SNR7008CG1DUJ84Super-Precision Angular Contact Ball Bearing – 40 mm ID, 68 mm OD, 15 mm Width, Open, 15° Contact Angle, Phenolic Cage, ABEC 7, Medium Preload, Universally Matchable Pair

Product Description

What this part is:

NTN-SNR 7008CG1DUJ84 super-precision angular contact ball bearing, ISO 70 dimension series, supplied as a universally matchable set of two. Bore: 40 mm. Outside Diameter: 68 mm. Overall Width: 15 mm. Contact Angle: 15°. Number Of Rows: 1. Rolling Elements: Ball. Bearing Material: Bearing steel. Closure Type: Open. Bore Type: Straight. Series: ISO 70.

Decoding the designation:

7008 gives the ISO 70 dimension series and the 40 mm bore. C sets the Contact Angle: 15°. G1 gives the cage — Cage Material: Phenolic (laminated resin), Cage Type: Machined, outer-ring centred. J84 sets Preload: Medium and Precision Class: ISO Class 4 (ABEC 7 / P4). Searchable forms of the number: 7008CG1DUJ84, 7008C-G1-DU-J84, 7008 C G1 DU J84.

What these specs mean in practice:

A 15° contact angle runs faster and stiffer in the radial direction than a 25° angle, and carries less thrust, which suits high-speed machine-tool spindles. Cage Material: Phenolic (laminated resin) runs light and quiet at high speed and takes oil-mist and oil-air lubrication. Cage Type: Machined, outer-ring centred holds the cage stable on the outer-ring land at speed. Precision Class: ISO Class 4 (ABEC 7 / P4) holds running accuracy close, giving low radial and axial runout. Preload: Medium fixes the axial stiffness of the mounted set. Internal Clearance: N/A — a preloaded set is stiffness-set rather than clearance-set.

Quantity and configuration:

Unit Quantity: 2 Pcs, a factory-matched pair. Mounting Arrangement: Universal (DB, DF or DT). The pair stacks back-to-back, face-to-face or in tandem and reaches the same preload in any of the three.

Interchange guidance:

Carton cross-designations with the same 15° contact angle and a universally matchable medium-preload pair in the 40 x 68 x 15 mm size: FAG B7008-C-T-P4S-DUM, NSK 7008CTRDUMP4, Fafnir 2MM9108WI CR DUM. SKF 7008 CD/P4ADGB is also carton-listed but is a light-preload set (DGB); the SKF medium-preload set is 7008 CD/P4ADGC. A 7008A5, 7008ACD or 7008H execution has the same size at 25° and is a related size rather than a substitution.