Linear bearings for CNC. Precision bearings Bearings for lathes

The production of bearings requires special precision and care. The conditions for using parts in modern equipment require strict compliance with these requirements. Increased accuracy is guaranteed in the manufacture of precision bearings that correspond to the rare categories P2 and P3. The use of high-tech bearing production technologies determines the key advantages of the products:

• low noise level;
• wear resistance;
• ability to operate at high speeds;
• low level of friction and heat production;
• reduced inertia rates.

The only drawback of high-precision products is their increased cost, which is compensated by quality and optimal technical characteristics. This is what contributes to the widespread use of precision bearings in various fields of modern industry. They are most often used in the production of rolling machines, printing equipment, pumping systems and turbines, vehicles, semiconductor equipment, stabilizers, and ball gears.

Many leading global companies produce high-precision bearings. One of the leaders in this area is the Japanese corporation NSK. Its products are distinguished by impeccable precision, the use of high-tech technologies and high-quality raw materials (steel grades EP, Z, SNX; ceramics; polymers). Another industry leader is the Italian company SKF, which dynamically monitors the market and offers consumers quality products that meet current demand. The variety of bearing types offered by the manufacturer finds its application in aerospace, machine tool building and other modern production.

Precision angular contact bearings

For the production of NKS products (series 70, 72, 79), polymer or polyamide material is used. The accuracy of the parts corresponds to class P2-P4 with a contact angle of 15/25/30 degrees. The diameter of the bearings ranges from a minimum of 5 mm (70-72 series) to a maximum of 280 mm (79 series). The advantages of angular contact bearings are as follows:

• reduced heating coefficient, the achievement of which is facilitated by the use of computer modeling methods;
• possibility of operation at high speed conditions;
• compliance with ISO standards and high accuracy;
• heat resistance and high level of wear.

To improve the performance and quality of bearings, various materials are used for the production of rings and balls: SUJ2 steel, SUJ2 steel/silicon nitride, SNX steel, ceramics/silicon nitride. A variety of size series meet different production needs of customers. You should purchase components taking into account the shaft diameter, contact angle, and level of accuracy. Appropriate markings allow you to select the optimal type of bearings.

In this category, SKF offers bearings of types D, E, B, which can be used for the production of equipment designed to operate in harsh conditions and with high load levels. The load-carrying capacity of the products has been increased by optimizing the size, number of balls, as well as the contacts of the balls with the tracks.

Precision roller bearings

This type of product from NKS is used in machine tools and processing equipment that are subject to high operating loads. This is due to the required level of rigidity and high wear resistance that distinguish NSK products. Single and double row cylindrical bearings are available to the consumer. It is worth highlighting the features of each of the available options:

1. Double row bearings are distinguished by:

• increased level of rigidity;
• compliance with high accuracy standards P2, P4;
• the presence of a ribbed triple inner (NN type) / outer (NNU type) ring;
• use of brass and polymers with high operating temperatures.

2. Single-row products are characterized by the following features:

• use of internal double ribbed ring (type N);
• use in the production of monomaterials (SUJ2 steel), as well as combined combinations of steel, polymers, ceramics;
• wide range of product diameters (30-140 mm);
• release of a high-speed series of products (45-85 mm).

SKF offers roller bearings manufactured to the UP/SP precision standard and conforming to type N-10. The presence of a conical hole in a ratio of 1 to 12 allows for accurate installation of products that are capable of operating at a speed of no more than 1.6 ndm.

The design feature of single-row roller bearings is the presence of an inner race in combination with guide flanges and an outer race without flanges. Cages are additionally reinforced with glass fiber if they are used for diameters over 80 mm.

Operating parameters of NN30 single row roller bearings:

• internal diameter 25-280 mm;
• presence of cylindrical/conical holes;
• compliance with UP/SP accuracy standards;
• work in high-speed mode with an ndm factor of 750,000.

Optimal indicators of rigidity, speed, and load capacity make the products the best solution for equipping machine tools and other machinery.

Thrust radial precision bearings

Production needs often require the use of ultra-precision Robust angular thrust ball bearings. The products are distinguished by their compliance with a high accuracy class (P2A/P4A), as well as ISO norms and standards. The products provide a contact angle of 30º (BAR type)/ 40º (BTR type). The dimensions of the products correspond to the nomenclature parameters of the 10th series. The production uses SUJ2 steel (rings) and ceramics (balls). A separator made of polyamide or brass operates in the direction away from the balls, which helps ensure high speed conditions with a coefficient of up to 1.4 million and heat resistance within 120º. The internal diameter of the products ranges from 50 to 200 mm.

In this case, products of the TAC type (angular contact) are distinguished by the following technical characteristics:

• accuracy category PN 7;
• contact angle 60º;
• size chart 20X/29X;
• internal diameter range from 35 to 280 mm.

BTM axial radial bearings feature a non-separable design with a contact angle of 30º (A) and 40º (B). The products absorb significant bilateral axial loads at high gross revolutions. Operating parameters:

• internal diameter from 60 to 150 mm;
• compliance with accuracy class P4C;
• performing centering of the separator on the balls;
• speed factor ndm within 700,000.

Products in the 2344 series are products that can withstand extremely high levels of axial loads. Their internal diameter is up to 200 mm with a contact angle of 60º. The separator is made of RA-66 with reinforcement. The speed factor ndm is 450,0000/600,000, depending on the type of lubricant.

