SKF Bearing Select v1.2-45 COJINETES ARBOL 3 Grupo 3 COJINETES ARBOL 3 ULEAM August 19, 2020 1. Abstract Self-aligning ball bearing Self-aligning ball bearing Locating Non-Locating SKF Explorer Designation Life model Grease Basic SKF life Relubrication interval L10h L10mh tf Static safety Frictional factor moment Popular item Power loss Total S0 h M Ploss Nmm W Left 1315 K 83400 > 2x10^5 12600 2.79 256 2.1 Right 1215 K 188000 > 2x10^5 17500 3.87 108 0.91 * SKF rating life ( L10mh ) for steel-steel bearings; GBLM load based life ( L10GMh ) for hybrid bearings Left bearing ! For rating life results above 100000 hours, other failure modes than those included in the current rating life models will dominate and limit the life of the bearing. Right bearing ! For rating life results above 100000 hours, other failure modes than those included in the current rating life models will dominate and limit the life of the bearing. SKF Bearing Select 2 This report was produced with SKF Bearing Select software. Please note the limited warranty, shown at the bottom of the last page of this report ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19 2. Input 2.1. Bearing data Designation Bearing type Principal dimensions d D B mm Basic load ratings Fatigue load limit Dynamic Static C C0 Pu kN Left 1315 K Self-aligning ball bearing 75 160 37 79.3 30 1.43 Right 1215 K Self-aligning ball bearing 75 130 25 39 15.6 0.8 Designation Speed ratings Reference Limiting nref nlim r/min Left 1315 K 8000 5600 Right 1215 K 10000 6700 SKF Bearing Select 3 This report was produced with SKF Bearing Select software. Please note the limited warranty, shown at the bottom of the last page of this report ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19 2.2. Loads & Speed Locating bearing None (axial load ignored) Bearing distance 279.4 Shaft orientation Horizontal Rotating ring Inner ring rotation Coordinate system Load LC1 mm Coordinates Forces Speed x|r y|θ Z Fx|Fr Fy|Fθ Fz mm mm|deg mm kN kN kN r/min 80.0 F1 Cartesian 0.0 0.0 0.0 10.11 3.68 0.0 F2 Cartesian 0.0 0.0 279.4 3.791 1.38 0.0 Case weight 1 2.3. Temperature Load Cases Left Inner ring Right Outer ring Inner ring Outer ring 65 70 65 °C LC1 70 - Maximum temperature is used for calculating the actual viscosity, kappa, aSKF and SKF rating life. - Mean temperature is used for calculating bearing friction and power loss. SKF Bearing Select 4 This report was produced with SKF Bearing Select software. Please note the limited warranty, shown at the bottom of the last page of this report ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19 2.4. Lubrication Designation Lubricant Effective EP additives Type method Name Left 1315 K Grease SKF grease LGEV 2: extreme high viscosity with solid lubricants False Right 1215 K Grease SKF grease LGEV 2: extreme high viscosity with solid lubricants False Designation Contamination Method Contamination factor ηc Left 1315 K User defined 1.0 Right 1215 K User defined 1.0 2.5. Fits and tolerances Designation Requirements Tolerance Class Guidance Housing Shaft Calculated interference Include Smoothing Left 1315 K False H7 N/A True True Right 1215 K False H7 N/A True True SKF Bearing Select 5 This report was produced with SKF Bearing Select software. Please note the limited warranty, shown at the bottom of the last page of this report ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19 3. Results 3.1. Loads & static safety Designation Load ratio Static safety factor Equivalent dynamic load Equivalent static load C/P S0 P P0 kN Left 1315 K 7.37 2.79 10.76 10.8 Right 1215 K 9.67 3.87 4.03 4.03 3.2. Bearing minimum load Designation Reaction forces Minimum load Radial Axial met? Fr Fa Fr m kN Left 1315 K 10.8 0 0.39 yes Right 1215 K 4.03 0 0.26 yes SKF Bearing Select 6 This report was produced with SKF Bearing Select software. Please note the limited warranty, shown at the bottom of the last page of this report ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19 3.3. Adjusted