NTN guide
What NTN manufactures and what it stands out for
NTN manufactures a wide range of bearings and power transmission components. Its line includes ball bearings, roller bearings, housings, bushings, sleeves and linear motion systems. The brand stands out for dimensional precision, material quality and manufacturing consistency, which translates into long-life, low-maintenance bearings.
In the Argentine industrial market, NTN is a common choice for applications demanding reliability, such as gearboxes, pumps, fans, conveyors and heavy machinery. Its catalog covers from general-purpose deep groove ball bearings to special bearings for combined loads or misalignments.
NTN lines sold by MR
MR Accesorios Industriales sells the main NTN lines for Argentine industry. We work with bearings, bearing housings, bushings and sleeves, and linear motion components. Within each category, we sell the main subcategories for maintenance and production.
In bearings, subcategories include tapered rollers, angular contact, Y-bearing (insert), cylindrical rollers, spherical rollers, cam and support rollers, needle bearings, cages and needle components, thrust ball, deep groove ball, angular ring for cylindrical rollers, thrust cylindrical rollers and spherical ball. In bearing housings, the main subcategory is Y-housing with insert bearing. We also sell bushings and adapter and withdrawal sleeves, and linear guide carriages.
Main NTN series
NTN organizes its bearings into series that indicate the design type and size range. Knowing the series helps quickly identify the product and select the correct replacement. Below are the most relevant series we sell.
K series: needle cages
The K series corresponds to needle cages for bearings without rings. They are used in applications with reduced radial space and high load capacity. Codes indicate dimensions in millimeters: inner diameter, outer diameter and width. Examples: K10×14×8, K12×15×9.
NU series: cylindrical rollers
The NU series are cylindrical roller bearings with inner ring without flanges, allowing axial displacement. They support high radial loads and are used in gearboxes, pumps and machine tools. Examples: NU208, NU209.
23xx series: spherical rollers
The 23xx series are spherical roller bearings with two rows of rollers and spherical raceway on the outer ring. They compensate misalignments and support combined radial and axial loads. Examples: 23988, 23992.
HJ series: angular rings
The HJ series are angular rings mounted next to the inner ring of NU or N cylindrical roller bearings to fix them axially and allow axial load in one direction. Examples: HJ204, HJ205.
NN series: double row cylindrical rollers
The NN series are double row cylindrical roller bearings with high radial rigidity. They are used in machine tool spindles and precision applications. Examples: NN3005, NN3006.
22xx series: spherical rollers
The 22xx series are double row spherical roller bearings. They support high radial loads and misalignments. Examples: 22360B, 22360BK.
32xx series: tapered rollers
The 32xx series are single row tapered roller bearings. They support combined radial and axial loads. They are used in gearboxes and wheel axles. Examples: 32920, 32938.
E series: tapered rollers
The E series includes NTN tapered roller bearings with E- prefix. They support combined radial and axial loads. Examples: E-623024, E-623028.
How to read an NTN code
The NTN designation follows an alphanumeric system that indicates type, series, dimensions and characteristics. Understanding the structure allows identifying the bearing without a catalog. Below are real examples from the catalog.
Example 1: 7000
The code 7000 corresponds to a single row angular contact ball bearing. The first digit (7) indicates the type, and the last two (00) indicate an inner diameter of 10 mm. It is the smallest in the 70xx series.
Example 2: 1200S
The code 1200S is a self-aligning ball bearing. The number 1200 indicates the series and size, and the letter S is an execution suffix. The inner diameter is 10 mm.
Example 3: 21311
The code 21311 is a spherical roller bearing. The first three digits (213) indicate the series, and the last two (11) indicate an inner diameter of 55 mm. It is used in applications with high radial loads and misalignments.
Example 4: 32920
The code 32920 is a tapered roller bearing. The first three digits (329) indicate the series, and the last two (20) indicate an inner diameter of 100 mm. They support combined loads.
Example 5: 30218U
The code 30218U is a tapered roller bearing. The first three digits (302) indicate the series, 18 indicates inner diameter of 90 mm, and the letter U is an NTN execution suffix.
Example 6: 51100
The code 51100 is a thrust ball bearing. The first three digits (511) indicate the series, and the last two (00) indicate an inner diameter of 10 mm. It supports axial loads in one direction.
Example 7: 5200S
The code 5200S is a double row angular contact ball bearing. The number 5200 indicates the series and size, and the S indicates a specific characteristic. Inner diameter of 10 mm.
Example 8: ARP-1
The code ARP-1 is a Y-housing with insert bearing. ARP indicates the housing type, and the number 1 the size. It is used in conveying and transmission applications.
