The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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Needle Bearing (NB) Type
  • Designed with high quality, pre-lubricated, and sealed needle bearings
  • Ideal for applications up to 25° of angular misalignment and speeds up to 6,000 RPM
  • Available in sizes: 6, 8, 10 and 12 (Other sizes are quantity dependent) with your choice of round, hex, splined, or keyway bores
  • Boot retaining grooves are standard. (Boots are available for purchase separately.) 
  • Lubrication is required for optimal wear – boots and lubricant extend universal joint life
Unit of Measure

Specifications

Description 

 N/A NB8B-UJ-1/2X3/4

Type

 N/A Universal Joints - NB Type

Material

 N/A Steel

Style

 N/A Bored

Weight

 N/A 1.74 lb

Color

 N/A Metallic

Bore Type

 N/A Finished Bore

Dimensional Data

Bore A & B

 N/A 1/2 & 3/4 in

Size

 N/A NB8B

Set Screw Size

 N/A 1/4-20

Keyway A & B (W x D)

 N/A 1/8 x 1/16 & 3/16 x 3/32 in

Outside Diameter

 N/A 1.250 in

Overall Length

 N/A 3.75 in

Bore Depth (Dimension C)

 N/A 1.060 in

Max. Bore (Dimensions ID1/ID2)

 N/A 0.750 in18.00 mm

Main Pin Height (Dimension E)

 N/A 1.880 in

Cubic inches

 N/A 5.85938 in³

Performance Data

Operating Temperature Range

 N/A -30 to 212 ºF

Static Breaking Torque

 N/A 2500.00 in·lb

Max. Speed

 N/A 6000 rpm

Static Breaking Torque

 N/A 2500.00 in-lb

Max. Angle Offset

 N/A 25.00 º

Notes

Notes 

 N/A
  • Static Breaking Torque is not recommended operating torque.
  • Square and hex bore measured across the flats.
  • Maximum operating angle for transmission of power is 25°.
  • For greater angular operation, use double universal joint. Join two universal joints back to back and connect with a short shaft. Attach universal joints to shaft by drilling and pinning.
  • Swing Diameter is the maximum diameter over bearings, clearance must be allowed.