SNR7003CDUJ74Super Precision Angular Contact Ball Bearing 17x35x10 mm, 15 Degree Contact Angle, Stratified Phenolic Cage, Universal Duplex Pair Light Preload, ISO Class 4, 41,000 rpm

Product Description

What this part is

SNR Machline super-precision angular contact ball bearing. 17 mm bore, 35 mm outside diameter, 10 mm width. Contact Angle: 15 degrees. Cage Material: Stratified, cotton-fabric-reinforced phenolic, machined and outer-ring-land guided. Supplied as a universal duplex pair at light preload, ISO class 4. Mounted as a pair the set occupies 20 mm of shaft length. A small, very high-speed spindle bearing: published limiting speed is 41,000 rpm on grease and 65,000 rpm on oil.

Decoding the designation

7003 is the ISO 70-dimension series angular contact envelope, 17 x 35 x 10 mm. C is SNR’s code for 15 degrees; H is 25 degrees. DU is duplex universal, flush ground, mountable back-to-back, face-to-face or in tandem. J74 combines preload and precision: the middle digit gives preload class, 7 for light, and the final digit gives precision, 4 for ISO class 4, so J74 is light preload, ISO class 4.

What these specs mean in practice

15 degrees is the shallow, high-speed spindle angle; light preload is the lowest-friction and lowest-heat preload class; the phenolic cage tolerates the resulting conditions. Together they give a 41,000 rpm grease rating on a 17 mm bore, suited to high-frequency spindles, small grinding spindles and precision instrument drives. Dynamic Load Rating: 7.40 kN (1,664 lbf), single bearing. Static Load Rating: 4.45 kN (1,000 lbf), single bearing. Operating Temperature Range: -40 to 120°C.

Quantity and configuration

DU designates a matched pair ground as a set. Bearings from a common original set reproduce the specified light preload when clamped together.

Interchange guidance

The carton cross-reference 7003-C-T-DUL-P4 is a genuine equivalent: C denotes 15 degrees in both schemes, T is the machined phenolic cage, DUL matches SNR’s J74, and P4 is ISO class 4. Also equivalent: B7003-C-T-P4S-DUL in Schaeffler format, 7003CD in SKF format, and the 2MM9103WI family in Fafnir/Timken format. A 7003A5 at 25 degrees or 7003A at 30 degrees shares this envelope and is not a substitute.