RHP7210ATDULP5Angular Contact Ball Bearing – Straight Bore, 50 mm ID, 90 mm OD, 20 mm Width, 40 mm Total Width, Open, 30° Contact Angle, ABEC 5, Light Preload, Universal Duplex Pair

Product Description

What this part is

This is a matched duplex pair of RHP super precision single-row angular contact ball bearings, catalogue designation 7210ATDULP5, supplied as a universal unit. Each bearing measures Bore: 50 mm, Outside Diameter: 90 mm, Overall Width: 20 mm, giving a Total Width: 40 mm across the mounted pair. Contact Angle: 30°, with Rolling Elements: Ball, Number Of Rows: 1 per bearing, Bore Type: Straight and Closure Type: Open. Material: High Carbon Chrome Steel. Design Units: Metric.

Decoding the designation

72 / 7210 — the ISO 7210 size in dimension series 02, 50 x 90 x 20 mm.

A — 30° contact angle.

T — laminated phenolic cage.

DU — paired universal unit, mountable back-to-back, face-to-face or in tandem.

L — light preload.

P5 — ISO Class 5, ABEC 5.

What these specs mean in practice

A 30° contact angle is the steepest of the standard super precision angles, so the load path runs strongly axial and the pair delivers high axial stiffness once clamped, the usual choice for spindles and screw supports where thrust dominates. Preload: Light (L), which favours speed and thermal stability over maximum rigidity. Precision Class: ISO Class 5 / ABEC 5. Precision rating: ABEC 5. Cage Material: Phenolic. Cage Type: Laminated. Lubricant: Grease or oil. Item weight: 0.457 kg per bearing. The series 02 cross section is heavier than the equivalent series 10 bearing at the same bore, giving thicker rings and larger balls.

Mounting data

Chamfer dimensions are r min 1.1 mm and r1 min 0.6 mm. Shaft abutment diameter d1 min 57 mm; housing abutment D1 max 83 mm and D2 max 85 mm. Internal volume: 21.7 cm³. Lubrication jet pitch circle dT: 65.2 mm for oil-air or oil-jet feed.

Quantity and configuration

Unit Quantity: 2 Pcs, supplied as one matched universal set. Arrangement / Configuration: Universal duplex pair (DU), so the two bearings may be arranged back-to-back (DB), face-to-face (DF) or in tandem (DT), with the light preload established by the ground faces once clamped.

Interchange guidance

Equivalent designations for this size, angle, cage and class include 7210-A-T-DUL-P5, 7210-X4-TA-UF-EP5 and 3MM210WI CR DUL. NSK 7210A5TYNDULP5 covers the same matched pair in ABEC 5.