RHPSuper Precision Angular Contact Ball Bearing – Matched Pair, Straight Bore, 65 mm ID, 120 mm OD, 23 mm Width, Open, 15° Contact Angle, Universal Light Preload, ABEC 7

Product Description

What this part is

RHP 7213CTRDULP4 is a super precision single-row angular contact ball bearing supplied as a universally matched pair. Bore: 65 mm. Outside Diameter: 120 mm. Overall Width: 23 mm per bearing. Total Width: 46 mm for the pair. Series: 7200, ISO dimension series 02. Contact Angle: 15°. Precision Class: ISO Class 4, equal to RHP P4, BS292 EP7 and ABEC 7. Bore Type: Straight. Closure Type: Open. Searchable forms of the designation include 7213CTRDULP4, 7213-C-TR-DUL-P4, 7213 C TR DUL P4 and 7213CTRDULP4Y.

Decoding the designation

Type: single-row angular contact ball bearing. Dimension Series: 02. Bore Code: 13, giving a 65 mm bore. Contact Angle: 15°. Cage Material: Laminated phenolic. Cage Type: Outer-ring guided, machined. Arrangement / Configuration: DU, a universally matched pair. Preload: L, light. Precision Grade: P4. The carton also carries the Fafnir designation 2MM213WI CR DUL, where 2MM is likewise 15°.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity. Light preload sets 440 N of axial preload across the pair and gives 95 N/µm of axial stiffness, which holds shaft position under cutting load while keeping heat generation low. P4 accuracy holds inner-ring radial runout to 4 µm and outer-ring radial runout to 5 µm, lowering runout and vibration at the tool. The laminated phenolic cage runs to 120 °C and is quiet at speed. Rings and balls are SAE 52100 chrome bearing steel, through hardened and heat treated for dimensional stability. Lubricant: oil or grease.

Load ratings and speed

Dynamic Load Rating: 92.0 kN per bearing. Static Load Rating: 58.5 kN per bearing. Permissible Axial Load: 40.0 kN. Limiting Speed: 12,500 rpm on grease and 19,000 rpm on oil or oil-air. Effective Load Centre: 23.9 mm. Item Weight: 1.01 kg per bearing. Internal volume: 41.1 cm³. Lubrication jet pitch circle diameter: 86.2 mm.

Mounting dimensions

Abutment diameters: shaft shoulder d1 74 mm minimum, housing shoulder D1 111 mm maximum, seal counterbore D2 114 mm maximum. Chamfer Dimensions: r 1.5 mm minimum, r1 1.0 mm minimum.

Quantity and configuration

Unit Quantity: 2 Pcs, one universally matched pair. Universal face control means the pair mounts back-to-back, face-to-face or in tandem at the same preload, with no ground spacers required. Internal Clearance: N/A — the set is preloaded. The high point of radial runout is marked by a burnished spot on the inner ring face and a V line on the outer diameter; the V also shows the direction of the contact angle.

Interchange guidance

Closest matches at the same size, 15° angle, phenolic cage and light preload: Fafnir 2MM213WI CR DUL, NSK 7213CTRDULP4 and FAG B7213-C-T-P4S-DUL. SKF 7213 CD/P4DGA is the same 15° bearing at extra light preload. RHP 7213A5 is the 25° bearing in the same size and is a related part, not a substitution.