Radial Extended Inner Race Bearings

Radial Extended Inner Race Bearing (RAX)

  • ID: .375 to 1.25 in.
  • OD: 1.125 to 2.5 in.
  • Radial bearing
  • Inner race is extended with set screws for locking to the shaft

Lutco unground radial ball bearings are designed for applications where speeds and loads are moderate and where noise level requirements and running accuracy do not justify using more expensive precision ground bearings. Since the raceways are unground but highly polished, radial bearings are designed for applications with speeds not exceeding 1200 rpm.

Radial bearings consist of a full complement of precision steel balls, a machined inner race and a pair of cold formed outer races captured by a soft steel band providing a fully unitized assembly. The soft steel band on the OD allows for the bearing to be pressed into a housing made without close housing tolerances. The axial load rating is 50% of the radial load rating.

 

Lutco Bearing Features

  • Full complement of balls for maximum bearing capacity
  • Case carburized raceways for high wear resistance
  • Cylindrical or spherical OD for mounting in straight or spherical bored housings
  • Grease packed
  • Various platings available for protection against corrosion
  • Can be ordered open, shielded or sealed
  • Limiting Speed 1200 RPM

 

Radial Bearing Construction

Radial Bearing Design

Construction

Lutco radial bearings consist of a full complement of precision steel balls, a machined inner race and a pair of cold formed outer races captured by a soft steel jacket. this design allows for retained seals, and extra deep raceways. the jacket on the OD allows for the bearing to be pressed into a housing made without close tolerances.

Full Complement of Balls

A full complement of balls offers more contact between the balls and races. this results in more resistance to brinelling from shock loads. carbon balls are standard. Alternate ball materials are available upon request. the grades of balls used range from 200 to 1000 depending on the specific application.

Internal Clearance (Radial & Axial)

Standard radial play is .002"/.008". Axial play is .005"/.020", depending on the size of the bearing.

Lubrication

Standard grease has a temperature range of –30°F to +325°F. Other greases are available upon specification.

Heat Treating

Lutco's heat treating processes include carburizing and carbonitriding. Inner and outer race surface hardness specification is Rc 59–63.

Eccentric Locking Collar

Lutco bearings are available with the same style eccentric locking collars as precision bearings.

Special Locking Devices

Keyways and cross drilled holes for pinning are among many available options depending upon application requirements.

Set Screws

The standard construction provides two 1⁄4"–28 cup point socket set screws spaced 120° apart. For severe applications, special lock patch, serrated point, or other set screw designs are available. Recommended set screw torque is 60 in-lbs.

Seal and Shield Options

LUTCO is the leader in sealed, full complement, unground bearings, servicing the needs of a wide range of industries. LUTCO provides various sealing and shielding options to meet challenging environmental demands. Seal/Shield designations are listed in the suffix of LUTCO bearing designs. See below for common options or call the factory for special applications.

PP Double Seal

This is our standard seal. The design is a single piece HY-CARR rubber seal.

 

 

P Single Seal

This is our standard seal. The design is a single piece HY-CARR rubber seal on flange side.

 

 

 

PP2 Super Seal

Recommended where severe conditions require superior sealing. Seal construction includes a two piece BUNA N rubber with a NYLON GS backing.

 

 

 

P2 Super Seal

Recommended where severe conditions require superior sealing on flange side. Seal construction includes a two piece BUNA N rubber with a NYLON GS backing.

 

 

 

NPP Nylon Double Shield

Recommended for light seal drag applications, grease retention, and minimal environmental protection.

 

 

 

NP Nylon Single Shield

Recommended for light seal drag applications, grease retention, and minimal environmental protection. Nylon shield on flange side only.

 

 

 

MPP Double Shielded

Steel shields on both sides.

 

 

 

 

MP Single Shielded

Steel shield on flange side only.

 

 

Radial Load Ratings

Load ratings printed in the design guide are based on ninety percent of the group surviving for 500 hours. Environment, shock loading, sealing, temperature, lubrication, heat, configuration of ball tracks and speeds under load, all directly influence bearing life. Printed ratings are to be used only as a guide in the design for a given application. Field testing is advised in order to assure the suitability of a bearing for a particular application. We do not recommend accelerated testing, as it may not be representative of actual field conditions.

radial and flanged bearing load ratings

metric and centerflange radial load bearing ratings

All Lutco ball bearings will sustain a thrust load of 50% of the rated radial load. (the combined radial and thrust load should not exceed the indicated radial load.) It is suggested that if there is a question regarding the Lutco bearing capacity for a specific application, please call (508) 756-6296.

Product Design Guide

The Lutco Design Guide has detailed information including product specifications, technical drawings & measurements, load rating and testing data, interchange tables, conversion tables, unique applications, and more.

product design guide