Selection of DODGE and Stainless Steel Housed Ball Bearings DODGE ball bearings are primarily designed for radial loading. However, they have the capacity to carry thrust loads and combined radial/thrust loads. The maximum recommended load which can be applied is limited by various components in the system, such as bearing, housing, shaft attachments, speed and life requirements as listed in this catalog and the instruction manual that accompanies each bearing. DODGE ball bearings have been applied successfully when these limits have been exceeded under controlled operating conditions. Contact DODGE Engineering, 864-28-295, for applications which exceed these recommendations. Select a bearing from the Selection table that has a radial load rating at the operating speed equal to or greater than the calculated Equivalent Radial load for a desired L life. (Table 2 for English shaft sizes and Table 3 for metric shaft sizes) This simple method is all that is required for the majority of general applications and provides for occasional average shock loads. L Hours Life-is the life which may be expected for at least 9% of a given group of bearings operating under identical conditions. F Heavy Service-For heavy shock loads, frequent shock loads or severe vibrations, add up to 5% (according to severity of conditions) to the Equivalent Radial Load to obtain a Modified Equivalent Radial Load. Consult Application Engineering for additional selection assistance. A maximum thrust load value of C/ is recommended as a guide for general applications and will give adequate L life. If the thrust load exceeds this limit, it is advisable to use auxiliary thrust carrying devices, such as a shaft shoulder, snap ring, or a thrust collar. Where substantial radial load pulls the housing away from the mounting base, both the hold-down bolts and housing must be of adequate strength. Auxiliary load carrying devices, such as sheer bars, are advisable for side or end-loading of pillow blocks and radial loads for flange units. To determine the L hours life for loads and RPM s not listed use the following equation: C 3 L = ( ) 6667 P x RPM Where: L = Life, hours C = Dynamic Capacity, lbs. or N P = Equivalent Radial Load, lbs. or N RPM = Revolution per minute When the load on a ball bearing is solely a radial load with no thrust (axial) load, the Equivalent Radial Load (P) is equal to the actual radial load. However, when a thrust (axial) load is applied, the radial and thrust loads applied must be converted into an Equivalent Radial Load. The use of the X (radial factor) and Y (thrust factor) from Table convert the actual applied thrust and radial loads to an Equivalent Radial Load which has the same effect on the life of a bearing as a radial load of this magnitude. P = (X x F R ) + (Y x F A ) Where: P = Equivalent Radial Load, lbs. F R = Radial load, lbs. F A = Thrust load, lbs. e = Thrust load to radial load factor (Table ) X = Radial load factor (Table ) Y = Thrust Factor (Table ) C O = Basic static capacity (Table 2 or 3) To find X and Y, first calculate F A /C O to determine e. Calculate F A / F R and compare to e to determine the X and Y factors to use from Table. Substitute all known values into the Equivalent Radial Load equation. The Equivalent Radial loads (P) thus determined can be used in