Bearings Environmentally friendly Bearings offer high performance in water- and dust-contaminated environments. Enhanced strength makes these ever-evolving bearings ideal for high-speed.
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
2. Bearing Model Numbers 2.1 Combination of model numbers 2.3 2.3.1 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 Outside Width dimension Cr C r (minimum) 2137L12CAM 35 8 21 1.5 71 76 2138L11ACAM 4 9 23 1.5 82 93 2238L11CAM 4 9 33 1.5 122 129 2229L11CAM 45 85 23 1.1 78 88 625L11DDU Deep groove ball bearings 61L11-H-2DDU Stainless-steel bearing 625L12DDU Tapered roller bearings HR3224XJL11 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. 2239L12CAM 45 1 36 1.5 148 167 2221L11CAM 5 9 23 1.1 82 93 22311L12CAM 55 12 43 2 29 241 22212L12CAM 6 11 28 1.5 127 154 22213L11CAM 65 12 31 1.5 152 19 22313L11CAM 65 14 48 2.1 265 315 22313L12CAM 65 14 48 2.1 265 315 22214L11CAM 7 125 31 1.5 163 25 22315L12CAM 75 16 55 2.1 34 415 22216L11CAM 8 14 33 2 181 232 22217L12CAM 85 15 36 2 215 276 22218L12CAM 9 16 4 2 256 34 22219L12CAM 95 17 43 2.1 296 395 2312L11CAM 1 165 52 2 345 53 2232L11CAM 1 215 73 3 6 785 22222L12CAM 11 2 53 2.1 425 585 2324L11CAM 12 18 46 2 315 525 23124L12CAM 12 2 62 2 465 72 22226L11CAM 13 23 64 3 565 815 23932L11CAM 16 22 45 2 36 675 Note (L12) Remarks: The above table lists examples of available bearing numbers for the bearing. Consult with NSK for information about other 3 4
2.3.2 Deep groove ball bearings Bearings Deep groove ball bearings Deep groove ball bearings Bearing steel Stainless steel Sealed type Outside dimension (minimum) 69L11 DD1 1 22 6.3 2 7 1 27 6L11 DD 1 26 8.3 4 55 1 97 62L11 DDU 1 3 9.6 5 1 2 39 691L11 DD1 12 24 6.3 2 89 1 46 61L11 DDU 12 28 8.3 5 1 2 37 621L11 DDU 12 32 1.6 6 8 3 5 692L11 DD1 15 28 7.3 4 35 2 26 62L11 DDU 15 32 9.3 5 6 2 83 622L11 DDU 15 35 11.6 7 65 3 75 63L11 DDU 17 35 1.3 6 3 25 623L11 DDU 17 4 12.6 9 55 4 8 64L11 DDU 2 42 12.6 9 4 5 624L11 DDU 2 47 14 1 12 8 6 6 65L11 DDU 25 47 12.6 1 1 5 85 625L11 DDU 25 52 15 1 14 7 85 635L11 DDU 25 62 17 1.1 2 6 11 2 66L11 DDU 3 55 13 1 13 2 8 3 626L11 DDU 3 62 16 1 19 5 11 3 636L11 DDU 3 72 19 1.1 26 7 15 67L11 DDU 35 62 14 1 16 1 3 627L11 DDU 35 72 17 1.1 25 7 15 3 637L11 DDU 35 8 21 1.5 33 5 19 2 68L11 DDU 4 68 15 1 16 8 11 5 628L11 DDU 4 8 18 1.1 29 1 17 9 638L11 DDU 4 9 23 1.5 4 5 24 69L11 DDU 45 75 16 1 2 9 15 2 629L11 DDU 45 85 19 1.1 31 5 2 4 639L11 DDU 45 1 25 1.5 53 32 61L11 DDU 5 8 16 1 21 8 16 6 621L11 DDU 5 9 2 1.1 35 23 2 631L11 DDU 5 11 27 2 62 38 5 Remarks 1. The above table lists examples of available bearing numbers for the bearing. Consult with NSK for information about other 2. Not applicable to deep groove ball bearing with plastic cages. Width Cr C r Sealed type 69L11-H-2 DD1 1 22 6.3 2 29 1 2 6L11-H-2 DD 1 26 8.3 3 9 1 58 62L11-H-2 DDU 1 3 9.6 4 35 1 91 691L11-H-2 DD1 12 24 6.3 2 46 1 17 61L11-H-2 DDU 12 28 8.3 4 35 1 89 621L11-H-2 DDU 12 32 1.6 5 8 2 44 692L11-H-2 DD1 15 28 7.3 3 7 1 81 62L11-H-2 DDU 15 32 9.3 4 75 2 27 622L11-H-2 DDU 15 35 11.6 6 5 2 98 63L11-H-2 DDU 17 35 1.3 5 1 2 6 623L11-H-2 DDU 17 4 12.6 8 15 3 85 64L11-H-2 DDU 2 42 12.6 7 95 4 624L11-H-2 DDU 2 47 14 1 1 9 5 25 65L11-H-2 DDU 25 47 12.6 8 55 4 65 625L11-H-2 DDU 25 52 15 1 11 9 6 3 66L11-H-2 DDU 3 55 13 1 11 3 6 6 5 6 Outside Width dimension (minimum) Tapered roller bearing dimension Inner ring (minimum) Remarks 1. The above table lists examples of available bearing numbers for the bearing. Consult with NSK for information about other 2. Not applicable to deep groove ball bearing with plastic cages. 