Example 9: SN506
The code SN506 corresponds to a bearing housing. SN indicates the housing type and 506 the size; check the data sheet for dimensions and the bearing it houses.
Example 10: NA497
The code NA497 corresponds to a needle bearing from the catalog. Before ordering, check the data sheet for dimensions and execution.
Example 11: BK0509
The code BK0509 is a needle bearing with outer ring and without inner ring. BK indicates the type, and 0509 the dimensions (5 mm inner diameter, 9 mm outer diameter).
Example 12: NU208
The code NU208 is a cylindrical roller bearing. NU indicates the type, 2 the light series, and 08 the inner diameter of 40 mm. It allows axial displacement.
Example 13: LGMC09 BL
The code LGMC09 BL is a linear guide carriage. LGMC indicates the series, 09 the size, and BL a sealing or configuration variant. It is used in linear motion.
Frequent NTN prefixes and suffixes
Suffixes in NTN codes indicate internal characteristics, sealing, cage or clearance. Knowing them helps select the correct bearing for each application. Below are the most common.
Sealing suffixes
Suffixes ZZ or 2Z indicate metal shields on both sides. Suffixes 2RS or LLU indicate rubber seals on both sides. For example, a 6205ZZ bearing has metal shields, and a 6205LLU has rubber seals.
Internal clearance suffixes
Suffix C3 indicates internal clearance greater than normal. It is used in applications with high temperatures or interference fits. Suffix C2 indicates smaller clearance. Normal clearance has no suffix.
Cage suffixes
Some suffixes indicate the cage type, for example steel sheet, machined brass or polyamide. The exact letters vary by series, so it is best to confirm them in the product data sheet.
Special series prefixes
The prefix 4T identifies NTN tapered roller bearings. The prefix E appears in an NTN series of tapered rollers. These prefixes appear before the base number.
Applications by industry in Argentina
NTN bearings are used in virtually all industries. Below are the main applications by sector in Argentina.
Metallurgy
In the metallurgical industry, NTN bearings are used in rolling mills, shears, presses and roller tables. Spherical and cylindrical roller bearings are required to withstand heavy loads and high temperatures.
Agriculture
In agriculture, insert bearings and Y-housings are common in seeders, harvesters and conveying equipment. They are valued for their easy mounting and resistance to contamination.
Naval
In the naval industry, NTN bearings are used in propulsion shafts, winches and cranes. Large-size and corrosion-resistant bearings are required.
Oil and gas
In the oil industry, NTN bearings are used in pumps, compressors and drilling equipment. High-reliability bearings resistant to aggressive environments are required.
Food
In the food industry, NTN bearings with adequate seals and lubrication are used in conveyors, mixers and packaging machines. Hygiene and washdown resistance are prioritized.
Mining
In mining, large-size NTN bearings are used in mills, screens and conveyor belts. They withstand extreme loads and contamination from dust and water.
Paper
In the paper industry, NTN bearings are used in paper machine rolls, pumps and dryers. Precision and high-temperature resistant bearings are required.
Cement
In cement plants, NTN bearings are used in kilns, mills and conveyors. They withstand heavy loads, high temperatures and dusty environments.
Energy
In power generation, NTN bearings are used in turbines, generators and auxiliary equipment. High-precision and reliable bearings are required.
Automotive
In the automotive industry, NTN bearings are used in gearboxes, differentials and wheels. High-speed and durable bearings are required.
Plastics
In the plastics industry, NTN bearings are used in extruders, injection molding machines and blow molding machines. They support combined axial and radial loads.
Refrigeration
In the refrigeration industry, NTN bearings with special seals are used in conveyors and cold equipment. They resist low temperatures and humidity.
Sugar
In the sugar industry, NTN bearings are used in mills, conveyors and centrifuges. They withstand heavy loads and humid environments.
How to choose the correct NTN
Choosing the right NTN bearing requires evaluating operating conditions. The main criteria are load, speed, sealing, internal clearance and mounting.
Load
Determine whether the load is radial, axial or combined. For pure radial loads, deep groove ball or cylindrical roller bearings are suitable. For combined loads, angular contact or tapered. For axial loads, thrust ball or roller bearings.
Speed
Rotation speed influences selection. Ball bearings withstand higher speeds than roller bearings. Check the limiting speed in the NTN catalog.
Sealing
If the environment has dust, moisture or contaminants, choose bearings with seals (2RS) or shields (ZZ). Seals retain grease and prevent particle entry.
