INA in mining: bearings for crushers, mills, screens and conveyor belts

In mining, INA needle bearings appear in gearboxes, pumps and mechanisms where radial space is limited and loads are high. Their compact design allows them to withstand considerable forces in small diameters, something common in crushers and auxiliary systems. We supply these bearings for maintenance of critical equipment.

To identify them, look at the engraving on the side face: codes like NAO9 correspond to needle bearings without inner ring, while IR20 and IR22 are inner rings ordered separately. It is key to verify whether the original bearing includes the inner ring or if it is purchased separately, because that changes the order. Send a photo of the code and the shaft and housing dimensions.

A common mistake is to order only the bearing when the inner ring is worn and must be replaced together. Another is to confuse the series by the outer diameter without measuring the width. We distribute INA needle bearings and help you confirm the exact reference with the equipment plate data.

Y-bearings with housing, also called inserts, are used in conveyor belts, idlers and screens where mounting must be quick and self-alignment helps absorb misalignments. In mining, these bearings withstand dust, moisture and variable loads, so the seal and correct fit are decisive.

The INA codes of this line, such as UK205, UK206 and UK207, correspond to inserts of this line. The insert is mounted in a pillow block or take-up housing, and the assembly is fixed to the frame. For a quote, we need the complete bearing code and, if possible, the housing reference or the center height dimensions.

When replacing, check the seal and the fixation of the insert on the shaft. A poorly adjusted insert can rotate on the shaft and damage the seat. We work with INA Y-bearings and indicate the option according to the diameter and the type of housing used by your equipment.

INA cam and support rollers are used in cams, linear guides and drive systems of vibrating feeders and crushers. They support radial loads and, depending on the design, also axial loads, with an outer profile that can be cylindrical or crowned. They are wear parts replaced with certain frequency.

Codes like KR22, KR40 and KR26 identify rollers with inner stud, ready to mount with a nut. The number indicates the approximate outer diameter in millimeters, but it is always advisable to confirm with the catalog. When ordering, send the engraved code and, if unreadable, the outer diameter, total width and stud diameter.

A typical mistake is to over-lubricate these rollers, which can damage the seals and cause contamination ingress. Another is not respecting the stud tightening torque, generating play or breakage. We supply INA cam rollers and quote the exact replacement for your mining application.

INA cylindrical roller thrust bearings support purely axial loads in one direction, such as those appearing in vertical shafts and gearboxes. They consist of a cage with rollers and, depending on the design, shaft and housing washers ordered separately. They are compact and rigid.

In INA codes, the GS series identifies housing washers: for example, GS81102, GS81120 and GS81103. The cage and shaft washer have their own references, so the complete assembly must be ordered if replacing everything. For a quote, send the three codes or a photo of the equipment plate.

A frequent mistake is to mount the thrust bearing backwards, which destroys the bearing in a few hours. The washer with shaft fit goes on the rotating side, and the housing washer remains fixed. We distribute INA cylindrical roller thrust bearings and advise you to order the correct set.

In mining maintenance, it is sometimes convenient to replace only the needle cage or internal components instead of the complete bearing. INA cages keep the needles separated and guided, and are used in gearboxes, pumps and feed mechanisms. They are precision parts that require a housing in good condition.

Cage codes, such as K100, K120 and K220, correspond to needle cages. Each cage has a specific width and outer diameter, so the shaft diameter alone is not enough. To order, send the engraved code or the three dimensions: inner diameter, outer diameter and width.

A common mistake is to reuse a cage with pitted needles or excessive play, which accelerates shaft wear. Another is not checking the housing condition before mounting the new cage. We supply INA cages and needle components for repairs in mining equipment.

In addition to standard series, there are INA special bearings for demanding load or speed conditions in specific mining equipment. These bearings usually have particular designs.

As they are not standard series, identification is based on the complete code engraved on the part and, if available, the drawing or order number of the equipment manufacturer. It is essential to send a clear photo of the bearing and the equipment plate. With that data, we quote the INA special bearing you need.

A frequent mistake is to try to replace a special bearing with a standard one of similar dimensions, which can fail prematurely. Another is not considering the original fits and tolerances. We distribute INA special bearings and help you get the exact reference for your application.

INA freewheels allow rotation in one direction only and are used in inclined conveyors, backstop systems and intermittent feed mechanisms in mining. They prevent the load from rolling back if power is cut, protecting equipment and people. They are safety components that must be kept in good condition.

To order an INA freewheel, you need the complete code engraved on the part or the inner, outer and width dimensions, plus the free rotation direction. Some models include an integrated support bearing. Send a photo and equipment data so we can quote the correct freewheel.

A common mistake is to mount the freewheel backwards, which blocks rotation in the wrong direction and can damage the mechanism. Another is not lubricating according to specification, shortening service life. We supply INA freewheels and advise you on selection for your mining application.