the L life formula or compared to the allowable Equivalent Radial Load rating desired in the expanded rating chart to select a bearing (Table 2). If calculated value of P is less than F R, use P=F R. Table F A C o.4.2.28.42.56.7.84..7.28.42.56 e.9.2.22.24.26.27.28.3.34.38.42.44 Radial/Thrust Factors If F A /F R is equal to or less than e If F A /F R is greater than e F A /F R e F A /F R > e X Y X Y Lubrication - DODGE Ball Bearings are lubricated at the factory and are ready to run. The bearings are initially lubricated with Chevron FM EP2 H Food Grade and should be relubricated with the same or some equivalent. For high speeds, high loads, extreme temperatures and other abnormal operating conditions, special greases may be required. Contact DODGE Application Engineering for recommendations on these types of applications. Misalignment - DODGE Ball Bearings are designed to allow a maximum of 2 static misalignment. These bearings are not suitable for dynamic misalignment. To ensure good alignment, mounting surfaces must be checked for flatness and must lie in the same plane. When tightening base bolts, each bolt should be alternately tightening in incremental torque values until full torque is achieved to prevent the angular shifting of the pillow block that occurs when one bolt is tightened to its full torque. Shimming may be required to minimize misalignment. Shaft Tolerances Normal Shaft Size Inches Recommended Shaft Tolerances SC & D-LOK Products (Inches) Recommended Shaft Tolerances GRIP TIGHT Ball Bearings Inches Up to -/2 +. -.5 +. -.2 Over -/2 to 2 +. -. +. -..3.56.56.56.56.56.56.56.56.56.56.56.56 2.3 2.5.99.85.7.63.55.45.3.5.4. PAGE B-2 PAGE B-4 B-5 PAGE B-88 PAGE B-9
EASY SELECTION Table 2 - Easy Selection For And Stainless Steel Housed Ball Bearing Mounted Bearings - Inch RING SIZE SHAFT SIZE DYNAMIC CAPACITY C,lbs. PAGE B-2 STATIC CAPACITY C,LBS 24 3/4 2899 39 25 26 27 7/8 5/6 -/8-3/6 -/4 -/4-3/8-7/6 346 565 4368 225 5759 365 28 -/2 7332 45 29 2-5/8 -/6-374 -5/6 2 789 445 789 445 L LIFE HOURS ALLOWABLE EQUIVALENT RADIAL LOAD RATINGS (lbs) AT VARIOUS RPM* 5 5 25 5 75 5 75 2 25 3 35 45 5 55 75 95 2 2 74 55 435 345 3 275 24 225 25 2 9 8 65 6 55 4 29 23 9 3 645 45 38 3 26 24 2 2 9 75 65 55 45 4 35 2 3 7 4 4 59 4 345 275 24 25 9 8 7 6 5 45 3 25 25 2 97 95 6 55 355 3 24 2 9 65 55 5 4 3 25 5 5 95 89 85 83 435 3 255 2 75 6 4 3 25 5 5 9 95 9 8 75 72 7 2 85 56 47 375 325 295 26 245 235 22 25 95 8 75 7 5 4 33 29 3 75 485 4 325 285 26 225 25 25 9 8 7 55 5 45 3 22 6 3 4 64 445 375 295 26 235 25 95 85 75 65 55 4 35 35 2 6 3 6 56 385 325 26 225 25 8 7 65 5 4 35 25 2 5 5 97 92 9 47 325 275 22 9 75 5 45 35 25 2 5 95 9 82 78 76 2 5 775 655 52 455 4 36 34 325 35 285 27 25 24 235 2 94 85 3 975 675 57 455 395 36 35 3 285 265 25 235 22 2 25 83 7 6 4 885 65 52 4 36 325 285 27 26 24 225 25 2 9 85 67 54 47 6 775 535 455 36 35 285 25 235 225 2 2 9 75 65 6 46 35 28 655 455 38 35 265 24 2 2 9 75 65 6 45 4 35 23 3 8 2 475 2 86 685 595 545 475 45 43 4 375 355 33 35 35 279 256 3 285 89 755 595 52 475 45 395 375 35 33 3 285 275 27 242 224 4 7 8 685 545 475 43 375 355 34 35 3 285 26 25 245 22 23 6 2 7 595 475 45 375 33 3 3 275 26 25 23 22 25 92 77 86 595 55 4 35 35 275 265 25 235 22 2 9 85 8 62 5 2 875 3 95 87 76 69 65 575 55 5 48 455 42 45 392 352 3 64 35 96 76 665 65 525 5 48 445 42 4 365 