RHP7012ETDUMP4Angular Contact Ball Bearing – Straight Bore, 60 mm ID, 95 mm OD, 18 mm Width, 36 mm Total Width, Open, 25° Contact Angle, ABEC 7, Medium 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 7012ETDUMP4, supplied as a universal unit. Each bearing measures Bore: 60 mm, Outside Diameter: 95 mm, Overall Width: 18 mm, giving a Total Width: 36 mm across the mounted pair. Contact Angle: 25°, with Rolling Elements: Ball, Number Of Rows: 1 per bearing, Bore Type: Straight and Closure Type: Open. Material: High Carbon Chrome Steel throughout the rings and balls.

Decoding the designation

70 / 7012 — the ISO 7012 size in dimension series 10, 60 x 95 x 18 mm.

E — 25° contact angle.

T — laminated phenolic cage.

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

M — medium preload, 780 N for the pair.

P4 — RHP EP7, ISO Class 4, ABEC 7.

What these specs mean in practice

The 25° contact angle sits in the middle of the super precision range, carrying substantial thrust while retaining radial stiffness, which suits machine tool spindles and precision rotary tables. Dynamic Load Rating: 33,000 N (33.0 kN) and Static Load Rating: 29,100 N (29.1 kN) apply to a single bearing. Limiting Speed: 20,000 rpm on oil or oil-air lubrication and 12,400 rpm on grease, both figures for a single bearing. Preload: Medium (M), 780 N for the pair. Precision Class: ISO Class 4 / ABEC 7 (RHP EP7). Lubricant: Grease or oil. Design Units: Metric.

The laminated phenolic cage is light and self-lubricating, which is what allows the speeds above. Cage Material: Phenolic. Cage Type: Laminated. Item weight: 0.407 kg per bearing.

Mounting data

Chamfer dimensions are r min 1.1 mm and r1 min 0.6 mm. Shaft abutment diameter d1 min 67 mm; housing abutment D1 max 88 mm and D2 max 90 mm. Effective load centre a: 27.1 mm from the bearing face. Internal volume: 18.0 cm³. Lubrication jet pitch circle dT: 72.5 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) to suit the application, with the medium preload established by the ground faces once clamped.

Interchange guidance

Equivalent designations for this size, angle, cage and class include 7012-E-T-DUM-P4, B7012X3TADUMEP7 and 3MM9112WI CR DUM. NSK 7012A5TYNDUMP4 covers the same 25° matched pair in ABEC 7.