Deep groove ball bearings L12DDU. Polyolefin is used for packaging food in supermarkets, replacing dioxin-generating vinyl chloride.

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1 Bearings Environmentally friendly Bearings offer high performance in water- and dust-contaminated environments. Enhanced strength makes these ever-evolving bearings ideal for high-speed.

2 Bearings 22311L12CAM Deep groove ball bearings 1 626L12DDU 22311L11CAM Deep groove ball bearings 1 626L11DDU Deep groove ball bearings 1 6L11-H-2DD Tapered roller bearing HR3213XJL11 1 The bearings come with seals on both sides. Portion containing mostly polyolefin Polyolefin is used for packaging food in supermarkets, replacing dioxin-generating vinyl chloride. Close-up of 1 µm 1. Features of Bearings Excellent performance in water- and dust-contaminated 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. 2 Applications Steel mill equipment Paper mill equipment Environmentally friendly Because they can be lubricated with minute quantities of oil that exudes from, the bearings are able to minimize oil leakage. Liquid crystal display and semiconductor manufacturing equipment Agricultural machines Portion containing mostly lubricating oil Low torque Packing with after providing the bearing surface with special treatment realizes smooth rotation of rolling elements. Food processing equipment Cleaning equipment and lines The lubricating oil is mineral oil-based. Optimal composition and molding methods enable high-speed of Bearings Conveying equipment Bearings are lubricated with NSK s own oil-impregnated material,. consists of lubricating oil and polyolefin resin that has an affinity for oil. Oil slowly seeping from this material provides ample lubrication to the bearing for extended periods. Optimization of composition and molding method of improves strength and enables high-speed of Bearings. 2 Water and dust dramatically accelerate bearing damage. In order to realize stable, we recommend using seals to prevent water and dust from getting in the bearing. 1 2

3 2. Bearing Model Numbers 2.1 Combination of model numbers 2.3 Bearing numbers of delivered products s Bearings 625 L11 DDU (Example) L1 Basic bearing number Accessory symbols (for materials, cages, seals, etc.) Symbols of L11 is for general use, L12 is for high-speed. 2.2 Samples of model numbers Bearing types types Model numbers Remarks 22311L11CAM Machined brass cage s 22311L11EA Pressed steel cage 22311L12CAM Machined brass cage 625L11DDU Deep groove ball bearings 61L11-H-2DDU Stainless-steel bearing 625L12DDU Tapered roller bearings HR3224XJL11 Bearing numbers Bore diameter Boundary dimensions (mm) Basic load ratings (N) Chamfer Outside Width dimension Cr C diameter r (minimum) 2137L12CAM L11ACAM L11CAM L11CAM L12CAM L11CAM L12CAM L12CAM L11CAM L11CAM L12CAM L11CAM L12CAM Handling Precautions To maintain the excellent long-term lubricating capacity of Bearings, the following precautions should be observed: melts at about 12 C, therefore the bearings must not be heated over 1 C 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. The bearings also should not be used under conditions involving corrosive liquids or gases that can damage the parts of the bearing L11CAM L12CAM L12CAM L12CAM L11CAM L11CAM L12CAM L11CAM L12CAM L11CAM L11CAM Bearing numbers other than those given in the table can also be produced. 3 4

4 2.3.2 Deep groove ball bearings Bearings Deep groove ball bearings (bearing steel) Deep groove ball bearings (stainless steel) Bearing numbers Boundary dimensions (mm) Basic load ratings (N) Chamfer Shielded Sealed Bore Outside Width dimension type type diameter diameter Cr C r (minimum) 69L11 ZZ1 DD L11 ZZ DD L11 ZZ DDU L11 ZZ2 DD L11 ZZ DDU L11 ZZ DDU L11 ZZ1 DD L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU L11 ZZ DDU Bearing numbers other than those given in the table can also be produced. Not applicable to deep groove ball bearing with plastic cages. Bearing numbers Boundary dimensions (mm) Basic load ratings (N) Chamfer Shielded Sealed Bore Outside type type Width dimension diameter diameter (minimum) Cr C r 69L11-H-2 ZZ1 DD L11-H-2 ZZ DD L11-H-2 ZZ DDU L11-H-2 ZZ2 DD L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ1 DD L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU L11-H-2 ZZ DDU Bearing numbers other than those given in the table can also be produced. Not applicable to deep groove ball bearing with plastic cages. 5 6

