Aerospace / Military
Aerospace Series General Aviation Rod Ends Spherical Bearings Mil Spec Series Rod Ends Spherical Bearings Bushings Approved Part Numbers
Commercial / Industrial
Rod End Bearings Inch Rod Ends Metric Rod Ends Spherical Bearings Inch Spherical Bearings Metric Spherical Bearings
Technical Resources
Terms and Definitions Articles Technical Data FAQs Key Term Translation Custom Engineered Products
Online Catalog
Engineers power search our entire catalog of bearing and bushings, with access to every attribute and technical specification possible. View our online catalog...
Request Information
TNA bearings are similar to the TDO, but the inner race narrow faces are extended to abut and eliminate the need for a separate inner race spacer. Supplied with an in-built clearance to give a standard setting range, these bearings provide a solution for many fixed or floating bearing applications where simplicity of assembly is required.

Design Attributes:
  • Double cup and two single cones
  • Internal bearing clearance controlled by extending the front faces of the cones so they contact each other
  • SW variation features chamfers in the bores at the front faces of the two single cones to form a lubrication groove
  • SE variation features a backface rib design to accommodate radial lip seals or stamped closure
Unit of Measure

Key Dimensions

Cone Part Number

 N/A NA385

Cup Part Number

 N/A 384CD

Bore (d)

 N/A 2.1654 in55.001 mm

O.D. (D)

 N/A 3.937 in100 mm

Width (T)

 N/A 2.0625 in52.388 mm
Dynamic Radial Load Rating - 1M Revs (C1)1 N/A 42200 lbf188000 N
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 6280 lbf28000 N
Dynamic Radial Load Rating 2-Row - 90M Revs (C90-2row)3 N/A 10900 lbf48700 N
e Factor 4 N/A 0.35
K Factor 5 N/A 1.65

Other Dimensions

Weight

 N/A 3.45 lb1.56 Kg

Outer Ring Width (C)

 N/A 1.6875 in42.863 mm
Max Shaft Fillet Radius6 N/A 0.140 in3.5 mm
Max Housing Fillet Radius7 N/A 0.03 in0.8 mm

Shaft Backing Shoulder Dia. - Backface (db)

 N/A 2.64 in67 mm

Housing Backing Shoulder Dia. - Frontface (Da)

 N/A 3.68 in93.47 mm

Ka

 N/A 0.31 in7.94 mm

Kb

 N/A 0.19 in4.77 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)8 N/A 3810 lbf16900 N

Factors

Y1 Factor 9 N/A 1.91
Y2 Factor 10 N/A 2.84
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 3 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
  • 4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 5 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 6 These maximum fillet radii will be cleared by the bearing corners.
  • 7 These maximum fillet radii will be cleared by the bearing corners.
  • 8 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
  • 9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 10 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.