SNR7010CVDUJ74Super Precision Angular Contact Ball Bearing Matched Duplex Pair 50 x 80 x 16 mm 15 Degree ABEC 7 Light Preload

Product Description

What this part is

A matched duplex pair of super-precision angular contact ball bearings, each 50 mm bore × 80 mm outside diameter × 16 mm width, in the ISO 7010 envelope.

Decoding the designation

7010 — single-row angular contact ball bearing, 100 dimension series, bore code 10, giving a 50 mm bore.
C — 15° contact angle in the SNR scheme.
DU — duplex, a factory-matched set of two.
J74 — light preload. This is SNR’s super-precision preload family, distinct from the J20 to J50 radial clearance codes used on standard bearings.
P4 — ISO precision class 4, equivalent to ABEC 7.

What these specs mean in practice

A 15° contact angle biases the bearing toward speed and radial rigidity, and carries less thrust than a 25° bearing in the same envelope. Light preload keeps ball-to-race contact loads and heat generation low, which suits high-speed spindles where thermal growth rather than stiffness sets the limit; the J84 medium-preload version in the same envelope trades that speed headroom for axial stiffness. The 100 series is the light envelope, so at 50 mm bore the 80 mm outside diameter keeps rotating mass and pitch diameter down.

Published specifications

Bore: 50 mm (1.9685 in)
Outside diameter: 80 mm (3.1496 in)
Width per bearing: 16 mm (0.6299 in)
Stack width, pair: 32 mm (1.2598 in)
Contact angle: 15°
Precision class: ISO P4 / ABEC 7
Preload: light (J74)
Rows per bearing: 1
Rolling elements: steel balls
Closure: open, both faces
ISO base number: 7010 C

Quantity and configuration

Matched duplex pair, 2 Pcs. The two bearings are ground as a set, and the pair carries the light preload as supplied.

Fitting notes

Mounting is an interference fit on the shaft and a close fit in the housing bore, both held to super-precision spindle limits. The pair goes onto the shaft in the orientation marked on the rings, with the scribe lines aligned; faces seat against square ground shoulders, and a runout error at the shoulder transfers directly into the raceway.

Interchange guidance

Same-spec 15° P4 light-preload duplex equivalents in other schemes are the SKF 7010 CD/P4ADGA, FAG B7010-C-T-P4S-DUL, NSK 7010CTYDUL and Timken Fafnir 2MM9110WI-DUL. The 7010-AC or 7010-A5 at 25°, and the J84 medium-preload version, are related sizes rather than interchanges.