, and the materials for both are collectively referred to as bearing materials. Since the bearing shell or lining is in direct contact with the journal, and the journal is generally more wear-resistant, the primary failure mode of the bearing shell is wear. Wear of the bearing shell is directly related to the journal material, the shell material itself, the lubricant, and the lubrication state. These factors should be comprehensively considered when selecting bearing shell materials to enhance the service life and performance of plain bearings.

Werthenbach bearing grease selection

1) For bearings with heavy loads and low speeds, select grease with low penetration; conversely, select grease with high penetration. For high-speed bearings, select grease with lower penetration and good mechanical stability. Note that the viscosity of the base oil in the grease should be relatively low. 2) The dropping point of the selected grease should generally be 20-30℃ higher than the operating temperature. In cases of continuous high-temperature operation, ensure the temperature does not exceed the allowable usage range of the grease. 3) When plain bearings operate in water-sprayed or humid environments, select calcium-based, aluminum-based, or lithium-based greases with good water resistance. 4) Select grease with good adhesion. Selection of grease for plain bearings: Load<1MPa, journal circumferential speed below 1m/s, maximum operating temperature 75℃, select No. 3 calcium-based grease; load 1-6.5MPa, journal circumferential speed 0.5-5m/s, maximum operating temperature 55℃, select No. 2 calcium-based grease; load >6.5MPa, journal circumferential speed below 0.5m/s, maximum operating temperature 75℃, select No. 3 calcium-based grease; load<6.5MPa, journal circumferential speed 0.5-5m/s, maximum operating temperature 120℃, select No. 2 lithium-based grease; load >6.5MPa, journal circumferential speed below 0.5m/s, maximum operating temperature 110℃, select No. 2 calcium-sodium based grease; load 1-6.5MPa, journal circumferential speed below 1m/s, maximum operating temperature 50-100℃, select No. 2 lithium-based grease; load >5MPa, journal circumferential speed 0.5m/s, maximum operating temperature 60℃, select No. 2 calendering grease; in humid environments, at temperatures of 75-120℃, consider using calcium-sodium based grease. In humid environments, if the operating temperature is below 75℃ and No. 3 calcium-based grease is unavailable, aluminum-based grease may be used. At operating temperatures of 110-120℃, lithium-based or barium-based grease may be used. For centralized lubrication, use grease with lower consistency. Lubrication cycle for plain bearing grease: Occasional operation, non-critical parts: Shaft speed<200r/min, lubrication cycle once every 5 days; shaft speed >200r/min, lubrication cycle once every 3 days. Intermittent operation: Shaft speed<200r/min, lubrication cycle once every 2 days; shaft speed >200r/min, lubrication cycle once every 1 days. Continuous operation, operating temperature less than 40℃: Shaft speed<200r/min, lubrication interval once every 1 days; shaft speed >200r/min, lubrication interval once per shift. Continuous operation, operating temperature 40-100℃: shaft speed<200r/min, lubrication cycle once per shift; shaft speed >200r/min, lubrication cycle twice per shift. It is necessary to ensure uniform and close contact between the journal and the plain bearing, while maintaining a certain clearance fit. This refers to the central angle subtended by the contact surface between the journal and the plain bearing. The contact angle should neither be too large nor too small. A contact angle that is too small increases the pressure on the plain bearing, potentially causing significant deformation, accelerating wear, and shortening service life; a contact angle that is too large affects oil film formation, preventing effective hydrodynamic lubrication. Experimental studies indicate that the limit for the plain bearing contact angle is 120°. When the plain bearing wears to this contact angle, hydrodynamic lubrication fails. Therefore, under conditions that do not compromise the compressive strength of the plain bearing, a smaller contact angle is preferable. Theoretical analysis of friction torque shows that the friction torque is minimized when the contact angle is 60°. Therefore, it is recommended that for plain bearings with speeds above 500r/min, the contact angle should be 60°; for plain bearings with speeds below 500r/min, the contact angle can be 90° or 60°.

Werthenbach bearing usage precautions

Plain bearings involve surface contact, so a certain oil film must be maintained between the contact surfaces. Therefore, the following issues should be noted during design: 1) Ensure the oil film can smoothly enter the friction surface. 2) Oil should enter the bearing from the non-load-bearing zone. 3) Do not place a full-circumference oil groove in the middle of the bearing. 4) For split bearings, cut oil grooves at the joints. 5) Ensure the oil ring provides sufficient and reliable lubrication. 6) Do not block the oil filling holes. 7) Avoid forming stagnant oil zones. 8) Prevent sharp edges and corners that could cut the oil film. Plain bearings can also be lubricated with grease. When selecting grease, consider the following points: 1) For bearings with heavy loads and low speeds, select grease with low penetration; conversely, select grease with high penetration. For high-speed bearings, select grease with lower penetration and good mechanical stability. Note that the viscosity of the base oil in the grease should be relatively low. 2) The dropping point of the selected grease should generally be 20-30℃ higher than the operating temperature. In cases of continuous high-temperature operation, ensure the temperature does not exceed the allowable usage range of the grease. 3) When plain bearings operate in water-sprayed or humid environments, select calcium-based, aluminum-based, or lithium-based greases with good water resistance. 4) Select grease with good adhesion.

Weidou Intelligent Technology specializes in selling German Werthenbach plain bearings, Werthenbach rolling bearings, Werthenbach spherical plain bearings, Werthenbach deep groove ball bearings, Werthenbach angular contact ball bearings, Werthenbach self-aligning ball bearings, Werthenbach thrust ball bearings, Werthenbach double-direction thrust angular contact ball bearings, Werthenbach combination bearings, Werthenbach thrust roller bearings, Werthenbach needle roller bearings, Werthenbach outer sphere ball bearings, Werthenbach self-aligning roller bearings, Werthenbach flanged bearings, Werthenbach linear bearings, all original imports from Germany. Welcome inquiries and orders from users.