The designations of most SKF rolling bearings follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes (→ Basic bearing designation system) NCF 2340 ECJB/PEX where NCF 2340 = EC = R Inner or outer ring with roller and cage assembly of a separable bearing
SKF highcapacity cylindrical roller bearings with an inner ring centred cage († fig 13) are identified by the series designation NCF ECJB († product tables) NCF 2340 ECJB 420 138 2 550 3 200 300 1 600 2 200 915 NCF 2340 ECJB/PEX 420 138 2 200 3 200 300 1 400 2 200 925 NUH 2340 ECMH
Several bearing inspections since 2006 show the superior performance in these applications Diagram 1 Comparison of cage slip at different radial loads 100 90 80 70 60 50 40 30 20 10 0 0 5 10 15 20 25 30 35 40 45 Cage slip [%] Radial load [kN] n Highcapacity bearing NCF 2334 ECJB/C3 n Conventional
d 70 mm D 100 mm B 19 mm d1 ≈ 805 mm D1 ≈ 885 mm E 925 mm s max 1 mm r12 min 1 mm r34 min 06 mm Parameter r34 has either the value specified here or the same value as r12 Abutment dimensions da min 75 mm das 785 mm Da max 95 mm Db max 96 mm ra max 1 mm
رولبرینگ NCF 2240 ECJB NUH 2240 ECMH رولبرینگ NCF 2340 ECJB NCF 2340 ECJB/PEX NUH 2340 ECMH رولبرینگ NUH 2340 ECMH/PEX 12 220 میلی متر رولبرینگ NCF رولبرینگ استوانه ای SKF پر غلتک تک ردیفه (Single row full complement cylindrical roller bearings) رولبرینگ استوانه ای پر غلتک
d 260 mm D 360 mm B 60 mm d1 ≈ 291 mm D1 ≈ 323 mm E 3337 mm s max 35 mm r12 min 21 mm r34 min 15 mm Abutment dimensions da min 271 mm das 287 mm Da max 348 mm Db max 350 mm ra max 2 mm rb max 15 mm Calculation data Basic dynamic load rating C 737 kN
