NTN Corporation responds to changing technologies with bearings for special environments.

1-1 Product series for special environments

NTN Corporation offers a variety of products for use in special situations: in vacuum environments, where cleanliness is an important factor, and, where corrosive elements are present. The product range includes rolling element bearings, bearing units, ball screws, sliding screws and sliding bearings.

<Features>	A special PTFE coating makes the line suitable for an environment demanding low dust generation, both air and vacuum. When composed of plastic materials they may be used in corrosive environments.
<Applications>	Aerospace equipment Manufacture of semiconductors	Vacuum equipment components General industrial machinery

NTN products contribute to a more compact application with a longer operating life.

1-2 Bearings with solid lubricant

These bearings feature a thermohardened solid lubricant, combining the unique properties of plastic and grease, that lubricates the bearing, prevents deterioration caused by moisture or dirt, adheres to the bearing components and prevents leakage.

<Features>
High grease retention for extended period of time.
Low lubricant leakage.
Available in full- or spot-pack: full-pack for higher speeds, spot-pack offers lower torque.
Operating temperature of -20°C to 120°C (100°C when in continuous operation) for high temperature type (deep groove ball bearings or bearing units).
Available in stainless steel series model 14: bore range 10 - 30mm (deep groove ball bearings).

<Applications>
Outdoor machinery, or where bearing maintenance is difficult.
For machinery subject to heavy vibration or centrifugal force.
When grease elimination must not occur (printing, food processing).

1-3 Angle sensor unit with high rigidity and accuracy

These angle sensor units are highly accurate and offer satisfactory load capacity and water resistance. The units incorporate new technologies for bearings and potentiometers.

<Features>	High rigidity which accepts 100 G impact loads. High accuracy with a single linearity within ± 0.5%. The units cleared the water resistance test; JIS D 02023.
<Applications>	For machinery used in demanding environments, such as construction machinery.

Sealed self-aligning roller bearings

1-4 Sealed self-aligning roller bearings

Favored by many industries for their large load capacity and multipurpose characteristics, this compactly designed, sealed self-aligning roller bearing has been developed to allow longer servicing intervals in dusty environments and to extend lubrication intervals.

<Features>
Effectively prevents infiltration of foreign matter.
Bearings can be assembled with a standard plummer block.
Greasing is possible even though the bearings are enclosed.

<Applications>
For raw material transfer conveyors at steel mills, cement factories, thermal power stations and mines.

1-5 Thin walled deep groove ball bearings

The deep groove ball bearing series has been expanded to add the 67 series. Compact and light weight, the thin wall 67 (6700 - 6706) series design extends the 68 series deep groove ball bearings.

Thinner wall than the 68 series.
NTN provides a non-contact seal type (LLF) in addition to the open type.
The dimension accuracy meets JIS Class 0 requirements.

1-6 Rubber/plastic molding type bearings

Urethane rubber is formed and cemented to the bearing's outside diameter; or, polyacetal or polyethylene plastic is molded or pressed directly to the bearing. Rubber and plastic molded bearings provide high accuracy, low vibration and low noise.

<Features>	Outer diameter oscillation highly controlled, making correct feeding possible. Plastic molding type can be designed to various external shapes.
<Applications>	Used in ATM and money changing machines' recognition and transfer (bills/cards) mechanisms. For recognition and transfer mechanisms of automatic vending machines. For transfer machine guide rings.

1-7 Angular ball bearings with ceramic balls for super high speed operation

These bearings present the super high revolution dn value, 2,100,000 (as dmn value; 2,600,000) using air-oil lubrication. Boundary dimensions are equal to the previous HSB series, but super high speed revolution using air-oil lubrication can be obtained. Bearings also operate under high acceleration conditions.

<Features>	The special design reduces the temperature rise and maintains its rigidity. Temperature rise in the inner ring is about 10°C lower than in other NTN products. Bearings also operate under high acceleration conditions (only 3 seconds to reach dn 2,100,000).
<Applications>	Machining tool spindles.

1-8 Adjustable preload bearing unit

Compact design of bearing units make high speed and rigidity possible. Pressurizing loads on the bearing can be changed in two to three steps according to the spindle rotation speed. It is possible to select a heavy-loading mode in the slow speed range, and the most suitable shaft rigidity for light-pressurizing and machining conditions in the high speed range. The grooved shaft design solved the rise of pressurization due to the compact design of the spindle and the expansion of the bearing inner ring at high speed revolutions.

<Features>	Constant position pressurization system with high rigidity. Compact design of spindle and good heat tolerance.
<Applications>	Suitable for spindles of various precision machining tools.

1-9 LH Spherical roller bearing series

Operable in a wider temperature range from normal temperature to higher temperatures (250°C).

