NTN7014T1GD2GNP4Super Precision Angular Contact Ball Bearing Duplex Pair – 70 mm ID, 110 mm OD, 20 mm Width Each, 40 mm Pair, Open, 15° Contact Angle, Normal Preload, Phenolic Cage, ABEC 7

Product Description

What this part is

An NTN 7014T1GD2GNP4 super-precision angular contact ball bearing, supplied as a universally matchable duplex pair. Bore 70 mm, outside diameter 110 mm, 20 mm width per bearing and 40 mm across the mounted pair. Open on both faces, straight bore, one row of steel balls per bearing, machined phenolic cage riding on the outer ring land, high carbon chrome steel rings.

Decoding the designation

NTN’s 7014 gives the 70 series and a 70 mm bore, the ISO 7014 envelope. The contact angle is 15°. GN sets normal preload on NTN’s GL light, GN normal, GM medium, GH heavy ladder. DU denotes a duplex universal set. P4 is ABEC 7 precision. The carton also carries the Fafnir designation 2MM9114 WI CR DU, where 2MM confirms the 15° angle, 9114 maps to the ISO 7014 envelope, and CR confirms the phenolic outer-land-riding cage.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness; a 25° bearing of the same envelope carries more thrust and less speed. Normal preload holds both rings in contact through the operating range and keeps running accuracy stable, at more stiffness than a light setting and less heat than a heavy one. The machined phenolic cage is light and self-lubricating, which suits sustained high-speed running, and is rated to about 120 °C. Limiting speed is 9,200 rpm on grease and 12,000 rpm on oil.

Load ratings

Each bearing carries a basic dynamic radial rating of 47.0 kN (10,600 lbf) and a basic static radial rating of 43.0 kN (9,650 lbf). Mounted as the duplex pair the standard factors give 76.1 kN dynamic and 86.0 kN static. Load centre sits 22.0 mm from the face on each bearing.

Quantity and configuration

Two bearings, one duplex universal pair, 2 Pcs. The ring faces are ground so the pair mounts back-to-back, face-to-face or in tandem and produces the normal preload when clamped.

Fitting notes

Shaft shoulder diameter is 77.0 mm minimum; housing shoulder diameters are 103.0 mm and 105.5 mm maximum. Fillet radii are 1.1 mm and 0.6 mm, with maximum permissible chamfer radii of 1.0 mm and 0.6 mm. Published operating temperature range is −40 °C to 120 °C on oil or grease. Preloaded sets carry no internal clearance specification.

Interchange guidance

Direct equivalents at 15° are the SKF 7014 CD/P4A, NSK 7014CTRDULP4 and Fafnir 2MM9114WI CR families at matching preload. A 7014A or 7014B of the same envelope is a related size at 30° or 40°, and a single 7014 is a related size rather than a substitute for the pair. The Fafnir 2MM9114WI carries P4S tolerances rather than P4.