NSK7006A5TYDBC7P5Angular Contact Ball Bearing Matched Pair – 30 mm ID, 55 mm OD, 13 mm Width Each, Open, 25° Contact Angle, Back-To-Back Duplex, ABEC 5

Product Description

What this part is

NSK 7006A5TYDBC7P5 angular contact ball bearings supplied as a factory-matched duplex pair. Bore 30 mm, outside diameter 55 mm, width 13 mm per bearing, 26 mm across the assembled set. Straight bore, open on both faces, one row of balls per bearing.

Decoding the designation

70 is the ISO light angular contact dimension series and 06 is the bore code, giving a 30 mm bore. A5 denotes a 25° contact angle in the NSK scheme. DB denotes a duplex back-to-back matched set. P5 is ISO Class 5, equivalent to ABEC 5.

What these specs mean in practice

A 25° contact angle carries more thrust and less speed than a 15° bearing of the same envelope, which is why the 25° grade is chosen for spindles that see meaningful axial cutting load. Back-to-back mounting spreads the load lines outward, giving a wide effective bearing span and high resistance to moment loading. ABEC 5 sets the ring runout and raceway accuracy needed for a ground finish.

Quantity and configuration

Two pieces, one matched duplex pair. The pair is ground as a set for back-to-back mounting, with the offset built into the ring faces, so the two bearings work together against a shaft shoulder and housing land.

Fitting notes

Faces marked with the manufacturer stamp go together in the back-to-back orientation. Preload is developed by clamping the ground ring faces solid, so the shaft nut and housing cap are drawn fully home against the abutting faces.

Interchange guidance

Same 25° angle equivalents are the SKF 7006 ACD/P5 and the FAG B7006-E series. The Fafnir 2MM9106WI designation also appearing on this carton is the 15° grade of the same envelope, so it is a related size rather than a direct substitution.