Thomson™ Nyliner™ Straight Sleeve Bearings

Standard
Standard with Lubrication Groove
Standard with Carbon Steel Outer Sleeve
Standard with Lubrication Groove & Carbon Steel Outer Sleeve

Thomson Nyliner™ offers four types of straight sleeve bearings to provide high radial and static load capacity in limited spaces. This variety of straight sleeve bearings shares a standard feature of Thomson Nyliner plastic bearings, the axial compensation gap. This gap allows expansion and contraction in reaction to factors, such as humidity or temperature. The compensation gap will absorb most of the fluctuation in the plastic sleeve bearings.

Straight sleeve bearings are ideal for applications where press fitting into a housing bore is the most practical bearing retention method. Standard straight sleeve bearings are plain bearings with no lubricant groove or outer sleeve. Thomson Nyliner provides an option to add carbon steel or nickel-plated steel sleeve to the standard straight sleeve bearing. The additional outer sleeve allows the bearing to stand up to mildly corrosive environments. Unlike flanged sleeve bearings, some external form of bearing retention is required to retain straight sleeve bearings in the housing bore.

The minimum diametral shaft to bearing clearances normally recommended is .001˝ for bearing I.D. sizes to 1.000˝; .0015˝ for I.D. sizes from 1.000˝ to 1.250˝; and .002˝ for I.D. sizes over 1.250˝. These clearances are recommended to allow proper running clearance for trouble-free operation. Bearing material will expand slightly due to frictional heat and moisture absorption. The compensation gap will absorb the majority of this expansion. Changes in wall thickness are minimal due to the thin wall construction of Thomson Nyliner bearings. These recommended running clearances can be reduced in nylon bearings if Plus materials are used. Thomson Nyliner Engineering Polymers have much lower coefficients of linear thermal expansion than standard bearings. When bearings with nickel-plated sleeves are used, the shaft axis diameter should be reduced by .001˝. This compensates for the reduction in bearing I.D. by the addition of the nickel-plating to the steel sleeve.