RHP7214ATDULP4Angular Contact Ball Bearing Pair – 70 mm Bore, 125 mm OD, 24 mm Width, 30° Contact Angle, Phenolic Cage, Light Preload, ABEC 7

Product Description

What this part is

RHP 7214ATDULP4 super-precision angular contact ball bearing, supplied as a universally ground duplex pair. Bore Diameter: 70 mm. Outside Diameter: 125 mm. Overall Width: 24 mm per bearing. Contact Angle: 30°. Bore Type: Straight. Closure Type: Open. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Cage Material: Phenolic. Cage Type: Machined. Precision Class: ABEC 7 / P4. Preload: Light. Mounting Arrangement: Universally ground duplex (DU). Series: 72. Base Number: 7214. Bearing Material: Chrome steel. Unit Quantity: 2 Pcs.

Decoding the designation

7214 — ISO 72 dimension series, bore code 14, giving a 70 mm bore in a 125 mm outside diameter, 24 mm wide.

A — 30° contact angle in the RHP scheme.

T — machined phenolic cage.

DUL — universally ground duplex pair, light preload.

P4 — RHP EP7, equivalent to ABEC 7.

What these specs mean in practice

Contact Angle: 30°. Precision Class: ABEC 7 / P4. Preload: Light. Cage Material: Phenolic. Bore Diameter: 70 mm. Outside Diameter: 125 mm. Overall Width: 24 mm.

Thirty degrees sits between the 15° spindle angle and the 40° thrust angle, so this execution trades some speed for a substantially higher axial rating than a 15° bearing of the same size. A phenolic cage is light, self-lubricating and outer-ring guided, which is what keeps cage-generated heat down at speed. Universal grinding means any two bearings from the range stack into a DB, DF or DT arrangement and come up at the stated preload without shims. Light preload favours speed and low heat over maximum rigidity.

Mounting data

Straight bore, interference fit on the shaft. The pair is universally ground, so the faces are relieved to give the light preload when the rings are clamped solid. Bearing type and preload class must match across the set.

Quantity and configuration

Unit Quantity: 2 Pcs. Two bearings, universally ground and matched as a duplex set at light preload.

Interchange guidance

Direct 30° equivalents on the same 70 x 125 x 24 mm envelope: NSK 7214A, NTN 7214, Koyo 7214 and JTEKT 7214, all of which run 30° with no angle letter or with an A. MRC 7214 runs 29° on the same envelope and is a close related type. SKF 7214 ACD/P4A and FAG 7214-C-T-P4S are 25°, and SKF 7214 BE and FAG 7214-B are 40° — same envelope, different thrust-to-radial split, so related sizes rather than substitutions.