RHP7009CTRDULP3Super-Precision Angular Contact Ball Bearing Pair – Straight Bore, 45 mm ID, 75 mm OD, 16 mm Width Each, Open, 15° Contact Angle, Light Preload, Universal Duplex, P3

Product Description

What this part is

RHP 7009CTRDULP3 super-precision angular contact ball bearings supplied as a universally ground duplex pair. Bore 45 mm, outside diameter 75 mm, width 16 mm per bearing, 32 mm across the assembled set. Straight bore, open on both faces, single row of balls per bearing, machined phenolic cage riding on the outer ring land.

Decoding the designation

70 is the ISO light angular contact dimension series and 09 is the bore code, giving a 45 mm bore. C denotes a 15° contact angle in the RHP scheme. TR is an outer-ring-guided phenolic cage. DU marks universally ground duplex bearings and L sets light preload. P3 is ISO Class 4 dimensional accuracy combined with Class 2 running accuracy. The carton also carries 2M9109WICRDUL, whose CR code confirms the phenolic outer-land cage and whose DUL confirms the universal light preload.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity, which suits a high-rpm grinding or milling spindle. Guiding the cage on the outer ring land keeps it stable at speed, and the phenolic material is light and self-lubricating. Light preload removes internal play while keeping torque and heat low. The P3 grade tightens running accuracy a step beyond the dimensional class, so ring runout is held closer than a straight Class 4 bearing.

Quantity and configuration

Two pieces, a universally ground duplex pair. Universal grinding lets the two units stack as a back-to-back, face-to-face or tandem set with the light preload built into the ground ring faces, so the pair takes thrust in both directions when mounted back-to-back or face-to-face.

Fitting notes

Ring faces are ground flat and square for direct abutment, so preload develops when the shaft nut and housing cap are drawn fully home. Phenolic cages suit oil mist and circulating oil lubrication.

Interchange guidance

Same 15° equivalents are the NSK 7009CTRDULP3, the FAG B7009-C-T-P4S-UL and the SKF 7009 CD/P4ADGA. The Fafnir 2MM9109WICRDUL is the same specification under the WI numbering scheme.