Internal clearance
Internal clearance affects operation. For interference fits or high temperatures, C3 clearance is recommended. For precision applications, normal or C2 clearance.
Mounting
Consider the mounting type: on cylindrical shaft, tapered or with sleeve. Bearings with tapered bore are mounted with adapter or withdrawal sleeves.
Environment
In corrosive environments or with frequent washdowns, choose bearings with special seals and adequate lubrication. NTN offers variants for severe conditions.
Equivalences and interchangeability
Many NTN codes have their correspondence in other brands, since dimensions are standardized. At MR we can help you find the equivalent if you bring the code from another brand or an unidentified part.
Examples of equivalences
NTN bearing 7306B has its correspondence in NSK 7306B and TIMKEN 7306B. NTN 6228, in SKF 6228, FAG 6228, NSK 6228 and TIMKEN 6228. NTN 7207B, in NSK 7207B and TIMKEN 7207B. These codes share the main dimensions; confirm suffixes and execution before replacing.
Frequent errors when replacing or buying NTN
When replacing an NTN bearing, it is common to make mistakes that affect performance. Knowing them helps avoid them.
Not checking the suffix
A base code can have several suffixes that change sealing, clearance or cage. For example, 6205, 6205ZZ and 6205C3 are different bearings. Always check the complete code.
Ignoring internal clearance
Incorrect internal clearance can cause overheating or vibration. If the original bearing has C3, replace it with C3, not normal clearance.
Using a lower capacity bearing
Do not replace a roller bearing with a ball bearing just because of the same diameter. Load capacity and limiting speed are different. Consult the catalog.
Improper mounting
Mounting with blows or without the right tools damages the bearing. Use cold mounting methods or controlled heating according to size.
Mounting, lubrication and maintenance
Correct mounting and lubrication are key to the service life of the NTN bearing. Follow these practices to avoid premature failures.
Mounting
Clean the shaft and housing before mounting. Use appropriate tools: press, mounting sleeves or induction heating. Never strike the bearing directly.
Lubrication
Use the grease or oil recommended for the application. Do not mix incompatible lubricants. Respect the quantity: excess grease causes overheating.
Maintenance
Monitor temperature, noise and vibration. Schedule relubrications according to service hours. Replace bearings when they show signs of fatigue or wear.
Why get a quote for NTN at MR Accesorios Industriales
MR Accesorios Industriales, with a history since 1945 in Buenos Aires, Argentina, is an official distributor of NTN. We sell bearings, housings, bushings and linear motion products of the brand, with an online catalog by code and technical advice.
If you need an NTN bearing, send us the code, measurement or a photo of the part via WhatsApp or email. We will quote you promptly and help you choose the correct product for your application.
Frequently asked questions about NTN
- How do I read an NTN bearing code?
- The NTN code consists of a base number indicating type and size, and suffixes indicating characteristics. For example, 6205ZZ is a deep groove ball bearing with metal shields. The last two digits of the base number usually indicate the inner diameter in mm (05 = 25 mm). Suffixes such as C3 indicate internal clearance, 2RS rubber seals, and M brass cage.
- What does the C3 suffix mean in an NTN bearing?
- The C3 suffix indicates that the bearing has greater internal clearance than normal. It is used in applications with high temperatures, interference fits or heavy loads, where the bearing needs more clearance to compensate for thermal expansion and prevent binding.
- Is NTN a good bearing brand?
- Yes, NTN is a brand recognized worldwide for the quality and precision of its bearings. Its products are used in demanding industrial applications, such as mining, metallurgy and automotive, where reliability and long service life are required.
- Where to buy NTN bearings in Argentina?
- You can buy NTN bearings at MR Accesorios Industriales, official NTN distributor from Buenos Aires, Argentina. We sell the bearing line and quote you via WhatsApp or email with the code or measurement you need.
- How do I know if an NTN bearing is original?
- To ensure an NTN bearing is original, buy it from authorized distributors such as MR Accesorios Industriales. Check the packaging, the markings on the bearing and the quality of the finish. Avoid products of dubious origin.
- What NTN bearing do I use for an electric motor?
- For an electric motor, the most common is to use deep groove ball bearings of the 62 or 63 series, with seals or shields depending on the environment. For example, 6205ZZ or 6306C3. The choice depends on the motor size and operating conditions.
- Does NTN have housings with insert bearing?
- Yes, NTN manufactures Y-housings with insert bearing, such as the UCT series (take-up) and others. These assemblies are used in conveyors and agricultural machinery. MR Accesorios Industriales sells these NTN housings with insert bearing.
Updated September 29, 2026