Cylindrical Roller Bearings EW Series

Transcription

1 Cylindical Rolle Beaings NSK has developed a highe load-caying capacity pessed cage with low noise and supeio cage stength. Ou seies is a standad cylindical olle beaing that facilitates intechangeability acoss the globe, while offeing bette pefomance fo evey application.

2 Cylindical Rolle Beaing A newly developed standad beaing Rolle guide face NSK has been supplying a standad cage fo smalle-sized, single ow cylindical olle beaings as indicated hee: Standad beaings type (Pessed steel cage with flaps) High load-caying E type ET type (Polyamide esin cage) In the 21st centuy, you can now take advantage of NSK s newly developed cylindical olle beaing, the seies, which combines the stengths and technologies of pevious cages into a one-piece steel cage. NSK has achieved a new design involving even newe concepts, while maintaining excellence in function and sevice life. Ou seies can meet you high load-caying capacity needs fo the new ea. Design concept of ou newly developed standad beaing the seies Beaing Intechange Guide Intenal design compaison of the seies and seies Seies (Conventional type) Oute ing (Newly developed type) Rolles Cage Inne ing Seies High load ating Geate numbe of lage olles Highe limiting speed Maximum igidity and low noise Optimum and well-balanced design 1 2

3 High-Stength Cage Low Noise Results of FEM analysis Noise measuement test esults Conventional Seies 8 Measuing conditions : NU38 Method: JIS B1548 Radial load: 392 N Speed: 1 2 to 1 8 min 1 Noise level, db 7 Majo competito Micophone position and measuing load 45 1 Micophone diaphagm Speed, min 1 Measuing load: 392 N The seies is 3 to 7 db quiete than that of ou majo competitos. Tests confim that the stess levels of NSK s seies cages ae 4% lowe than that of cages in conventional seies. Highe Limiting Speed Highe Load Rating Cage stength test esults Compaison of limiting speed Compaison of dynamic load ating C Majo competito Numbe of oscillations until beakage No beakage and test discontinued Test conditions Test beaing: NU38 Oscillating angle: 3 Radial load: 7.4 kn Lubication method: oil bath 3 Oil level Limiting speed, min 1 Limiting speed, min Gease Lubication Oil Lubication Basic dynamic load ating, N NSK s seies showed geate cage stength pefomance than that of ou majo competitos. The limiting speed of the seies is 1-25% highe than that of conventional seies. The load ating of the seies is 1-6% highe than that of conventional seies. 3 4

4 Beaing Table NU NJ NUP B a a b D d F w F w F w D a d b d b d c D a d b d a d d seies and of NU, NJ, NUP. Bounday Dimensions Basic Load Ratings Limiting Speeds d D B (mm) 1 F w C [N] C o C [kgf] C o [min 1 ] Gease Oil min min Beaing Numbes Abutment and Fillet Dimensions Pemissible NU NJ NUP d a d b d c (mm) d d D a a b Axial Movement min min max min min max max max (mm) NU25 NJ NUP NU35 NJ NUP NU26 NJ NUP NU36 NJ NUP NU27 NJ NUP NU37 NJ NUP NU28 NJ NUP NU38 NJ NUP NU29 NJ NUP NU39 NJ NUP NU21 NJ NUP NU31 NJ NUP NU211 NJ NUP NU311 NJ NUP NU212 NJ NUP NU213 NJ NUP

5 CAT. No.E1238c 211 C-2 Pinted in Japan NSK Ltd. 21