NSKSuper Precision Angular Contact Ball Bearing 30x62x16mm 30 Degree Contact Angle ABEC 7 Machined Phenolic Cage Single Universally Ground Light Preload Open

Product Description

What this part is

One NSK 7206A5TRSULP4Y super-precision angular contact ball bearing, 30 mm bore × 62 mm outside diameter × 16 mm width. Single row, 30° contact angle, machined phenolic cage, open, ABEC 7 precision, universally ground and set for light preload.

Decoding the designation

7206 – ISO base number, 30x62x16 mm boundary dimensions.

A5 – 30° nominal contact angle in NSK’s angular contact scheme (NSK C would be 15°).

TR – machined phenolic (textile-laminate) cage. NSK’s TY/TYN suffixes denote a polyamide cage instead.

SUL – Single, Universally ground, Light preload.

P4 – ABEC 7 precision class (P4S would be ABEC 7/9, P5 would be ABEC 5).

Y – an NSK special-specification suffix.

Why 30° changes the job the bearing can do:
At 30°, this is the high-thrust end of the angular contact range. The steeper contact angle routes far more of the ball load into the axial direction, giving substantially higher thrust capacity and axial stiffness than a 15° bearing in the same 30x62x16 mm envelope. What you give up is speed and radial stiffness: the steeper load path increases centrifugal and gyroscopic loading on the balls and cage, which raises heat generation and lowers the practical speed ceiling. This makes 30° the right choice for ballscrew support, drilling and boring positions and heavily thrust-loaded spindle ends, and the wrong choice for a very high-speed grinding spindle designed around a 15° bearing.

Why universally ground matters

The U in SUL is the useful part. Universally ground rings are relieved to a controlled, symmetrical amount, so two bearings of this designation develop the specified light preload in any orientation without a calculated spacer or shim stack. A non-universal single cannot be paired this way.

Why a phenolic cage and not polyamide

The TR machined phenolic cage is light, dimensionally stable under centrifugal load and mildly oil-absorbent, which gives it real tolerance of marginal lubrication — the reason it remains the traditional choice for oil-mist and oil-air lubricated spindles. Practical temperature ceiling is in the region of 120 °C. Polyamide (TY/TYN) cages are cheaper and quieter but less tolerant of high temperature and certain lubricant chemistries.

Published ratings

Dynamic load rating 20.3 kN. Static load rating 15.3 kN. Limiting speed 24000 rpm. Temperature range -30 °C to 120 °C. Mass 0.44 lbs.

Quantity and configuration

Quantity supplied is one (1) bearing, consistent with the SUL single designation.

Interchange guidance

Same-envelope 30x62x16 mm candidates include SKF 7206 ACD and 7206 ACDGA, FAG B7206–E–T–P4S, NTN 7206A/7206ADB and NSK 7206A5TYNSULP4 (polyamide cage variant). The 15° NSK 7206CTRSULP4 shares the envelope but not the duty. Confirm contact angle, precision class, cage material, preload class and universal-grind status before substituting.