RHP7017CTSULP4Super-Precision Spindle Angular Contact Ball Bearing – Straight Bore, 85 mm ID, 130 mm OD, 22 mm Width, Open, 15° Contact Angle, Light Preload, Single Universal, ABEC 7

Product Description

What this part is

RHP 7017CTSULP4 super-precision spindle angular contact ball bearing. Bore 85 mm, outside diameter 130 mm, width 22 mm. Straight bore, open on both faces, single row of balls, machined phenolic cage piloted on the outer ring land.

Decoding the designation

70 is the ISO light angular contact dimension series and 17 is the bore code, giving an 85 mm bore. C denotes a 15° contact angle in the RHP scheme. T is a fabric-base laminate phenolic cage. SU marks a single universally ground bearing and L sets light preload. P4 is ISO Class 4, equivalent to ABEC 7. The carton also carries 2MM9117WICRSUL and B7017X2TASUEP7, whose 2MM and X2 codes confirm the 15° angle, whose CR code confirms the outer-land phenolic cage, and whose EP7 confirms the ABEC 7 class.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity, which is the usual choice for a high-rpm grinding or milling spindle. The light 70 series keeps the section thin, so the bearing fits a slender housing and runs cool. Piloting the phenolic cage on the outer ring land holds it stable at speed. Light preload removes internal play while keeping torque and heat generation low.

Quantity and configuration

One piece. Universal grinding means any two units of this designation stack directly as a back-to-back, face-to-face or tandem set, with the light preload built into the ground ring faces. A single-row angular contact bearing takes thrust in one direction, so a second bearing opposes it.

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. Oil lubrication suits this class at speed.

Interchange guidance

Same 15° equivalents are the FAG B7017-C-T-P4S-UL, the SKF 7017 CDGA/P4A and the NSK 7017CTRSULP4. The Fafnir 2MM9117WICRSUL is the same bearing under the WI numbering scheme.