British Pound
Click flag to change Currency
My Account You are not logged in
Login
 

Categories

Site Search

Information


Back to Index

Needle Roller Bearings

Needle roller bearings are roller bearings with cylindrical rollers that are small in diameter. In spite of their low cross section, needle roller bearings have a high load carrying capacity and are therefore extremely suitable for bearing arrangements where radial space is limited.

SKF supplies needle roller bearings in different designs and a wide range of sizes, which are appropriate for different applications. In addition to customized designs, they comprise the following types and components:

  • needle roller and cage assemblies
  • Needle roller and cage assembly

  • drawn cup needle roller bearings
  • with open ends

    Drawn cup needle roller bearing with open ends

    and with a closed end

    Drawn cup needle roller bearing with a closed end

    full complement with open ends

    Full complement drawn cup needle roller bearingwith open ends

  • needle roller bearings with machined rings
  • with flanges
    • closure rings
    • Needle roller bearing with inserted closure rings (for bearings with Fw = 10 mm)

    • or integral flanges on the outer ring
    • Needle roller bearing with integral outer ring flanges (for bearings with Fw = 12 mm)

    • sealed
    • Needle roller bearing, sealed

    • or not sealed
    • and with inner ring
    • Needle roller bearing with an inner ring

    • or without an inner ring
    • Needle roller bearing without an inner ring

    without flanges on the outer ring, not sealed and with or without an inner ring

    Needle roller bearing without flanges on the outer ring

  • alignment needle roller bearings
  • with an inner ring

    Alignment needle roller bearing with an inner ring

    and without an inner ring

    Alignment needle roller bearing without an inner ring

  • inner rings for needle roller bearings
  • Needle roller bearing inner ring

  • universal joint bearings
  • Universal joint bearing

  • needle rollers
  • Combined needle roller bearings
  • needle roller / angular contact ball bearings

    Needle roller / angular contact ball bearing

    needle roller / thrust ball bearings

    Needle roller / thrust ball bearing

    needle roller / cylindrical roller thrust bearings

    Needle roller / cylindrical roller thrust bearing

  • needle roller thrust bearings and bearing washers
  • needle roller and cage thrust assemblies and appropriate washers

    Needle roller and cage thrust assembly

    needle roller thrust bearings with a centring spigot and appropriate washers

    Needle roller thrust bearing with a centring spigot

Needle rollers can be used to make full complement bearing arrangements for slow speed or oscillating applications. These compact bearing arrangements have a high load carrying capacity and are economical, provided the shaft and housing bore can serve as raceways. The cylindrical surface of the rollers is slightly relieved toward the roller ends to prevent damaging edge stresses.

For additional information about surface requirements for raceways, refer to the section Raceways on shafts and in housings. For assistance in designing full complement bearing arrangements or to calculate performance data for these bearing arrangements, contact the SKF application engineering service.

TolerancesSKF needle rollers are in accordance with ISO 3096:1996 Grade 2 for flat end needle rollers. SKF supplies needle rollers with the dimensional and form tolerances as listed in the table, where the preferred diameter deviations range from 0 to -7 Ám.

The rollers are gauged according to their minimum and maximum deviation from the nominal diameter.

Needle rollers for each gauge are packed separately and the package is marked with the gauge limits, e.g. N/M2 or M2/M4, where M signifies minus and N zero. For a needle roller with a 2 mm nominal diameter and gauge limits M2/M4, the actual diameter is between 1,998 mm and 1,996 mm.

NoteNeedle rollers of the same gauge should be used in each bearing arrangement.

A delivery of needle rollers of the same nominal diameter may contain packages of one or more gauges, depending on availability at the time.

MaterialsSKF needle rollers made from carbon chromium steel with a hardness of 58 to 65 HRC and have a precision machined surface.

Supplementary designationsThe designation suffixes used to identify certain features of SKF needle rollers are explained in the following:

DesignationBearing Features
BFNeedle roller with flat ends
G2Needle roller in accordance with ISO 3096:1996 Grade 2
M../M..Diameter tolerance of needle rollers, e.g. M2/M4 indicates diameter tolerance -2 to -4 Ám
N/M..Diameter tolerance of needle rollers, e.g. N/M2 indicates diameter tolerance 0 to -2 Ám


Needle roller bearings | Needle roller and cage assemblies | Drawn cup needle roller bearings | Needle roller bearings with machined rings | Alignment needle roller bearings | Needle roller bearing inner rings | Universal joint bearings |
Bearing terminology | Y-bearings | Deep groove ball bearings | Needle roller bearings | Combined cylindrical roller/taper roller bearings | Cylindrical roller bearings | Angular contact ball bearings | Combined needle roller bearings | Spherical roller bearings | Tapered roller bearings | Thrust ball bearings | CARB« toroidal roller bearings | Cylindrical roller thrust bearings | Angular contact thrust ball bearings | Tapered roller thrust bearings | Needle roller thrust bearings | Track runner bearings | Spherical roller thrust bearings | Indexing roller units | Backing bearings for cluster mills | Other SKF rolling bearings | Bearing accessories | Engineering products | Mechatronics

Back to Index

This page is still under construction. All bearing information remains the property and copyright of SKF Group.