INA Bearings: How to Choose by Application

INA needle bearings are the choice when radial space is limited but the load is high. They use thin, long cylindrical rollers, giving them a high load capacity in a reduced outer diameter. They are common in gearboxes, motors, pumps, and transmission systems where every millimeter counts. If your application has little space and high demands, this type of bearing is usually the solution.

Within this category, you'll find variants such as IR inner rings, complete NAO bearings, and needle cages. For example, IR65 and IR12 are inner rings for needle bearings of different sizes, and NAO9 is a needle bearing of the NAO series. Each code corresponds to a specific size and design, so it's best to verify the full number before ordering.

To request a quote for an INA needle bearing, send the code engraved on the part or the inner, outer, and width measurements. It also helps to know if it works with a hardened shaft or if it needs its own inner ring. A common mistake is assuming all needle bearings are the same: the cage, needle type, and surface treatment change performance. If you have doubts, send us a photo of the part and we'll help you identify it.

Y-bearings, also called inserts, are ball bearings with a spherical outer ring and a pillow block or flange housing. They are used in agricultural applications, conveyors, fans, and general machinery where the shaft is long and mounting must be quick. The spherical shape compensates for slight misalignments between housings, which is very useful in welded or sheet metal structures.

In this line, you'll find codes such as UC209, UK217, and UC205. The UC series has a cylindrical inner ring with set screws, while the UK uses a tapered adapter sleeve for firmer fixation. For example, UC205 corresponds to a 25 mm shaft; with the full code, we confirm the exact size.

When ordering an INA Y-bearing, indicate the full code and the type of housing you use: pillow block, two- or four-bolt flange, or take-up. It's also key to know if the shaft is metric or inch and if you need a locking sleeve. A frequent mistake is confusing the UC series with the UK: the former fixes with screws, the latter with a tapered sleeve. If you're not sure, send us a photo of the bearing and housing.

INA cam followers and support rollers combine a needle or ball bearing with a thick outer ring that acts as a wheel. They are mounted on cams, linear guides, transport systems, and machine tools where they must roll on a track or profile. The outer ring is designed to withstand high radial loads and, in some cases, light axial loads.

Typical codes are KR35, KR22, and KR40. The KR series are stud-type cam followers, fixed with a nut to the machine structure. The number indicates the outer diameter in millimeters: KR35 has a 35 mm outer diameter, KR22 has 22 mm, and KR40 has 40 mm. It's best to order them by the full code, as engraved on the part.

To request a quote for an INA cam follower, you need the exact code or the outer diameter, width, and stud diameter and length. It's also helpful to know if it works with grease or oil lubrication and if the environment has dust or moisture. A common mistake is ordering only by outer diameter without checking the width or stud. Send us a photo with the measurement and we'll quote it.

INA cylindrical roller thrust bearings support axial loads in one direction and are ideal for applications with strong thrust. They are used in machine tool heads, gearboxes, cranes, and equipment where the main force is along the shaft. Their design with cylindrical rollers and flat washers allows high rigidity and low friction.

In this category, you'll find codes such as 81232-M, GS81115, and GS81214. Codes starting with GS are housing washers for thrust bearings, while codes like 81232-M correspond to the 812 series thrust bearing.

When ordering an INA cylindrical roller thrust bearing, indicate the full code or the inner, outer, and height measurements. It's important to know if you need the complete assembly or just the support washer, because sometimes one part wears out and the other remains in good condition. A common mistake is confusing the shaft washer with the housing washer during mounting: they have different diameters and each goes in its place.

INA needle cages and components are used when the bearing is integrated directly into the machine housing. Instead of a complete bearing, a cage with needles is mounted on a hardened shaft and inside a ground hole. This reduces radial space and is widely used in gearboxes and small motors.

Example codes are K130, K165, and K210. The K series corresponds to needle cages without rings. These cages are ordered by the full code, with all their measurements, because the width and needle vary from one to another.

To request a quote for an INA needle cage, you need the code or the inner, outer, and width measurements. It's also key to know the hardness of the shaft and housing: if they are not hardened, the cage wears quickly. A common mistake is using a needle cage on a soft shaft without surface treatment. If you have doubts about the application, consult us with the part data.

Within the INA catalog, there are special bearings for applications where standard designs are not enough, such as those combining needles with balls in the same part. They appear in mechanisms where space and load are critical.

This category is broad and codes vary according to the specific design. There is no single series as with needle bearings or Y-inserts. Therefore, correct identification requires the code engraved on the part or a drawing with the main measurements. If you have an INA special bearing, the best is to send us a photo and dimensions to find the exact reference.

When requesting a quote for an INA special bearing, include all available information: code, measurements, brand, and application. If you don't have the code, a sketch with diameters and widths helps a lot. A common mistake is trying to replace it with a standard bearing without verifying loads and mounting. With the data you provide, we look for the reference and quote it.

INA freewheel clutches allow torque transmission in one direction and free rotation in the opposite. They are used in starters, intermittent feed systems, safety mechanisms, and applications where the shaft must not reverse. Their design with internal locking elements ensures fast and silent engagement.

INA freewheel clutch codes vary by design, so identification is done by the full code or the inner, outer, and width measurements. Some freewheels are mounted directly on the shaft, others need a special housing.

To request a quote for an INA freewheel clutch, send the code or measurements and the required rotation direction. It's also important to know the torque to transmit and the rotation speed. A common mistake is mounting the freewheel backwards: the locking direction must match the transmission direction. If you have doubts, consult us with the application data.