KaydonOpen Thin-Section Radial Contact Ball Bearing 70 x 86 x 8 mm, Square 8 x 8 mm Section, ABEC 1F, 1 Pc

Product Description

What this part is

A Kaydon Reali-Slim thin-section ball bearing, 70 mm bore by 86 mm outside diameter by 8 mm wide, open. The cross-section is square, 8 mm of radial wall and 8 mm of width, which is the defining feature of the thin-section family. It is a radial contact bearing, the Conrad-assembly deep groove type, so it carries radial load plus thrust in either direction and a modest moment load.

Decoding the designation

K — AISI 52100 bearing steel races and balls, open.

070 — 70 mm bore.

08 — 8 mm square cross-section.

C — bearing type, radial contact (Conrad deep groove).

T — separator, formed-ring snap-over type.

0 — Kaydon Precision Class 1, per ABEC 1F, with the standard internal fit for the size.

-10111 — a Kaydon build reference carried on the carton, held here as a search term.

In Kaydon’s scheme the type letter C is radial contact, A is angular contact and X is four-point. A radial contact bearing takes thrust equally in both directions and runs singly.

What these specs mean in practice

A thin section buys space, weight and a large through-bore. An 8 mm wall carrying a 70 mm shaft lets a hollow shaft, a wiring loom, an optical path or a slip ring pass straight through the middle of a rotating joint, in a housing far smaller than a standard-series bearing needs. It also cuts rotating mass and inertia.

The trade is load capacity and stiffness: there is less material and a smaller ball complement than a standard 6014, so these bearings are chosen for accurate, low-friction guidance under moderate load, in robot and gimbal joints, rotary tables and indexers, medical imaging, semiconductor handling, optical mounts and camera platforms.

On a large thin-section deep groove bearing the static radial capacity sits above the dynamic radial capacity. That is normal for the family: the static figure is a non-brinell limit set by contact stress on a rigidly supported ring, while the dynamic figure is a fatigue rating at one million revolutions of L10 life.

Being open, the bearing is lubricated on assembly and protected by the housing. The sealed build (Kaydon material code J, two nitrile seals) is a different part number and arrives pre-greased.

Published specifications

Bore: 70 mm.

Outside diameter: 86 mm.

Width: 8 mm.

Cross-section: 8 x 8 mm, square.

Dynamic Load Rating: 4,089 N radial, per bearing — Kaydon’s published capacity at 1 million revolutions of L10 life.

Dynamic Load Rating, ISO 281:1990 basis: 7,041 N radial, per bearing — published by Kaydon for comparison with ISO-rated bearings.

Static Load Rating: 7,433 N radial, per bearing — a non-brinell limit with rigid shaft and housing support.

Mass: 0.10 kg (0.22 lb).

Bearing type: radial contact (Conrad deep groove), single row.

Closure: open.

Separator: formed ring, snap-over.

Rolling elements: 5/32 in balls.

Precision: Kaydon Class 1, ABEC 1F.

Internal fit: standard for the size.

Race and ball material: AISI 52100 bearing steel.

Quantity and configuration

Unit Quantity: 1 Pc, one open bearing.

Mounting data

Land diameter L1: 75.9 mm.

Land diameter L2: 80.1 mm.

Maximum shaft or housing fillet radius the bearing corners clear (F): 0.8 mm.

Bearing corners are chamfered.

Thin-section rings take the form of what they are mounted in: an 8 mm wall follows the shape of the housing bore, so shaft and housing flatness and roundness follow the values Kaydon specifies for thin-section work. The rings seat across their full face, clamped by a full-face flange. The bearing is supplied dry.

Interchange guidance

The direct equivalents are other thin-section radial-contact bearings in the same 70 mm bore, 8 mm square section: the Kaydon K07008C series, and RBC Thin Section and Silverthin metric equivalents of matching type and closure. Same-envelope traps: a K07008XP0 is four-point contact, a K07008A is angular contact, and a J07008CT0 is the sealed build. All three share the outside dimensions and none is a drop-in substitute for a radial-contact open bearing.