355 342 38 4 49 3 87 69 65 55 48 455 435 45 38 36 33 32 3 28 6 3 9 76 65 525 48 42 4 38 355 33 35 29 28 27 244 95 76 64 5 445 45 355 335 32 3 28 265 245 235 229 26 2 22 4 8 935 82 745 65 65 59 55 55 49 45 435 42 379 3 765 225 3 82 75 65 57 54 55 48 45 43 395 38 367 33 4 6 935 745 65 59 55 49 47 435 4 39 36 345 334 3 6 4 97 82 65 57 55 45 43 4 38 36 34 3 3 292 263 8 82 69 55 48 435 38 36 345 32 3 285 265 255 247 222 2 22 4 8 935 82 745 65 65 59 55 55 49 45 434 42 3 765 225 3 82 75 65 57 54 55 48 45 43 395 379 367 4 6 935 745 65 59 55 49 47 435 4 39 36 345 334 6 4 97 82 65 57 55 45 43 4 38 36 34 3 3 292 8 82 69 55 48 435 38 36 345 32 3 285 265 254 247 *SLIGHT INTERFERENCE FIT REQUIRED WHEN OPERATING TO THE RIGHT OF THE HEAVY LINE OR IN THE SHADED AREA. FOR SC PRODUCT ONLY, OR USE D-LOK OR GT PRODUCTS Note: Because the allowable loads - especially at low speeds - are extremely high, be sure the shaft strength is adequate and the pillow blocks are base loaded. When imposed load is horizontal, be sure hold-down bolts are adequate. If bearings are cap loaded, full details on load, speed, and shaft size should be referred to DODGW Application Engineering. Use GT with labyrinth seals when operating right of heavy line PAGE B-4 B-6 PAGE B-88 PAGE B-9
Table 3 - Easy Selection For And Stainless Steel Housed Ball Bearing Mounted Bearings - Metric RING SIZE SHAFT SIZE DYNAMIC CAPACITY C, N STATIC CAPACITY C, N 24 2mm 2895 683 25 25mm 3993 696 26 3mm 9429 8 27 35mm 2566 3633 28 4mm 3263 784 29 45mm 3599 9794 2 5mm 3599 9794 L LIFE HOURS ALLOWABLE EQUIVALENT RADIAL LOAD RATINGS (N) AT VARIOUS RPM* 5 5 25 5 75 5 75 2 25 3 35 45 5 55 75 95 2 2 3292 229 935 535 334 223 68 956 89 845 8 734 72 689 623 574 547 529 3 2869 22 69 334 56 68 934 89 845 778 734 689 645 623 6 534 53 476 463 4 2624 824 535 223 68 956 845 8 756 72 667 645 578 556 556 489 454 43 423 6 229 579 334 68 934 845 734 689 667 623 578 556 52 489 467 423 396 378 369 935 334 34 89 778 72 623 578 556 52 489 467 4 423 4 356 334 32 3 2 358 249 29 668 446 32 56 9 45 979 92 867 8 778 756 667 622 592 574 3 336 257 824 446 268 56 956 92 845 8 756 689 667 645 578 542 56 53 4 2847 979 668 32 56 45 92 867 823 778 734 689 623 6 6 534 494 472 458 6 249 72 446 56 92 8 756 734 667 623 6 556 534 52 467 43 49 4 29 446 223 979 845 778 667 645 6 556 534 52 467 445 445 4 365 347 338 2 496 3447 293 233 224 824 6 52 446 357 268 2 2 68 45 934 862 823 3 4337 32 2535 224 757 6 4 334 268 79 2 45 979 934 92 84 756 76 4 3936 2736 233 824 6 446 268 2 56 68 956 89 845 823 743 685 654 6 3447 238 224 6 4 268 2 45 934 89 845 778 734 72 649 6 569 293 224 69 357 79 68 934 89 845 778 734 72 645 623 6 547 53 48 2 656 4537 3825 347 2647 2424 23 22 93 779 668 579 468 4 357 232 39 3 576 3959 3358 2647 233 23 846 757 668 557 468 379 268 223 2 76 996 4 524 363 347 2424 23 93 668 579 52 4 334 268 56 2 9 978 93 6 4537 358 2647 23 846 668 468 379 334 223 56 2 23 979 956 854 787 3825 2647 2246 779 557 4 223 79 2 45 979 934 845 823 8 72 667 2 834 5782 487 387 338 369 269 2558 2446 2268 235 224 868 8 744 565 3 7295 548 427 338 2958 269 2335 2224 235 979 868 779 624 579 52 37 4 6628 458 387 369 269 2446 235 224 935 8 69 6 468 423 378 245 6 5782 43 338 269 2335 235 868 779 69 579 468 4 29 245 2 85 487 338 2847 2268 979 8 579 49 423 334 245 79 9 45 8 96 2 8985 6227 5249 459 