15E INSOCOAT bearings

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3 15E INSOCOAT bearings Designs and variants INSOCOAT bearings with a coated outer ring INSOCOAT bearings with a coated inner ring Cages Sealing solutions Product tables 15E.1 INSOCOAT deep groove ball bearings E.2 INSOCOAT cylindrical roller bearings Bearing data (Dimension standards, tolerances, internal clearance, misalignment, friction, starting torque, power loss, defect frequencies, electrical properties) Loads (Minimum load, axial load carrying capacity, equivalent loads) Temperature limits Permissible speed Design of bearing arrangements Abutment dimensions Mounting Designation system E 1205

4 15E INSOCOAT bearings Electric motors, generators and associated equipment are at risk when an electric current passes through a bearing. This can damage the contact surfaces of rolling elements and raceways in the bearing (electrical erosion) and rapidly degrade the grease. An additional risk in electric motors and generators comes from high frequency currents due to the inherent stray capacitance. The risk of damage increases if the application uses a frequency converter. INSOCOAT bearings ( fig. 1) are designed to prevent current from passing through the bearing. The bearings are a very cost-effective solution compared with other insulation methods. By integrating the insulating properties into the bearing, INSOCOAT bearings can improve reliability and increase machine uptime by virtually eliminating the problem of electrical erosion. Designs and variants An INSOCOAT bearing is a standard bearing that has the external surfaces of its inner or outer ring plasma-sprayed with an aluminium oxide to form a coating. The coating is sealed More information Bearing life and load ratings Design considerations Bearing systems Recommended fits Abutment and fillet dimensions Lubrication with a resin to protect against the conductive effects of water and moisture. The basic coating can withstand voltages up to V DC. However, coatings to withstand voltages up to 2 000, or even V DC, can be supplied on request. The standard assortment of INSOCOAT bearings listed in this catalogue constitutes the most commonly used sizes and variants of: single row deep groove ball bearings single row cylindrical roller bearings Fig. 1 Matrix 1 provides an overview of the standard assortment. For bearing types and sizes other than those listed, contact the SKF application engineering service. For applications where smaller bearings than those listed are needed, SKF recommends using SKF hybrid bearings ( Hybrid bearings, page 1219). Mounting, dismounting and bearing care Mounting instructions for individual bearings... skf.com/mount 1206

5 Designs and variants INSOCOAT bearings with a coated outer ring INSOCOAT bearings typically have the external surfaces of the outer ring coated with aluminium oxide. These bearings are identified by the designation suffix VL0241. INSOCOAT bearings standard assortment Deep groove ball bearings Cylindrical roller bearings Matrix 1 INSOCOAT bearings with a coated inner ring INSOCOAT bearings that have the external surfaces of the inner ring coated are identified by the designation suffix VL2071. These bearings provide enhanced protection against high frequency electric currents due to the smaller coated surface area of the inner ring compared to the outer ring. Bore diameter [mm] 62../C3VL /C3VL /C3VL /C3VL2071 NU 10.. /C3VL0241 NU 10.. /C3VL2071 NU 2.. /C3VL0241 NU 2.. /C3VL2071 NU 3.. /C3VL0241 NU 3.. /C3VL2071 Bearing size E 1207

6 15E INSOCOAT bearings Cages INSOCOAT bearings are fitted with one of the following cages: for deep groove ball bearings a stamped steel cage, riveted, ball centred (no designation suffix) for cylindrical roller bearings a glass fibre reinforced PA66 cage, window-type, roller centred (designation suffix P) a machined brass cage, riveted, roller centred (designation suffix M) a machined brass cage, window-type, inner or outer ring centred, depending on the bearing design (designation suffix ML) Sealing solutions Some INSOCOAT deep groove ball bearings can be supplied capped. For selection advice, contact the SKF application engineering service. For additional information about cages, refer to Cages in the relevant product chapter ( page 298 for deep groove ball bearings and page 582 for cylindrical roller bearings). The lubricants generally used for rolling bearings do not have a detrimental effect on cage properties. However, some synthetic oils and greases with a synthetic oil base and lubricants containing a high proportion of EP additives, when used at high temperatures, can have a detrimental effect on polyamide cages. For additional information about the suitability of cages, refer to Cages ( page 37) and Cage materials ( page 152). 1208

