RHP7019CTDUMP4Super Precision Angular Contact Ball Bearing – Straight Bore, 95 mm ID, 145 mm OD, 24 mm Width, Open, 15 Degree Contact Angle, ABEC 7, Medium Preload, Phenolic Cage

Product Description

What this part is

RHP 7019CTDUMP4 super-precision angular contact ball bearing, 95 mm bore, 145 mm outside diameter, 24 mm width. The inner and outer raceways are offset so the ball contact line runs at an angle across the bearing, which is what lets an angular contact bearing carry thrust in one direction alongside its radial load.

Decoding the designation

7019-C-T-DUM-P4 is the RHP form: 7019 is the ISO 70 series with a bore code of 19 giving the 95 mm bore, C gives a 15° contact angle, T a fabric-base laminate phenolic cage, DUM a universally ground duplex execution at medium preload and P4 the ABEC 7 precision grade. The trailing -1/2PR marks the supply unit as one half of a pair. 2MM9119WI-CR-DUM is the Fafnir equivalent, where 2MM confirms 15°, CR marks a phenolic outer-land-riding cage and the 9119 series number corresponds to the ISO 7019 designation.

Quantity and configuration

One bearing, 24 mm wide, straight bore, open on both faces, no snap ring groove. The -1/2PR suffix is the piece count: it denotes a single bearing supplied as one half of a matchable pair. Universal grinding means the faces are ground so bearings from the series can be mounted together back-to-back, face-to-face or in tandem, with the medium preload established on clamp-up.

What these specs mean in practice

A 15° contact angle is the high-speed end of the angular contact range. The shallow contact line keeps ball spin and heat generation low, which is what buys the speed, and the trade is thrust capacity: a 25° or 40° bearing in the same envelope carries substantially more axial load. Medium preload gives more stiffness and running accuracy than a light setting, at the cost of extra heat, and it is the usual choice where the spindle must hold position under cutting load. Basic dynamic capacity is 76.5 kN and basic static capacity 75 kN, with a limiting speed of 9,000 rpm.

Preload and clearance

This bearing is preload-set rather than clearance-set. Internal geometry is fixed by the axial force applied through the ground faces, so radial internal clearance is not a parameter for it and no clearance class applies.

Interchange guidance

The 95 × 145 × 24 mm envelope is the ISO 7019 size. Same-angle, same-preload equivalents include SKF 7019 CDGB/P4 and Fafnir 2MM9119WI CR DUM. On SKF designations the DGA, DGB and DGC suffixes denote preload magnitude rather than a mounting direction. NSK 7019CTYNSUMP4 matches the angle, grade and preload but is a single universal rather than a duplex execution. The 7019E and 3MM9119WI executions occupy the same envelope at 25°, so they are related sizes rather than interchanges.