NTN7002CDBGMP5Angular Contact Ball Bearing DB Matched Duplex Pair – 15 mm Bore, 32 mm OD, 9 mm Width Each, 18 mm Paired Width, 15° Contact Angle, Open, P5 / ABEC 5, 2 Pcs

Product Description

What this part is

NTN 7002CDB/GMP5 is a matched pair of single-row angular contact ball bearings, supplied as a back-to-back duplex set. Each bearing is 15 mm bore by 32 mm outside diameter by 9 mm width; assembled as a pair the set measures 18 mm across. Both rings are open, and the set is ground to ABEC 5 running accuracy.

Decoding the order code

The 70 gives the extra-light angular contact dimension series and 02 is the bore code, 02 × 5 = 15 mm. C denotes a 15° nominal contact angle in the NTN scheme. DB marks the pair as ground for back-to-back mounting — DF would be face-to-face and DT tandem. P5 is the precision class, equivalent to ABEC 5.

What these specs mean in practice

A 15° contact angle carries less thrust than a 25° or 40° bearing of the same envelope and in exchange runs faster and cooler, because the ball path stays closer to the plane of rotation and ball-spin heating falls. That is why the 15° grade dominates machine tool and high-speed spindle work, where radial stiffness and speed matter more than thrust capacity.

Back-to-back geometry

In a DB pair the two outer-ring counterbores face outward, so the load lines diverge as they pass through the shaft axis. That wide effective load span gives a DB set the highest moment stiffness of the three duplex arrangements and lets it resist tilting from an overhung tool or pulley. A DB pair takes thrust in both directions. Because the faces are matched at the factory, the pair sets its own axial preload when both inner rings are clamped solid against one another.

Cage and lubrication

Fabric-base laminate phenolic cage, outer-ring land riding. Phenolic runs quieter and at higher speed than a pressed steel cage and absorbs oil, which suits oil-mist and oil-air feed. Operating temperature range up to 120 °C. Per-bearing basic load ratings are 5.6 kN dynamic and 2.8 kN static, and limiting speed is 38,000 rpm.

Quantity and configuration

Two bearings, supplied as one matched DB duplex set. Open faces, 15 mm cylindrical bore, 15° contact angle, P5 class, phenolic cage. Mass 0.15 lb per bearing.

Interchange guidance

SKF 7002 CDGB/P5 and NSK 7002CTYNDBMP5 are the corresponding DB-matched 15° P5 sets in their own schemes, where SKF C and NSK C both denote 15°. NTN 7002CDF/GMP5 is the same pair ground face-to-face and NTN 7002CDT/GMP5 the tandem version — different arrangements, so related sets rather than substitutes. A single NTN 7002C is one half of the envelope and does not form a preloaded pair on its own.