2.3.3 Tapered Roller Bearing Outside Width dimension Outer ring (minimum) HR328JL11 4 8 19.75 1.5 1.5 63 5 7 HR3228JL11 4 8 24.75 1.5 1.5 77 9 5 HR321XJL11 5 8 2 1 1 61 87 HR321JL11 5 9 21.75 1.5 1.5 76 91 5 HR3221JL11 5 9 24.75 1.5 1.5 87 5 19 HR331JL11 5 11 29.25 2 2.5 13 148 HR3211XJL11 55 9 23 1.5 1.5 81 5 117 HR32211JL11 55 1 26.75 1.5 2 11 137 HR32912JL11 6 85 17 1 1 49 84 5 HR32212JL11 6 11 29.75 1.5 2 131 167 HR3213XJL11 65 1 23 1.5 1.5 86 5 132 HR3213JL11 65 12 24.75 1.5 2 122 151 HR32213JL11 65 12 32.75 1.5 2 157 22 HR3216JL11 8 14 28.25 2 2.5 157 195 HR3218XJL11 9 14 32 1.5 2 17 273 HR3224XJL11 12 18 38 2 2.5 242 45 Remarks: The above table lists examples of available bearing numbers for the bearing. Consult with NSK for information about other Cr Cr C r C r
3. Bearing Types and Availability 3.1 Available Bearing type, cage type, limiting speed, and size (outside, mm) Bearing types types Cage types s Deep groove ball bearings Tapered roller bearings (L11) (L12) (L11) (L12) (L11) = (Bearing bore, mm + Bearing outside, 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, mm) Machined brass (CA) Less than 6 7 OD 25 Pressed steel (EA) Less than 3 7 OD 215 Machined brass (CA) 6 1 7 OD 215 Pressed steel Less than 15 19 OD 25 Pressed steel 15 2 19 OD 215 Pressed steel Less than 4 8 OD 215 c. Deep groove ball bearings d. Tapered roller bearings 3 25 2 15 1 5 6 5 4 3 2 1 2 4 6 8 68 14 14 176 2 4 6 8 68 14 14 176 Bearings L11 Applicable range L12 Applicable range L12 Intermittent applicable range L11 Applicable range 12 1 8 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) 6 4 2 1 8 2 4 6 8 68 14 14 176 Precautions for Selecting The following precautions should be considered to maintain the high performance of Bearings: For low-temperature and low-speed applications, Bearings for general use (L11) are recommended. b. Spherical roller bearings (EA) 6 4 2 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. 2 4 6 8 68 14 14 176 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
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 98 N 245 N 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 2 5 2 5 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 4 3 2 1 Stable Grease Deep groove ball bearings (635DDU) Test conditions Rotational speed: 1 2 min 1 Radial load: 29.4 N Axial load: 29.4 N s (22311CAM) Test conditions Rotational speed: 8 min 1 Radial load: 2 744 N Axial load: 294 N Stable Stable Stable Stable Stable for general use for high-speed Grease for general use for high-speed 4.1.1 Environment where exposed to water cleaning equipment is assumed Test conditions Test bearings Rotational speed 1 min 1 Radial load Axial load 6-H-DD (stainless steel with contact seal) 79.4 N 29.4 N 4.1.2 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 79.4 N Axial load 29.4 N 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
CAT. No. E1216d 211 C-8 Printed in Japan NSK Ltd. 22