NTN7015CT1GD2GLP4Super-Precision Angular Contact Spindle Bearing Pair, 75x115x20 mm, 15° Contact Angle, Phenolic Cage, Universally Ground Duplex Light Preload, ABEC 7 (P4)

Product Description

What this part is

This is a matched pair (2 pcs) of super-precision angular contact ball bearings in the 75 mm bore x 115 mm outside diameter x 20 mm width envelope – the ISO 7015 size.

Decoding the designation

The NTN suffix string decodes as: C is a 15 degree contact angle, T1 is the phenolic (resin) cage, GD2GL denotes a universally ground duplex set with light preload – the equivalent of the DUL designation other makers use – and P4 is ABEC 7 precision.

Quantity and configuration

Supplied as two pieces, the pair is preload-matched at the factory, so the bearings arrive at the specified light preload when mounted together back-to-back (DB), face-to-face (DF) or in tandem (DT) with no shimming or custom grinding.

What these specs mean in practice

Light preload favours speed and low heat generation over maximum rigidity, and the phenolic cage supports higher speeds than a steel cage because it is lighter and self-lubricating. A 15 degree contact angle likewise biases the bearing toward speed and radial capacity rather than pure thrust, which is why this combination is the default for grinding and high-speed milling spindles rather than heavily thrust-loaded axes.

Typical duty is machine-tool spindles, precision grinders, high-speed routers, rotary tables and test equipment where runout and preload consistency govern part accuracy.