NSK7014CTRSUMP4YAngular Contact Ball Bearing, Super Precision — NSK 7014CTRSUMP4Y, 70x110x20 mm, 15° Contact Angle, Medium Preload, ABEC 7 / P4

Product Description

What this part is:

NSK 7014CTRSUMP4Y is a single-row super-precision angular contact ball bearing from the 70 series. Bore Diameter: 70 mm. Outside Diameter: 110 mm. Overall Width: 20 mm. Contact Angle: 15°. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Number Of Rows: Single Row. Bearing Material: Bearing Steel. Series: 70 Series. Base Number: 7014C.

Dynamic Load Rating: 59,000 N per bearing. Static Load Rating: 43,000 N per bearing. Limiting Speed: 12,800 rpm grease; 19,500 rpm oil. Item Weight: 0.606 kg (1.34 lb) per bearing. Load ratings and mass are quoted per bearing.

Decoding the designation:

7014 — 70 series super-precision angular contact ball bearing on a 70 mm bore.

C — 15° contact angle.

TR — phenolic resin cage, outer-ring guided.

SU — single bearing, universally ground, so like bearings pair in any arrangement.

M — medium preload class.

P4Y — NSK precision grade equating to ABEC 7 / P4.

What these specs mean in practice:

The 15° contact angle biases capacity toward radial load and lifts the speed ceiling relative to steeper 25° and 30° angles, which is why the C angle dominates machine-tool spindle work. Precision Class: ABEC 7 / P4. Preload: Medium (M). Cage Material: Phenolic. Cage Type: Outer-ring guided. Lubricant: Grease or oil / oil-air.

A phenolic cage guided on the outer-ring land runs quiet and tolerates the cage-pocket sliding speeds a spindle bearing sees, and its low mass limits unbalance forces at the top of the speed range. Medium preload raises axial and radial rigidity over the light class at the cost of extra heat generation, which is the usual trade in a stiffness-led spindle.

Mounting data:

Effective load centre a: 22.1 mm. Permissible axial load Pa: 26.8 kN. Minimum shaft abutment diameter da: 77 mm. Maximum housing abutment diameter Da: 103 mm. Maximum housing abutment diameter Db: 105 mm. Maximum shaft fillet radius ra: 1 mm. Maximum housing fillet radius rb: 0.6 mm. Minimum chamfer dimension r: 1.1 mm. Minimum chamfer dimension r1: 0.6 mm. Recommended grease quantity: 3.4 g per bearing.

Quantity and configuration:

Unit Quantity: 1 Pc. Mounting Arrangement: Single, universally ground (SU).

Interchange guidance:

Comparable 70x110x20 mm super-precision 15° angular contact bearings are catalogued by other makers as SKF 7014 CD/P4A, FAG B7014-C-T-P4S, Timken/Fafnir 2MM9114WI, RHP 7014CTDU, Koyo 7014C, NTN 7014CG/GNP4 and GMN S 6014 C. Preload class, cage and accuracy grade must be matched code for code before any of these is treated as a drop-in.