FAGL15RA500YPThin Section Angular Contact Ball Bearing 5.000 x 5.625 x 5/16 in, Type A Single-Direction Thrust, Open, Brass Separator

Product Description

What this part is

FAG L15RA500YP, a thin section angular contact ball bearing. Bore: 5.000 in (127.00 mm). Outside Diameter: 5.625 in (142.88 mm). Width: 5/16 in (0.3125 in, 7.94 mm). Cross Section: 5/16 x 5/16 in square. Contact Angle: 30°. Precision Class: ABEC 1. Cage Material: brass. Cage Type: one-piece machined circular pocket separator. Rolling Elements: 5/32 in balls, single row. Closure Type: open. It is the Type A angular contact execution of the inch thin section envelope known through the Kaydon Reali-Slim and Silverthin systems, and the direct equivalent of Kaydon KB050AR0 and Silverthin SB050AR0.

Decoding the designation

L — thin section bearing family.

15 — cross-section code for the 5/16 x 5/16 in square section, matching the Kaydon KB and Silverthin B sections.

R — open, with a retainer.

A — Type A angular contact, single row, thrust-capable in one direction.

500 — bore in hundredths of an inch, giving 5.000 in.

YP — one-piece machined pocket-type brass separator, the construction the trailing R0 denotes in Kaydon KB050AR0 and Silverthin SB050AR0.

Published performance data

Dynamic Radial Load Rating: 976 lbf by the Kaydon method, 2,081 lbf calculated per ISO 281.

Dynamic Thrust Load Rating: 2,410 lbf.

Static Radial Load Rating: 2,500 lbf.

Static Thrust Load Rating: 7,210 lbf.

All four capacities are per bearing and are not simultaneous. Combined radial and thrust loading is checked against a combined-load calculation.

Mass: 0.370 lb (0.168 kg).

Mounting data

Land Diameter L1: 5.231 in. Land Diameter L2: 5.393 in. Counterbore Diameter L3: 5.460 in.

Maximum Shaft Or Housing Fillet Radius Cleared: 0.040 in.

Race Width Tolerance: +0.000 / −0.005 in.

Bearing corners are normally chamfered. Thin rings take the form of whatever they are clamped into, so housing bores and shaft seats are machined round and flat to a tighter standard than a conventional bearing seat, the surrounding structure is rigid, and clamping load is applied uniformly around the circumference.

What these specs mean in practice

A thin section bearing trades load capacity for envelope and mass: a very thin radial wall and a very large open bore, at a much lower rating than a conventional bearing of the same outside diameter. The design driver is usually something that has to pass down the centre, which is why these concentrate in robotics joints, gimbals, rotary and index tables, medical imaging gantries, semiconductor wafer handlers, and optical and radar positioners.

Ball diameter stays at 5/32 in across the whole KB section range, and ball count rises with the pitch circle, so capacity climbs modestly with diameter rather than scaling the way it does in a conventional series.

Static radial capacity above dynamic radial capacity is normal in large thin-section geometry. The static figure is a non-brinell limit under rigid shaft and housing support; the dynamic figure is an L10 rating at one million revolutions.

Type A angular contact carries thrust in one direction and requires applied thrust to establish its contact angle. Reversing thrust is served by a duplex pair, BR0 back-to-back or FR0 face-to-face, or by a four-point contact XP0.

Quantity and configuration

Unit Quantity: 1 Pc. Single bearing, open both faces.

Interchange guidance

Direct equivalents: Kaydon KB050AR0, Silverthin SB050AR0, INA CSEB050, SKF FPAB500, NSK NBA12707, NTN KYB050, SSB RB050AR0, RBC KB050AR0. FAG and INA are both Schaeffler Group brands, so INA CSEB050 is the in-house sibling.

Related sizes with different contact geometry, sealing or thrust capability: SB050CP0 radial contact, SB050XP0 four-point contact, JSB050CP0 and JSB050XP0 sealed, SB050BR0 duplex back-to-back, SB050FR0 duplex face-to-face.