3647 334 289 2736 2624 2446 229 28 22 935 868 686 3 785 5449 458 3647 38 289 2535 242 229 235 22 93 757 69 632 472 4 77 4937 459 334 289 2624 229 28 29 935 824 735 6 535 486 339 6 6227 435 3647 289 2535 229 22 93 824 69 6 52 379 334 299 7 5249 3647 369 2446 235 935 69 6 535 423 334 268 79 34 99 988 2 8985 6227 5249 459 3647 334 289 2736 2624 2446 229 28 22 93 868 3 785 5449 458 3647 38 289 2535 242 229 235 22 93 757 686 632 4 77 4937 459 334 289 2624 229 28 29 935 824 735 6 535 486 6 6227 435 3647 289 2535 229 22 93 824 69 6 52 379 339 299 5249 3647 369 2446 235 935 69 6 535 423 334 268 79 3 99 *SLIGHT INTERFERENCE FIT REQUIRED WHEN OPERATING TO THE RIGHT OF THE HEAVY LINE OR IN THE SHADED AREA. FOR SC PRODUCT ONLY, OR USE D-LOK OR GT PRODUCTS Note: Because the allowable loads - especially at low speeds - are extremely high, be sure the shaft strength is adequate and the pillow blocks are base loaded. When imposed load is horizontal, be sure hold-down bolts are adequate. If bearings are cap loaded, full details on load, speed, and shaft size should be referred to DODGW Application Engineering. Use GT with labyrinth seals when operating right of heavy line PAGE B-2 PAGE B-4 B-7 PAGE B-88 PAGE B-9
EASY SELECTION Table 4 - Easy Selection For -Housed Sleeve Bearing Mounted Units - Inch RADIAL LOAD RATINGS (LBS) AT VARIOUS REVOLUTIONS PER MINUTE (RPM) Shaft Series Up To 25 5 75 5 2 25 Size 24 3/4 45 4 375 3 23 75 9 25 6 55 45 25 235 75 9 26 RADIAL LOAD RATINGS (LBS) AT VARIOUS REVOLUTIONS PER MINUTE (RPM) Shaft Series 3 35 4 45 5 55 6 65 Size PAGE B-2-3/6 -/4 9 8 5 325 25 75 9 27 -/4-7/6 9 6 4 3 75 2 95 28 -/2 4 2 7 43 32 8 25 95 29 -/6-3/4 6 4 725 435 335 8 25 95 2-5/6 8 6 75 45 35 85 3 24 3/4 6 5 45 4 35 25 2 5 25 6 5 45 4 35 25 2 5 26 27-3/6 -/4 -/4-7/6 65 6 5 4 35 3 25 2 7 65 55 45 4 35 3 28 -/2 7 65 55 45 4 35 29 -/6-3/4 7 65 55 45 4 2-5/6 8 7 6 5 45 Continuous operating temperature: -4 to 8 F PAGE B-4 B-8 PAGE B-88 PAGE B-9
Table 5 - Easy Selection For -Housed Sleeve Bearing Mounted Units - Metric RADIAL LOAD RATINGS (NEWTONS) AT VARIOUS REVOLUTIONS PER MINUTE (RPM) Shaft Series Up To 25 5 75 5 2 25 Size 24 2 2 775 665 33 2 775 485 4 25 25 2665 2445 2 4 45 775 485 4 26 3 4 3555 222 445 775 485 4 27 35 4445 4 2665 775 33 775 53 42 28 4 6225 5335 3 9 42 8 555 42 29 45 75 6225 322 93 49 8 555 42 2 5 85 75 3335 2 555 82 575 44 RADIAL LOAD RATINGS (NEWTONS) AT VARIOUS REVOLUTIONS PER MINUTE (RPM) Shaft Series 3 35 4 45 5 55 6 65 Size 24 2 265 22 2 75 55 85 65 25 25 265 22 2 75 55 85 65 26 3 285 265 22 75 55 3 85 27 35 3 285 24 2 75 55 3 28 4 3 285 24 2 75 55 29 45 3 285 24 2 75 2 5 355 3 265 22 2 Continuous operating temperature: -4 to 82 C PAGE B-2 PAGE B-4 B-9 PAGE B-88 PAGE B-9
EASY SELECTION POLYMER HOUSINGS General Resistance to Chemical Groups at Room Temperature (2 C/68 F) Chemical Group Condition Or Subgroup Resistance Inorganic Acids concentrated - (non-oxidizing) diluted (:) +. highly diluted +. Inorganic Acids concentrated - (oxidizing) diluted (:) - highly diluted + Organic Acids concentrated = diluted (:) + highly diluted + Bases concentrated - diluted (:) - highly diluted = Salt Solutions acidic + neutral + basic = Aliphatic Hydrocarbons + oils and greases + Aromatic Hydrocarbons = phenols - Halogenated Hydrocarbons perhalogenated + partially halogenated - Alcohols monovalent + polyvalent = Ketones = Esters = Ethers + () except hydrofluoric acid (+) excellent resistance ( = ) good-fair resistance ( - ) fair-poor resistance ( blank ) no data available PAGE B-2 PAGE B-4 B- PAGE B-88 PAGE B-9
