NSK7006CTYDULPA7Super Precision Angular Contact Ball Bearing – 30 mm ID, 55 mm OD, 13 mm Width, 15° Contact Angle, Light Preload Universal Duplex Pair

Product Description

What this part is

An NSK 7006CTYDULPA7 super-precision single-row angular contact ball bearing, supplied as a universally matchable duplex pair. Bore 30 mm, outside diameter 55 mm, width 13 mm per bearing. Open on both faces, 15° contact angle, with a ball-guided moulded polyamide cage.

Decoding the designation

7006 places the bearing in the ISO 70 dimension series at a 30 mm bore. C is NSK’s code for a 15° contact angle, distinct from A at 30° and A5 at 25°. TY denotes the ball-guided polyamide cage. DUL marks a universally matchable duplex set at light preload, ground so the two rings mount without a spacer.

What these specs mean in practice

The 15° contact angle is the standard machine-tool spindle choice: it carries less thrust than a 25° or 30° bearing but runs faster and locates more stiffly in the radial direction. A ball-guided polyamide cage runs with lower friction, lower noise and less temperature rise than a phenolic cage below roughly 1.4 million DmN, which suits grease-packed spindles. Limiting speed is 27,100 rpm on grease and 41,200 rpm on oil-air.

Load ratings

Basic dynamic radial load rating 15.9 kN and basic static radial load rating 10.3 kN, each figure applying to a single bearing.

Quantity and configuration

Two bearings, universally ground as a matched light-preload set. Because preload is set at the factory, radial internal clearance does not apply.

Interchange guidance

The ISO base number is 7006C. Same-angle super-precision equivalents include the Timken Fafnir 2MM9106WI-CR-DUL, SKF 7006 CD/P4ADGA, FAG B7006C.T.P4S.UL and NTN 7006CGD2/GNP4. A 7006A or 7006A5 in the same envelope carries a different contact angle and is a related size rather than a substitution.