Longer bearing life at normal to higher temperatures.
Highly resistant to surface damage.
Better dimensional stability at higher temperature.
More resistant to fatigue crack.

1-10 Products using HL rollers

The micro oil pot effect, based on the EHL theory, allows a longer operating life.

The improvement of rolling surface shape based on the micro EHL theory increases the oil film formation ability.
These bearings have longer operating lives than previous products, even under severe conditions.
Applicable not only to the rolling body (rollers) of bearings but also to the external circumference of guide roller outer rings.

1-11 A new series of cam followers

A broad line of cam followers for any condition is now available.

The cam followers with tap holes (tap holes for grease nipples located at stud ends) allow unrestricted maintenance access.
The 0.5 - 2mm eccentric rate of the stud on the shaft eccentric cam follower allows for easy installation and adjustment.
The compact design and high precision guide roller of the mini-size cam follower has a stud diameter of 3 - 5mm and an outer ring of 10 - 13mm

1-12 Non-separable thrust needle roller bearings

A thrust needle roller and cage assembly and a pressed steel bearing ring are integrated into a non-separable compact easy-to-handle bearing unit.

Inseparable cage-ring combination allows easy handling (simpler assembly work).
No need for grinding of a companion component ensures VA.
Optional special bearing ring design can enhance the amount of oil flowing through the bearing and provide error free bearing assembly work.


1-13 Large size, long operating life bearings (EA bearings)	1-14 Long life tapered roller bearings (ECO-Top bearings)	1-15 Long life deep grooved ball bearings (TAB bearings)

These bearings will achieve longer life even when the lubricant is contaminated. Developed using new technologies, these bearings significantly improve bearing operating life in dirty applications such as steel rolling mills and automotive transmissions. EA bearings are available in tapered, cylindrical and self-aligning roller bearings. ETA bearings are tapered roller bearings and TAB bearings are deep groove ball bearings.

<Features>	Special carbonization and nitriding treatments offer longer operating life. Operating life exceeds standard bearing life: performs more than twice as long in clean lubricant conditions and more than 5 times longer when lubricant is contaminated.
<Applications>	Automotive transmissions, where lubricant may experience contamination. Steel rolling and casting equipment subject to poor lubrication, vibration and frequent impact.

1-16 Insulated bearings (Plastic coated type)

Designed to prevent electrolytic corrosion, these bearings provide a long operating life. The insulating plastic coating (special PPS plastic) of the outer surface and side faces of the outer ring protect the bearing from external stray currents and prevent the electrolytic corrosion that frequently occurs on the main motor bearings of railway cars.

<Features>	High insulation. Compatible use with standard bearings.
<Applications>	For motor bearings and where the prevention of stray current flowing through the bearing is difficult.

1-17 Thrust cylindrical roller bearings with a pressed steel cage

The pressed steel cage is an economical choice for this thrust cylindrical roller bearing.

In comparison with standard bearings with an aluminum machined cage, the steel cage material is cheap and suitable for mass production.
The material, steel plate, permits various heat treatments and surface processes.
The wall thickness may be thinned, to stem width, allowing improved capacity ratings of the same dimension.

1-18 Super large-sized plummer block

This super large-sized plummer block (height of 2,150mm) is used to retain the tube dryer unit in steel mills.

<Boundary dimensions>	2,150 x 2,750 x 1,100 mm
<Bearing used>	240/1180BK30

1-19 Easy assembly/disassembly type flanges for constant velocity joints

The flange's design makes it easy and simple to connect and disconnect the joint -- even tools are unnecessary -- and it operates smoothly.

(Applied joint model numbers: #75 - #150)

1-20 Bearing units Stainless steel series

These stainless steel bearing units provide excellent corrosion resistance.

<Features>	The units combine a stainless steel housing and a stainless steel bearing with solid lubricant. Excellent corrosion resistance. Low lubricant leakage. Small rotation torque.
<Applications>	Food processing machines. Packaging machines. Textile machines.

1-21 Bearing units Plastic series

Light-weight bearing units with excellentcorrosion resistance and chemical resistance.

<Features>	The units combine a plastic housing and a stainless steel bearing with solid lubricant. Light weight (30 to 60% lighter than cast iron products from NTN). Excellent water and corrosion resistance. Low lubricant leakage. Small rotation torque.
<Applications>	Chemical machines Food processing machines. Packaging machines.

1-22 Bearing units Steel series

The steel housings provide rigidity, high load capacity and impact resistance.

<Features>	Rolled steel (SS400) is used for the general structure of the housing. Excellent impact resistance. Greater rigidity than with previous cast steel products. Insert bearing fits various housing types.
<Applications>	Steel industry equipment. Conveyors, trucks, etc.

NTN Bearings

Product Range