SNR71906HDUJ74Super Precision Angular Contact Ball Bearing 30x47x9 mm, 25 Degree Contact Angle, Stratified Phenolic Cage, Universal Duplex Pair Light Preload, ISO Class 4

Product Description

What this part is:

SNR 71906HDUJ74 (SNR Machline) super-precision angular contact ball bearings, thin-section 719 series, supplied as a universal duplex pair of 2 pieces. Bore Diameter: 30 mm. Outside Diameter: 47 mm. Width: 9 mm per bearing. Total Width: 18 mm for the pair. Contact Angle: 25°. Preload: Light, 14 lbf. Precision Class: ISO 4 / P4 / ABEC 7. Cage Material: stratified cotton-fabric-reinforced phenolic. Country of Origin: France.

Decoding the designation:

71906 — ISO 19 dimension series angular contact envelope, 30 x 47 x 9 mm.

H — 25° contact angle in the SNR scheme.

DU — pair of universal bearings, selected so bore and outside-diameter variation across the set stays within half the ISO tolerance.

J74 — 7 = light preload; 4 = precision class ISO 4 / P4 / ABEC 7.

Specifications:

Bore Diameter: 30 mm. Outside Diameter: 47 mm. Width: 9 mm per bearing. Total Width: 18 mm for the pair. Contact Angle: 25°. Dynamic Load Rating: 8,000 N (1,800 lbf) per single bearing. Static Load Rating: 5,920 N (1,330 lbf) per single bearing. Limiting Speed: 27,000 rpm grease; 42,000 rpm oil, per single bearing. Lubricant: grease or oil. Preload: Light, 14 lbf. Precision Class: ISO 4 / P4 / ABEC 7. Cage Material: stratified cotton-fabric-reinforced phenolic. Cage Type: machined, guided by the outer ring. Bearing Material: 52100 vacuum-degassed steel rings and balls. Rolling Elements: Steel balls. Number Of Rows: 1 per bearing. Closure Type: Open. Unit Quantity: 2 Pcs.

Dimensions and mounting:

Envelope per bearing: 30 x 47 x 9 mm. Pair stack: 18 mm. Straight bore. Universal grinding: the pair mounts back-to-back, face-to-face or tandem at the ground light preload with no shims.

Compatibility and replacement:

Cross-references in the 30 x 47 x 9 mm size at 25° and light preload: FAG B71906-E-T-P4S-DUL, SKF 71906 ACD/P4ADGA, 7906-E-T-DUL-P4 (world-number format), Timken Fafnir 3MM9306WI (Fafnir 25° series).

Frequently asked questions:

What size is the SNR 71906HDUJ74?

Bore 30 mm, outside diameter 47 mm, width 9 mm per bearing and 18 mm for the pair.

What do H and J74 mean?

H is the 25° contact angle. J74 is light preload with precision class ISO 4 / P4 / ABEC 7.

How many bearings are included?

Two bearings as one universal duplex pair.