MOLDED-OIL BEARINGS
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MOLDED-OIL BEARINGS

As one of the world’s leading manufacturers of rolling bearings, linear technology components and steering systems, we can be found on almost every continent – with production facilities, sales offices and technology centres – because our customers appreciate short decision-making channels, prompt deliveries and local service. Asia The Americas Oceania Africa The NSK company NSK commenced operations as the first Japanese manufacturer of rolling bearings back in 1916. Ever since, we have been continuously expanding and improving not only our product portfolio but also our range of services...

Partnership based on trust – and trust based on quality Total Quality by NSK: The synergies of our global network of NSK Technology Centres. Just one example of how we meet our requirements for high quality. NSK is one of the leading companies with a long tradition in patent applications for machine parts. In our worldwide research centres, we not only concentrate on the development of new technologies, but also on the continual improvement of quality based on the integrated technology platform of tribology, material technology, analysis and mechatronics. More about NSK at www.nskeurope.com...

Molded-Oil Bearings For general use For high-speed operation Close-up of Molded-Oil Portion containing mostly polyolefin Polyolefin is used for packaging food in supermarkets, replacing dioxin-generating vinyl chloride. Portion containing mostly lubricating oil The lubricating oil is mineral oil-based. 100 µm

Molded-Oil Bearings are lubricated with NSK’s own oil-impregnated material – Molded-Oil – which consists of lubricating oil and polyolefin resin that has an affinity for oil. Lubricant slowly seeping from this material provides ample lubrication to the bearing for extended periods. Features of Molded-Oil Bearings › Excellent performance in water- and dustcontaminated environments The bearings are designed to prevent liquids such as water (which can wash the lubricating oil out) and dust from getting inside the bearings. Sealed types can be used in environments exposed to water and dust.* ›...

Molded-Oil Bearings Spherical roller bearing 22311L12CAM › For high-speed operation Deep groove ball bearings* 6206L12DDU › For high-speed operation Spherical roller bearing 22311L11CAM › For general use

Deep groove ball bearings* 6206L11DDU › For general use Deep groove ball bearings* 6000L11-H-20DD › For general use Tapered roller bearing HR32013XJL11 › For general use * The bearings come with seals on both sides. MOLDED-OIL BEARING

Bearing Model Numbers Handling Precautions To maintain the excellent long-term lubricating capacity of Molded-Oil Bearings, the following precautions should be observed: › Molded-Oil melts at about 120ºC, therefore the bearings must not be heated over 100ºC by using an induction heater. Additionally, the bearings should not be heated by the oil bath method. › The bearings should not be used under conditions involving liquid degreasing agents such as organic solvents that can affect Moded-Oil. The bearings also should not be used under conditions involving corrosive liquids or gases that can...

Spherical roller bearings Boundary dimensions (mm) Bearing numbers Basic load ratings (N) Chamfer dimension (min.) Molded-Oil Type*

Deep groove ball bearings Bearing Steel Bearing numbers Basic load ratings (N) Shielded type Sealed type Bore diameter Outside diameter * = For general use, = For high-speed operation Note: Bearing numbers other than those given in the table can also be produced. Not applicable to deep groove ball bearing with plastic cages. Molded-Oil Type*

Deep groove ball bearings Stainless Steel Bearing numbers Sealed type Bore diameter Basic load ratings (N) Outside diameter Molded-Oil Type* * = For general use, = For high-speed operation Note: Bearing numbers other than those given in the table can also be produced. Not applicable to deep groove ball bearing with plastic cages.

Bearing Types and Availability Available Molded-Oil Bearing type, cage type, limiting speed, and size (outside diameter, mm) Cage types Sizes (outside diameter, mm) Pressed steel Pressed steel Bearing types Pressed steel Molded-Oil types For general use (L11) Spherical roller bearings Deep groove ball bearings Tapered roller bearings › dmn = [(Bearing bore diameter, mm + Bearing outside diameter, mm) ÷ 2] x inner ring rotational speed, min–1 › Some large spherical roller bearing numbers may not be available › Conditions including abutment and fillet dimensions must be taken into...

Ambient temperature and limiting speed (dmn) The relation between limiting speed and ambient temperature is as follows: c. Deep groove ball bearings d. Tapered roller bearings 50,000 L12 Intermittent operation applicable range Limiting speeds (dmn) of “a” to “d” shown above are examples for general housing. If there is a source of heat near the bearings, or the cooling effect by the radiation or the heat transmission, the above limiting speed cannot be expected due to the application. Precautions for Selecting The following precautions should be considered to maintain the high performance...

Performance Test Molded-Oil Bearings feature a number of excellent functions. Extensive test data and field results demonstrate the outstanding performance of Molded-Oil Bearings. Durability test under conditions of exposure to water Grease lubrication allows operation for extended periods of time even if exposed to mist or submerged in water. Continuous operation with grease lubrication: approximately 20 days; with Molded-Oil Bearings: 50 days or more MoldedOil Bearings can be operated for longer time than the bearings with grease lubrication even if exposed to mist or submerged in water....

Durability performance test Slow seeping of the lubricant from Molded-Oil provides excellent lubrication performance for extended periods. Molded-Oil Bearings for general use cannot be used under conditions of high-speed rotation, but Molded-Oil Bearings for high-speed operation perform with excellent durability under such conditions. Durability performance test Test bearings Radial load Axial load Rotational speed Fig. 4 Durability test results of deep groove ball bearings Continuation after 2 000-hour test Molded-Oil for high-speed operation Aborted test after 200-hour torque increase...