How to check the installation accuracy of three-row cylindrical roller slewing rings?

Overview of Three Row Cylindrical Roller Slewing Bearing

Three Row Cylindrical Roller Slewing Bearing is a type of bearing used in heavy machinery, particularly in cranes, excavators, and other large rotating equipment. The design of this bearing incorporates three rows of cylindrical rollers, which enhances its load-carrying capacity and provides better stability.

Features of three-row cylindrical roller slewing rings

High bearing capacity: due to the presence of three rows of cylindrical rollers, and each row of rollers bears loads in different directions, the three-row cylindrical roller slewing ring can bear large axial force, radial force and overturning moment at the same time, and the bearing capacity is higher than that of other types of slewing rings.

Good rigidity: The structural design of the three-row cylindrical rollers makes it have high rigidity, which can effectively reduce the deformation of the slewing ring when bearing the load, ensure the slewing accuracy and stability of the equipment, and is especially suitable for large mechanical equipment with high precision requirements.

Smooth operation: the cylindrical roller and the raceway are in line contact, the contact area is large, and the rolling friction is small, so the three-row cylindrical roller slewing ring is more stable in the operation process, the noise is low, the vibration is small, and the work efficiency and reliability of the equipment can be improved.

Long life: high bearing capacity, good rigidity and smooth operation, so that the three-row cylindrical roller slewing ring has a long service life under normal use conditions, reducing the maintenance and replacement cost of the equipment.

Compact structure: Under the same load capacity, the axial and radial dimensions of the three-row cylindrical roller slewing ring are relatively small and compact, which can make the design of the host equipment more compact and save installation space.

The price of a three-row cylindrical roller slewing ring

The price of three-row cylindrical roller slewing rings is affected by a variety of factors, such as size, accuracy, brand, material, manufacturing process and market supply and demand, so the price difference is large. Here are examples of price ranges for some common products:

Simple specifications for small or non-standard customization: three-row cylindrical roller slewing rings with small diameter and low bearing capacity, the price may range from a few hundred yuan to several thousand yuan. For example, some slewing rings for small machinery or experimental equipment may cost around 500 - 3000 yuan.

Medium size and conventional accuracy: Medium size slewing rings suitable for general industrial equipment, the price is usually between thousands of yuan and tens of thousands of yuan. For example, the price of a product with a diameter of about 1-2 meters may be around 5,000-20,000 yuan.

Large and high-precision: large-scale, high-precision three-row cylindrical roller slewing rings, used for large cranes, wind turbines and other large-scale equipment, the price will be higher, may be from tens of thousands of yuan to hundreds of thousands of yuan or even higher. For example, the price of a large slewing ring with a diameter of more than 3 meters may be around 100,000 yuan - 500,000 yuan, and the price of products with special specifications and ultra-high precision requirements may be even higher.

How to check the installation accuracy of three-row cylindrical roller slewing rings?

Check the installation accuracy of three-row cylindrical roller slewing rings, which mainly involves the following key aspects:

Radial circular runout

Measuring tools: Dial gauges are generally used to measure.

Measurement method: fix the dial gauge on the stable support, make the gauge head perpendicular to the outer surface of the slewing ring, and then slowly rotate the slewing ring, observe the swing range of the dial gauge pointer, record the maximum value and the minimum value, and the difference between the two is the radial circular runout value.

Accuracy requirements: Generally, for applications with high accuracy requirements, radial circular runout should be controlled between ±0.05mm and ±0.1mm; For general industrial applications, ±0.1mm to ±0.2mm can be allowed.

Axial channeling momentum

Measuring tools: Dial gauges can also be used to measure.

Measurement method: the dial gauge is installed in a position that can be fixed and can accurately measure the axial displacement, so that the gauge head is in contact with the end face of the slewing ring, and then by pushing or pulling the slewing ring, it produces axial displacement, and observes the reading change of the dial gauge to obtain the axial channeling momentum.

Accuracy requirements: In high-precision applications, the axial channeling momentum is usually controlled from ±0.02mm to ±0.05mm; In general, ±0.05mm to ±0.1mm can be allowed.

The parallelism of the mounting plane

Measuring tools: A spirit level or laser rangefinder is often used to measure the parallelism of the mounting plane.

Measurement method: when using the level, place it on the mounting plane, measure it at different positions, observe the bubble offset of the level, so as to judge the levelness and parallelism; Laser rangefinders can calculate parallelism by measuring the difference in distance between different points.

Accuracy requirements: The parallelism error of the installation plane should generally be controlled within 0.05mm to ±0.1mm per meter ±.

Runout and pitch accuracy of ring gears

Measuring tools: A dial gauge can be used to measure ring gear runout, and a special pitch gauge is required for gear pitch accuracy.

Measurement method: When measuring the runout of the gear ring, the gauge head of the dial gauge is against the top circle of the gear ring, rotate the gear ring, and observe the reading change of the dial gauge; The tooth pitch measuring instrument judges the accuracy of the tooth pitch by measuring the tooth pitch one by one.

Accuracy requirements: The radial runout of the gear ring is generally controlled from ±0.05mm to ±0.1mm, and the gear pitch accuracy is usually required to be within ±0.05mm.

Three Row Cylindrical Roller Slewing Bearing Supplier

LTZC Bearings is a professional manufacturer specializing in three row cylindrical roller slewing bearings, other types of slew bearings, slew rings, slew drives and bearings parts. We are committed to supplying high quality and advanced three row cylindrical roller slewing bearings to global customers. If you are seeking reliable three row cylindrical roller slewing bearings for your project, feel free to get in touch with us.