RHP7020ETSULP4Super Precision Angular Contact Spindle Bearing 100x150x24 mm 25° ABEC 7 Phenolic Cage Light Preload

Product Description

What this part is

An RHP 7020E-T-SUL-P4 super-precision angular contact ball bearing with a 100 mm bore, a 150 mm outside diameter and a 24 mm width. It has a phenolic cage and is single universally ground for light preload.

Decoding the designation

7020 — 70 angular contact series, 100 mm bore, 150 mm OD, 24 mm widthE — 25° contact angle in the RHP schemeT — phenolic cageSUL — single universally ground, light preloadP4 — precision class 4, equivalent to ABEC 7

What these specs mean in practice

A 25° contact angle carries substantially more thrust and gives higher axial rigidity than a 15° bearing of the same envelope, which is what a large boring or milling spindle needs when the cut pushes along the axis; the trade is a lower speed ceiling. Light preload keeps friction and heat generation down, so a large-bore spindle stays thermally stable over long cycles. Universal grinding means the ring faces are finished so any two bearings of this designation clamp into a light-preload set without shimming, back-to-back, face-to-face or in tandem. The phenolic cage is light and self-lubricating and quiet at speed, with a lower temperature ceiling than brass.

Published specifications

Bore: 100 mm (3.9370 in)Outside diameter: 150 mm (5.9055 in)Width: 24 mm (0.9449 in)Contact angle: 25°Preload: light (L)Precision class: P4, ABEC 7Cage material: phenolicNumber of rows: 1Rolling elements: steel ballsClosure: openGrinding: single universally ground

Condition of the rings

The bearing is new old stock with staining on the ring surfaces from storage.

Quantity and configuration

Supplied as 1 Pc, a single universally ground bearing.

Fitting notes

The bearing is mounted with the thrust face oriented to take the applied axial load and clamped against a ground shoulder or spacer. Where two are used together, the ground faces butt and the rings are clamped flush so the built-in offset develops the light preload. Cleanliness during assembly governs bearing life at ABEC 7.

Interchange guidance

Genuine equivalents are 25° ABEC 7 universally ground light-preload bearings in the same 100x150x24 mm envelope: FAG B7020-E-T-P4S-UL, NSK 7020A5TRSULP4, SKF 7020 ACD/P4A in light preload and Fafnir 3MM9120WI-SUL. The 15° build of this size, coded C by RHP and NSK, is a related size rather than an interchange, and medium or heavy preload versions change spindle stiffness and running temperature.