Radial precision high precision bearings

Precision radial ball bearings are used in the production of electric motors, as well as spindles used in woodworking equipment. The products feature high speed operation, low noise production, low friction and low heat generation. The degree of accuracy from production corresponds to class P2-P5 with size series 62, 63, 60. Combined materials are used in production: steel/silicon nitride.

Koyo products

The Japanese company Koyo offers a range of various types of precision bearings of standard and non-standard series. The product range corresponds to production needs. The variety of diameters and other technical characteristics meets the needs of the modern market. In the production of angular contact and roller bearings, high-quality and high-strength materials are used to guarantee the finished product wear resistance, the required level of strength and rigidity, and optimal speed characteristics. The scope of application of products with a high level of manufacturing precision is constantly expanding, which helps to improve the operational capabilities of various types of equipment.

Linear bearings are ball guides for bushings and shafts. They are installed in the machines of industrial enterprises to ensure conveyor production of products.

Linear bearings and linear guides: types, features

There are several types of bearings. Their main difference is in the method of movement around.

The first type is a bearing with a carriage. Its advantages: high strength, long service life. How the part works - inside the carriage there are 4 balls that pass through special grooves as it moves. They provide a rolling effect, pushing each other as they move along the tracks. To prevent dirt from getting inside the carriage, seals are installed in the bearings.

The second type is in the form of a metal cylinder. Balls made of metal move inside it according to the principle of a closed circuit. Features of the element of this model are free movement along the shaft

Main advantages of linear bearings

• good load capacity, which allows the part to withstand significant loads placed on it;
• slight noise during operation;
• low level of friction, which allows you to extend the service life of the product;
• affordable price for all models of guides of this type;
• Possibility of installation in machines for various purposes.

Buy a linear bearing in Moscow on favorable terms

If you want to buy components for a CNC machine in an online store, explore the range of products that 3DIY offers. With us you will find parts that will fit your production machine. Browse the product catalog and you can choose and buy a linear bearing that will suit you according to its characteristics.

When purchasing goods from us, you will not have to wait long for your order to be delivered. All products presented on the website are in stock. Another advantage of purchasing parts for machine tools in our store is that we have the lowest prices for linear bearings. This makes its acquisition accessible to both private buyers and companies that purchase large quantities of parts for their production machines.

Our company sells a wide range of components for CNC machines. This catalog provides a wide range of bearings.

We offer the following types of bearings:

• Radial;
• Radial - persistent;
• Spindle.

Each type of product has a wide range of sizes for different machines. If you do not find a product that suits you, call the phone number listed on the website.

Bearing types:

Radial bearings. The most popular type. Simplicity, reliability, durability - thanks to this, radial bearings are widely used in all industries. They can be found everywhere, from mechanical engineering to use in machine tools. This is one of the most inexpensive types of bearings.

Radial thrust ball bearings. Used in places where the bearing will be subject to load. When choosing an angular contact bearing, you should take into account its characteristics, internal and external diameters.

Spindle. The bearings have the fourth accuracy class and are capable of operating at high torque. As the name suggests, they are used for installation on machine spindles. There are several types of products; the most durable and reliable are hybrid spindle bearings, in which ceramic balls are installed, which increases their reliability and wear resistance.

When choosing a bearing for a CNC machine, several parameters should be taken into account:

• Torque transmitted to the bearing;
• The load that will act on it;
• Accuracy class.

If you do not find the product you need or have any questions, call the phone number listed on the website. Our specialists will advise on the most suitable equipment, give recommendations and tell you about the range.

In industrial machines and mechanisms, such as metal-cutting machines - lathes, milling, drilling - high demands are placed on bearings. Bearings of machine tools must have high rigidity, accuracy and maximum rotation speed. Their main use in machine tools is as a spindle bearing.

In addition to rotating units, machine tools also use linear motion bearings, commonly called linear guides.

SKF high precision rolling bearings

Cylindrical roller bearings with silicon nitride rolling elements (SNCRB)
These bearings represent one of the best and simplest solutions for high-speed spindles in applications where high radial loads are required with high structural rigidity. The noteworthy features of SNCRB rolling bearings are designed specifically to provide operating speeds much higher than traditional cylindrical roller bearings by incorporating advanced ceramic rolling elements and high-speed, high-tech plastic cages.

High precision sealed angular contact bearings
An analysis of the causes of bearing failures shows that about 40% of the total number of failures is caused by contamination. New SKF high-precision sealed angular contact bearings solve contamination problems. As a result, machine downtime is minimized and equipment operating time between repair stops is increased.

Nitro alloy bearings
Recent SKF R&D into new materials has led to the development of bearings with nitrided steel rings. In addition to the special characteristics of the steel, which make these bearings suitable for use in aggressive environments and severe operating conditions (such as contaminated lubricants or high speeds), the new bearings are manufactured with silicon nitride rolling elements, which improve the dynamic characteristics of the bearings.

Oil-Air lubrication system
VOGEL lubrication systems meet the requirements of the latest generation of high-speed machine tools and provide optimal lubrication conditions, thereby protecting machine tools from damage, especially critical machine components. VOGEL lubrication systems (oil, grease, or Oil-Air system) monitor lubrication conditions and precisely dose the required lubricant. Vogel lubrication systems are ready-to-install units for production equipment in a simplified manner to ensure the correct operation of spindles and high-quality bearings.