reference speed Designation Adjusted reference speed Adjustment factors nar For bearing load P For oil viscosity fp fv r/min Left 1315 K 4740 0.74 0.8 Right 1215 K 6140 0.84 0.73 3.4. Lubrication conditions Designation Viscosity ratio Operating viscosity Actual Rated Rated @ 40 °C ν ν1 νref K mm²/s Left 1315 K 190 95.6 465 1.98 Right 1215 K 190 103 511 1.84 SKF Bearing Select 7 This report was produced with SKF Bearing Select software. Please note the limited warranty, shown at the bottom of the last page of this report ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19 3.5. Grease life and relubrication interval Relubrication interval Designation Grease quantit y Speed factor Ring Speed x mean diameter tf ndm h g mm/min Left 1315 K 12600 12 9510 Right 1215 K 17500 6 8230 3.6. Bearing rating life Designation Bearing rating life SKF life modification factor Contaminati on factor Basic SKF L10h L10mh askf ηc h Left 1315 K 83400 > 2x10^5 6.91 1.0 Right 1215 K 188000 > 2x10^5 13.82 1.0 * SKF rating life ( L10mh ) for steel-steel bearings; GBLM load based life ( L10GMh ) for hybrid bearings Left bearing ! For rating life results above 100000 hours, other failure modes than those included in the current rating life models will dominate and limit the life of the bearing. Right bearing ! For rating life results above 100000 hours, other failure modes than those included in the current rating life models will dominate and limit the life of the bearing. SKF Bearing Select 8 This report was produced with SKF Bearing Select software. Please note the limited warranty, shown at the bottom of the last page of this report ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19 3.7. Bearing friction & power loss Designation Frictional moment Power loss Friction Sources Total At start 20-30°C and zero speed Rolling Sliding Seals Drag loss M Mstart Mrr Msl Mseal Mdrag Nmm Ploss W Left 1315 K 256 115 213 42.7 0 0 2.1 Right 1215 K 108 24.0 99.7 9.21 0 0 0.91 3.8. Bearing frequencies Designation Rotational frequencies Inner ring Outer ring Rolling element set & cage Rolling element about its axis fi fe fc fr Hz Left 1315 K 1.33 0 0.56 4.05 Right 1215 K 1.33 0 0.58 5.31 Designation Frequency of over-rolling Point on inner ring Point on outer ring Rolling element fip fep frp Hz Left 1315 K 12.3 8.97 8.11 Right 1215 K 14.9 11.6 10.6 SKF Bearing Select 9 This report was produced with SKF Bearing Select software. Please note the limited warranty, shown at the bottom of the last page of this report ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19 3.9. Fits and tolerances 3.9.1. Tolerances Designation Shaft outer diameter Bearing bore Bearing outer diameter Minimum Maximum Minimum Maximum Minimum Maximum µm Left 1315 K N/A N/A N/A N/A -25 0 Right 1215 K N/A N/A N/A N/A -18 0 Designation Housing bore Minimum Smoothing Maximum Shaft and bearing bore Bearing outer ring and housing µm Left 1315 K 0 40 N/A 21 Right 1215 K 0 40 N/A 21 - For the tolerances calculation, the normal tolerance for the bearing bore and outer diameter is used. 3.9.2. Fits, Probable Interference (+) / Clearance (-) Designation Shaft Probable minimum Housing Middle Probable maximum Probable minimum Middle Probable maximum µm Left 1315 K N/A N/A N/A -77 -53 -30 Right 1215 K N/A N/A N/A -72 -50 -28 SKF Bearing Select 10 LIMITED WARRANTY : The SKF Bearing Select software tool of the SKF Company supports the calculation and selection of bearings. This software is provided 'as is' with out any warranty of any sort, implicitly as well as explicitly. Please note that the obtained results can be affected by many external parameters and/or the quality of the assumptions taken into account. The results obtained using this software must be validated by the user who accepts the fact that the use of this software and the exploitation of the obtained results are under the user's entire and sole responsibility. ® SKF is a registered trademark of the SKF Group. © SKF Group 2019. 2020-08-19