5 3. Bearing Types and Availability 3.1 Available Bearing type, cage type, limiting speed, and size (outside diameter, mm) Bearing types types Cage types s Deep groove ball bearings Tapered roller bearings (L11) (L12) (L11) (L12) (L11) = (Bearing bore diameter, mm + Bearing outside diameter, mm) 2 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 consideration for tapered roller bearings. For tapered roller bearings and spherical roller bearings with pressed steel cages (EA), Bearings for high-speed (L12) are not available. For the application under the condition of low speed and low temperature, Bearings for general use (L11) are recommended. 3.2 and limiting speed () The relation between limiting speed and ambient temperature is as follows: Limiting speeds () Sizes (outside diameter, mm) Machined brass (CA) Less than 6 7 OD 25 Pressed steel (EA) Less than 3 7 OD 215 Machined brass (CA) OD 215 Pressed steel Less than OD 25 Pressed steel OD 215 Pressed steel Less than 4 8 OD 215 c. Deep groove ball bearings d. Tapered roller bearings Bearings L11 Applicable range L12 Applicable range L12 Intermittent applicable range L11 Applicable range L11 Applicable range L12 Applicable range L12 Intermittent applicable range Limiting speeds (d m n) 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. a. Spherical roller bearings (CA) Precautions for Selecting The following precautions should be considered to maintain the high performance of Bearings: b. Spherical roller bearings (EA) For low-temperature applications, Bearings for general use (L11) are recommended. For the condition of high ambient temperature, Bearings for high-speed (L12) are recommended. To rotate the bearings properly, it is necessary to apply the radial load. As a standard of the radial load, more than 1% of the basic dynamic load rating is recommended Since Bearings are lubricated by oil seeped from a, the bearings cannot be used under the condition where the bearings are exposed to water directly for an extended period of time (the oil could be washed away). If the application requires such exposure, consider using extra seals. 7 8

6 Bearings 4. Performance Test Bearings feature a number of excellent functions. Extensive test data and field results demonstrate the outstanding performance of Bearings. Fig. 1 Testing device under conditions of exposure to water Motor Connecting joints Spindle Shaft Water injector Cables Pulley 4.2 Durability performance test Slow seeping of the lubricant from provides excellent lubrication performance for extended periods. Bearings for general use cannot be used under conditions of high-speed rotation, but Bearings for high-speed perform with excellent durability under such conditions. Test conditions Test bearings Radial load Axial load 4.3 Bearing torque 635DDU 98N 245N ➀ 3 5 min 1 (: 152 ) Rotational speed ➁ 4 2 min 1 (: 183 ) ➂ 4 6 min 1 (: 2 ) Fig. 4 Durability test results of deep groove ball bearings Rotational speed, min 1 ➂ 4 6 (: 2 ) ➁ 4 2 (: 183 ) ➀ 3 5 (: 152 ) Aborted test after 2-hour torque increase Time, h for high-speed for general use Continuation after 2 -hour test Aborted test after 5-hour torque increase Aborted test after 5 -hour (Continuation of test is possible) Vibrometer Container Fig. 5 compares the torque of grease-lubricated bearings and Bearings. Fig. 5 Bearing torque comparison Note: The torque ratio is 1. when the bearing torque is a stable stage under grease lubrication. Plate Bearing Housing Weight 4.1 Durability test under conditions of exposure to water Grease lubrication allows for extended periods of time even if exposed to mist or submerged in water. Continuous with grease lubrication: approximately 2 days; with Bearings: 5 days or more Bearings can be operated for longer time than the bearings with grease lubrication even if exposed to mist or submerged in water. Torque ratio Stable Grease Deep groove ball bearings (635DDU) Test conditions Rotational speed: 1 2 min 1 Radial load: 29.4N Axial load: 29.4N s (22311CAM) Test conditions Rotational speed: 8 min 1 Radial load: 2 744N Axial load: 294N Stable Stable Stable Stable Stable for general use for high-speed Grease for general use for high-speed Environment where exposed to water cleaning equipment is assumed Test conditions Test bearings Rotational speed 1 min 1 Radial load 79.4N Axial load 29.4N 6-H-DD (stainless steel with contact seal) Environment of submerged condition under water vehicle and facilities are assumed 6-H-DD Test bearings (stainless steel with contact seal) Test Rotational speed 1 min 1 conditions Radial load 79.4N Axial load 29.4N Water exposure Spray pressure.8 cm 3 /min.2 MPa Fig. 2 Durability test results under exposing to water Fig. 3 Durability test results under submerged condition for general use for general use Grease lubrication Grease lubrication 5 1, 1,5 Time, h 5 1, 1,5 Time, h 9 1