7 Bearing data Bearing data Deep groove ball bearings Cylindrical roller bearings Dimension standards Tolerances Boundary dimensions: ISO 15 Normal Higher accuracy (up to P5) for some bearings on request Normal For additional information ( page 132) Values: ISO 492 ( tables 3 to 5, pages 137 to 139) The aluminium-oxide layer on the external surfaces of either the inner or the outer ring does not affect accuracy. Internal clearance C3 C3 Check availability of other clearance classes For additional information ( page 149) Values: ISO ( table 6, page 314) Values: ISO ( table 3, page 590) Values are valid for unmounted bearings under zero measuring load. Misalignment Identical to standard bearings ( page 312) Identical to standard bearings ( page 585) Friction, starting torque, power loss Frictional moment, starting torque and power loss can be calculated as specified under Friction ( page 97), or using the tools available online at skf.com/bearingcalculator. Defect frequencies Electrical properties Defect frequencies can be calculated using the tools available online at skf.com/bearingcalculator. The standard INSOCOAT layer provides protection against AC and DC currents. The minimum ohmic resistance is 50 MW at V DC. Tests at SKF have shown that electrical breakdown of the insulating layer occurs above V DC. 15E 1209

8 15E INSOCOAT bearings Loads Minimum load, axial load carrying capacity, equivalent dynamic bearing load, equivalent static bearing load For load recommendations, refer to Loads in the relevant product chapter ( page 316 for deep groove ball bearings and page 594 for cylindrical roller bearings). Temperature limits Refer to Temperature limits in the relevant product chapter ( page 318 for deep groove ball bearings and page 599 for cylindrical roller bearings). Permissible speed Refer to Permissible speed in the relevant product chapter ( page 318 for deep groove ball bearings and page 600 for cylindrical roller bearings). Design of bearing arrangements Abutment dimensions To maximize the effectiveness of the insulation, SKF recommends the following guidelines for dimensioning the shaft and housing shoulders ( fig. 2). For bearings with a coated outer ring (designation suffix VL0241), the abutment diameter in the housing should be D a min ( product tables). For bearings with a coated inner ring (designation suffix VL2071), the abutment diameter on the shaft should be d a max ( product tables). Mounting During mounting, INSOCOAT bearings should be handled in the same way as standard bearings. When using an induction heater, the INSOCOAT layer must not be damaged by the vibration of the heater. For bearings with a coated inner ring (designation suffix VL2071), use a protective sleeve or an additional support block made of plastic. In cases where springs are used to apply preload or lock nuts are used for axial clamping, SKF recommends inserting a steel spacer ring between the bearing and the preload or locking device ( fig. 3). 1210

9 Designation system Fig. 2 Designation system Refer to Designation system in the relevant product chapter ( page 320 for deep groove ball bearings and page 602 for cylindrical roller bearings). The designation suffixes used to identify INSOCOAT bearings are explained in the following. D a min VL0241 External surfaces of the outer ring are coated VL2071 External surfaces of the inner ring are coated Coated outer ring d a max Coated inner ring Fig. 3 1 mm d a max d a min d a max d a min Steel spacer ring 15E 1211

10 15E.1 INSOCOAT deep groove ball bearings d mm B r 2 r 1 r 1 r 2 D D 1 d d 1 D 2 Principal dimensions Basic load ratings Fatigue Speed ratings Mass Designation dynamic static load limit Reference Limiting speed speed d D B C C 0 P u mm kn kn r/min kg , ,5 6314/C3VL ,9 49 2, ,2 6215/C3VL , , /C3VL ,8 55 2, ,4 6216/C3VL ,5 3, , /C3VL ,1 64 2, , /C3VL ,5 3, ,1 6317/C3VL ,5 2, ,4 6218/C3VL , ,9 6318/C3VL , ,5 6219/C3VL , , /C3VL , , /C3VL , /C3VL , /C3VL , , /C3VL , ,2 6224/C3VL , ,5 6324/C3VL , , /C3VL , /C3VL , ,5 6328/C3VL , ,8 6230/C3VL , /C3VL

11 r a r a D a d a Dimensions Abutment and fillet dimensions Calculation factors d d 1 D 1 D 2 r 1,2 d a d a D a D a r a k r f g ~ ~ ~ min. min. max. min. max. max. mm mm 70 94, , , , ,5 0, , , , , , , ,5 0, , ,5 0, , , ,5 0, , , ,5 0, , , ,5 0, , , ,5 0, ,5 0, , , ,5 0, , E

