NTN Bearing Corporation
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With more than ninety years of manufacturing expertise in ball bearings, NTN offers one of the industry’s widest arrays of products to fit your application.
Our ball bearings are available to you off-the-shelf, in sizes ranging from 10 mm to 320 mm outside diameters. And with a virtually limitless variety of configurations of seals, shields, lubricants, internal clearances, and cage designs, there’s no reason to go anywhere else for your ball bearing needs. Select from the options at left to learn more about NTN’s ball bearing offerings. |
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| Tapered roller bearings utilize conical rollers and raceways, arranged so that the rollers and raceways meet at a common apex. The rollers are guided by contact between the large end of the roller and a rib on the inner ring. This provides high capacity for radial and single thrust loads. |
| Premium Brands, Premium Materials |
 We offer premium tapered roller bearings under the NTN and Bower® brand names. Most NTN and all Bower® tapered roller bearings feature case-carburized components. Cups, cones, and rollers are made from case-hardened alloy steel of “Bearing Quality” to provide superior fatigue life and reliability. Precise control of heat treatment, dimensions, and surface finish of the components further contribute to reliable bearing performance. So whether you’re looking for an American-made, case-carburized inch series taper, or a metric series through-hardened variety, we have you covered with a proper fit for your application. Premium steels and heat treatments are also available for applications requiring extended life and high reliability. |
| XL100 |
| In the good, better, and best ranking of bearings, XL100 is NTN’s best. Its design encompasses many of the upgrades we offer in our bearings: enhanced material, enhanced heat treatment, and optimized roller crowning. These features increase the bearing’s life adjustment factor to 1.9, ultimately leading to longer bearing life. |
| As Heat Treatment |
| NTN’s Austenite Strengthening process (AS) is a special heat treatment applied to the rolling elements. By chemically altering the surface chemistry of the roller, we are able to create a thin layer of retained Austenite that results in compressive stresses that increase bearing life. AS Treatment alone results in a material life multiplier of 1.5. When used in conjunction with TMB, that life multiplier increases to 3.6. |
| HL Surface Treatment |
| NTN’s unique micro-pitting surface finish increases bearing life in applications with insufficient lubrication. Based on the theory that oil film formation in bearing contact areas can be improved by changing the character and direction of the components’ surface finishes, the distinguishing micro-pots are able to effectively capture and channel oil to where it’s needed. |
| Special Roller Crowning |
| NTN’s pioneering efforts in developing crowned rollers have resulted in greater load-carrying capability and longer bearing life. Crowned rollers under load distribute stress equally along their full length of contact with the raceways, thereby eliminating stress concentration at the roller ends. This design concept also compensates for minor misalignment between shaft and housing bore and deflection under load, thereby reducing stress concentration. |
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Diverse types of needle bearings are available in a wide variety of sizes and tolerances, for a multitude of applications. |
| • Needle roller and cage assemblies are offered in single or double row, solid or split cage, metric and inch sizes; as well as in connecting rod bearings for special applications. |
| • Single and double row bearings are available with or without ribs, and with or without inner rings. |
| • Thrust bearings are offered in single row roller and cage assemblies. |
| • Yoke and stud type track rollers are also available. |
Needle bearings feature a smaller cross-section, higher load-carrying capacity, greater rigidity, and lower inertia forces that facilitate size and weight reductions in machinery. They’re designed to withstand oscillation, perform under severe conditions, and interchange with sliding bearings.
| Installation & Removal Tools | NTN Bearing Installation and Removal Tools |
| Approximately 17% of bearing failures are due to improper installation and removal procedures. Use of NTN Bearing Tools ensures parts are installed and removed in a safe and efficient manner for maintenance and production shops alike. We offer a wide range of tools for Industrial applications including: |
| Mounting: |
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• Adjustable Spanner Wrenches • Mounting Tool Kit case • Heaters for Bearings, Rings, and Gears |
| Dismounting: |
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• Bore Pullers • Mechanical Pullers • Hydraulic Pullers • Pulling accessories for special applications |
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| NTN started production of constant velocity joints (CVJs) in Japan in 1963. In 2007, the number of CVJs produced on a cumulative basis surpassed 400 million units. Following aggressive expansion of production worldwide in the 1990s, we now have a strong base of operations to respond to the global sourcing needs of the automotive industry. These operations are supported by a trilateral development system covering the three key regions of the Americas, Japan and Europe. A production and sales system encompassing these three regions has expanded to include China and other parts of Asia. |
| We Manufacture Where We Sell |
| Since 1991, NTN has been producing American-made CVJs at our state-of-the-art manufacturing facility in Columbus, Indiana. This plant has been recognized for environmental stewardship by the government of Indiana and is a zero-landfill operation. We’ve continued to expand our global presence with more than 18 CVJ plants around the world. |
| Technoligy For Ecology |
| When it comes to manufacturing CVJs for automotive use, performance demands are depend on the type of joint and the location in which they will be used. So, at NTN, we develop special, environmentally conscious, lead-free grease for each type of CVJ and each differing application, so that each one of our joints can operate at its highest level. |
| Furthermore, as a pioneer in constant velocity joints, we’ve held ourselves to high environmental standards. NTN has answered the demand for lighter, more compact, and higher performance products to reduce fuel consumption. We’ve also provided environmentally considerate products that strictly adhere to both domestic and international environmental standards. |
| Technology For Comfort |
| The vibration generated during the operation of automobiles is influenced by shudder characteristics of sliding CVJs, such as induced thrust and slide resistance. At NTN, we have developed epoch-making, tripod-type sliding CVJs that boast the world's largest operating angle of 30° and decrease the shudder value by 50% or more, compared with conventional, low-vibration CVJs. We also offer a diverse lineup to make these joints applicable for an even greater array of automobiles. |
| By effectively employing our advanced low-vibration technology, NTN is further enhancing products that greatly improve each vehicle's NVH (noise, vibration, and harshness). |
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| Designed to Bear The Unbearable |
| Spherical roller bearings are dedicated to extremely severe applications and must support high loads, severe misalignment, contaminated environments, shocks, and vibrations. And with the industry’s highest load rating and production coming from a factory near you, there’s no reason to look anywhere else for spherical roller bearings. |
| The Industry’s Highest Load Rating |
| NTN-SNR sphericals feature the industry’s highest load rating: a full 18% higher than a standard spherical roller bearing. This level of quality means at least a 75% extension of service life. The performance of these sphericals is achieved through the use of very high quality raw materials and optimized rolling element geometry. The unique design also leads to: |
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• Reduced friction torque (as much as 30% less), offering lower operating temperature, with lower power and lubricant consumption. • Appreciably increased operating speed, allowing an extended scope of applications. • High temperature capacity of up to 200°C (392°F) for metallic cage bearings. Dimensional stability is ensured by a specific heat treatment. • A +/- 0.5° misalignment capability, without reducing the load capacity, and up to 1° 30’ in case of low loads. |
| NTN Spherical Roller Bearings: Right in Front of You All Along |
| Industria Cuscinetti S.P.A. (ISCA) is an Italian bearing factory that was set up as a joint venture between four bearing manufacturers, including NTN and our SNR partner brand. NTN and SNR are the majority user of ISCA’s capacity and sells the largest share of the plant’s production. That means that, even if you’ve been using spherical roller bearings from some of our competitors, it could be the same bearing made in the same plant and same equipment as what NTN offers. |
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