CHEMICAL RESISTANCE CHART Chemical Agent Solution Conc. @ 23 C (73 F) @ 6 C (4 F) @ 8 C (75 F) A Acetic Acid 5% + + = = Acetic Acid % + = = Acetic Acid 2% = - = - = Acetic Acid 8% = - = - = Acetic Acid % = = = Acetone = = Ammonium Chloride % + + Ammonium Hydroxide % = - Ammonium Hydroxide conc. - Aniline + = = B Benzene = = = = Bleaching Lye + + Brake Fluid + + + + + Butane + Butanol = = Butyl Acetate + = C Calcium Chloride 5% + + + Calcium Chloride % + + Calcium Hydroxide % + + Calcium Hypochlorite + + Carbon Disulphide + Carbon Tetrachloride + + Castor Oil + Chloroform - Chromic Acid 4% + - - Citric Acid % + + + Cottonseed Oil + + + Cresol - - - D Detergents % + + = - Detergents 25% + + = - Dibutyl Phthalate + + Diesel Oil + Dioxane + = - = E Ethanol + = Ether (diethyl-) + Ethyl Acetate = = Ethylene Dichloride - ( + ) excellent resistance ( = ) good-fair resistance ( - ) fair-poor resistance ( blank ) no data available PAGE B-2 PAGE B-4 B- PAGE B-88 PAGE B-9
EASY SELECTION CHEMICAL RESISTANCE CHART Chemical Agent F Ferrous Chloride 5% + Formic Acid 5% + = + Formic Acid 9% = - - Freon + G Gasoline + + Glycerol (Glycerin) = = Glycol = = Grease + + + + + H Heptane + Hexane + + + Hydrochloric Acid % + - = - - Hydrochloric Acid 9% - - - - - Hydrofluoric Acid 5% - - - Hydrofluoric Acid 5% - - - Hydrogen Peroxide 3% + + Hydrogen Peroxide 3% = + IJ Isoamyle Alcohol = = Isopropanol = = KL Kerosene + + + Lithium Chloride 43% + + M Methanol + = = Methylene Chloride - + - Methyl Ethyl Ketone + + = + Methyl Salicylate + Mineral Oil + + + + + Motor Oils + + + + + N Nitric Acid % + - = - = Nitric Acid 4% - - - - - Nitric Acid 7% - - - - - O Oleic Acid % + + + Olive Oil + + + + + P Perchloroethylene + = = = Petroleum Ether + Phenol = - - - ( + ) excellent resistance ( = ) good-fair resistance ( - ) fair-poor resistance ( blank ) no data available PAGE B-2 Solution Conc. PAGE B-4 @ 23 C (73 F) B-2 PAGE B-88 @ 6 C (4 F) @ 8 C (75 F) PAGE B-9
CHEMICAL RESISTANCE CHART Chemical Agent Solution Conc. @ 23 C (73 F) @ 6 C (4 F) @ 8 C (75 F) P Phosphoric Acid 3% + + + Phosphoric Acid 3% + - + - + Phosphoric Acid 85% + - + - - Potassium Chloride % + = - Potassium Dichromate % + Potassium Hydroxide % - - - Potassium Hydroxide % - - - Potassium Hydroxide 6% - - - Potassium Permanganate % + + + S Silicone Fluids + + + Soap Solution % + + = = - Sodium Bicarbonate % + = - Sodium Bisulfate 5% + Sodium Bisulfite 5% + - Sodium Bisulfite % + - = - Sodium Carbonate % + - - Sodium Carbonate 2% + - - Sodium Chloride % + + = + - Sodium Hydroxide % - - - Sodium Hydroxide % - - - - Sodium Hydroxide 6% - - - Sodium Hypochlorite 5% + - Sodium Hypochlorite % + = - Sulfuric Acid 3% + - + - + Sulfuric Acid 3% + - + - - Sulfuric Acid 98% - - - - - T Tetrahydofuran = Toulene + = Transformer Oil + + + + + Trichlorethylene = Triethylamine = = Turpentine + V Vaseline + + + Vegetable Oils + + + + + W Water + + = = - White Spirits + X Xylene + ( + ) excellent resistance ( = ) good-fair resistance ( - ) fair-poor resistance ( blank ) no data available PAGE B-2 PAGE B-4 B-3 PAGE B-88 PAGE B-9