12 15E.2 INSOCOAT cylindrical roller bearings d mm B r 2 r 1 r 3 r4 D D 1 d F Principal dimensions Basic load ratings Fatigue Speed ratings Mass Designation dynamic static load limit Reference Limiting speed d D B C C 0 P u speed mm kn kn r/min kg ,3 57 7, ,27 NU 1010 ECP/C3VL , ,48 NU 210 ECM/C3VL , ,36 NU 310 ECM/C3VL ,2 69, ,45 NU 1011 ECML/C3VL , , ,78 NU 211 ECM/C3VL ,73 NU 311 ECM/C3VL ,5 5, ,48 NU 1012 ML/C3VL , ,97 NU 212 ECM/C3VL , ,16 NU 312 ECM/C3VL ,7 81,5 10, ,45 NU 1013 ECP/C3VL ,23 NU 213 ECM/C3VL , ,63 NU 313 ECM/C3VL , , ,62 NU 1014 ECP/C3VL , ,37 NU 214 ECM/C3VL ,12 NU 314 ECM/C3VL ,3 71 9, ,75 NU 1015 M/C3VL , ,48 NU 215 ECM/C3VL ,9 NU 315 ECP/VL ,9 NU 315 ECM/C3VL , , NU 1016/C3VL ,84 NU 216 ECM/C3VL ,61 NU 316 ECM/C3VL ,1 91,5 11, ,1 NU 1017 M/C3VL , ,25 NU 217 ECM/C3VL , ,32 NU 317 ECM/C3VL , , ,35 NU 1018 M/C3VL ,75 NU 218 ECM/C3VL ,26 NU 318 ECM/C3VL , ,4 NU 1019 ML/C3VL , ,84 NU 219 ECM/C3VL , ,25 NU 319 ECM/C3VL

13 r a r b D a d a d b Dimensions Abutment and fillet dimensions Calculation factors d D 1 F r 1,2 r 3,4 s 1) d a d a d b D a D a r a r b k r ~ min. min. min. max. min. min. max. max. max. mm mm ,5 1 0,6 1 53, ,4 1 0,6 0, ,5 1,1 1,1 1, ,15 92, , , , ,5 1,1 1 0,5 59, ,1 86,3 66 1,5 1, ,5 1 0, , , ,6 69,5 1,1 1 2,9 64, ,1 95,7 72 1,5 1,5 1, , ,5 1,5 0, ,1 2, , , ,5 74 1, , , , ,5 1,5 1,5 1, ,5 1,5 0, ,5 2,1 2,1 2, , , ,5 79,5 1,1 1 1,3 74, , ,5 1,5 1,5 1, ,5 1,5 0, ,1 2,1 1, , , , , , , ,5 1,5 1,5 1, , ,5 1,5 0, ,1 2,1 1, , ,1 2,1 1, , ,5 1,1 1 3, , , , , , ,1 2,1 2, , , ,5 1,1 1 3,3 89, , , , , , ,5 2,5 0, ,5 1,1 3, , ,5 1 0, , , , , , ,5 2,5 0, ,5 1,1 3, , ,5 1 0, ,5 2,1 2,1 1, , , , , ,5 2,5 0,15 1) Permissible axial displacement from the normal position of one bearing ring relative to the other. 15E

14 15E.2 INSOCOAT cylindrical roller bearings d mm B r 2 r 1 r 3 r4 D D 1 d F Principal dimensions Basic load ratings Fatigue Speed ratings Mass Designation dynamic static load limit Reference Limiting speed d D B C C 0 P u speed mm kn kn r/min kg , ,45 NU 1020 M/C3VL ,02 NU 220 ECM/C3VL ,65 NU 320 ECM/C3VL , ,3 NU 1022 M/C3VL ,62 NU 222 ECM/C3VL ,99 NU 322 ECM/C3VL , ,55 NU 1024 M/C3VL ,63 NU 224 ECM/C3VL , ,94 NU 324 ECM/C3VL ,85 NU 1026 ML/C3VL ,62 NU 226 ECM/C3VL , ,3 NU 326 ECM/C3VL ,05 NU 1028 M/C3VL , NU 228 ECM/C3VL ,12 NU 328 ECM/C3VL , ,9 NU 1030 ML/C3VL , ,8 NU 230 ECM/C3VL ,06 NU 330 ECM/C3VL

15 r a r b D a d a d b Dimensions Abutment and fillet dimensions Calculation factors d D 1 F r 1,2 r 3,4 s 1) d a d a d b D a D a r a r b k r ~ min. min. min. max. min. min. max. max. max. mm mm ,5 1,1 3, , ,5 1 0, ,1 2,1 1, , , , , ,5 2,5 0, ,1 3, , , ,5 2,1 2,1 2, , , ,5 2,5 0, ,1 3, , ,5 2,1 2,1 1, , , ,5 2,5 0, ,1 4, , , , ,5 2,5 0, , , ,1 4, , , ,5 2,5 0, , , ,5 2,1 1,5 4, ,5 0, , ,5 2,5 0, ,15 1) Permissible axial displacement from the normal position of one bearing ring relative to the other. 15E