NSK7006A5TYDUMP4Super Precision Angular Contact Ball Bearing Duplex Pair – 30 mm ID, 55 mm OD, 13 mm Width Each, Open, 25° Contact Angle, Polyamide Cage, Medium Preload.

Product Description

What this part is

NSK 7006A5TYDUMP4 super-precision angular contact ball bearing, supplied as a factory-matched duplex pair. Each bearing is 30 mm bore by 55 mm outside diameter by 13 mm width. Open on both faces, chrome steel rings and balls in a ball-guided glass-fibre reinforced polyamide cage.

Decoding the designation

7006 is the ISO 70 dimension series in the 06 bore code, 30 mm. A5 is NSK’s 25° contact angle. TY is the ball-guided moulded polyamide cage execution. DUM is a duplex pair at medium preload, and P4 is ISO tolerance class 4, equivalent to ABEC 7.

What these specs mean in practice

A 25° contact angle carries more thrust and less speed than the 15° C-suffix version of the same envelope, so it suits spindle positions where axial stiffness matters more than top speed. Basic dynamic load rating is 14.5 kN (3 260 lbf) and basic static load rating 10.3 kN (2 315 lbf). Limiting speed is 22 000 r/min on oil, over an operating range of −20 to 100 °C. The polyamide cage is quiet and light, and sets that temperature ceiling.

Quantity and configuration

Two pieces, a universally matched duplex pair supplied together as one set. Medium preload is established by the ground ring faces when the two are clamped together.

Fitting notes

A preloaded duplex pair carries no internal clearance value; preload and radial clearance are mutually exclusive settings. The pair clamps solid against the shaft and housing shoulders without shims.

Interchange guidance

Same-specification equivalents at 25° and medium preload are the SKF 7006 ACD/P4ADGB, the FAG B7006-E-T-P4S-UM and the Timken Fafnir 3MM9106WI-DUM. The NSK 7006CTYDUMP4 shares the envelope at a 15° contact angle and is a related size rather than an interchange.