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Lovejoy Size D4B Universal Joint, 3/8" Round Bore and 3/8" Round Bore, No Keyway, No Setscrew, 0.75" Outer Diameter, 2.68" Overall Length

5.0 out of 5 stars 1 customer review

Price: $43.00 & FREE Shipping on orders over $49. Details
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Specifications for this item
Brand Name Lovejoy
Part Number 68514416289
UPC 685144162892
Material Type Steel
System of Measurement Inch
Angular Misalignment 25  Degrees
Body Outside Diameter 0.75  inches
Bore Depth 0.88  inches
Bore Diameter 3/8  inches
EAN 0685144162892
Grade 1144
Max Rotational Speed 1750  RPM
Max Torque 768  Inch Pounds
Number of Items 1
Outside Diameter 0.75  inches
Overall Length 2.68  inches
Size 3/8 inches
Trade Size D4B
UNSPSC Code 25173810

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Product Features

  • Single pin and block universal joint for applications with up to 25 degrees angular misalignment and speeds up to 1,750 RPM
  • Compensates for angular misalignments and shaft separation
  • Steel for strength and durability
  • Bored hubs fit onto shafts without the need for machining
  • Operating temperatures range from -30 to 212 degrees F

Product Description

This Lovejoy D Type steel single pin-and-block universal joint with round bored hubs is designed to connect two rotating shafts at angles up to 25 degrees. This universal joint compensates for angular misalignments and has a single joint configuration for high torsional stiffness and torque capacity. The hubs, center block, and pins are made of steel for strength and durability, and the bored hubs fit onto shafts without the need for machining. Operating temperatures range from -30 to 212 degrees F. For optimal wear and extended life, boots (sold separately) are recommended, and boot retaining grooves are standard on this design. This universal joint provides a uniform speed ratio between driving and driven shafts, and is suitable for applications requiring moderate torque transmission, such as compressors, fans, machine tools, printing presses, and textile machinery.

Universal joints (also called U-joints, universal couplings, Cardan joints, Hooke’s joints, or Hardy-Spicer joints) are used to transmit motion and rotational power, or torque, between two shafts that are offset at an angle. Most universal joints consist of two yokes and a middle assembly; the hub end of each yoke attaches to a shaft while the yoke ears attach to and pivot around the middle assembly to accommodate shaft misalignment. The type of middle assembly determines its usage—pin and block joints are suitable for transmitting high torque, needle bearing joints are used to handle high rotational speeds, and ball and socket joints are used in applications requiring low backlash (play between moving parts). The body of the universal joint may include a single joint to accommodate only angular misalignments between shafts, or two joints to accommodate both angular and parallel misalignments. Available in a variety of materials and configurations, universal joints are used in applications including motor vehicles, conveyors, medical and optical devices, forestry and mining equipment, robotics and space exploration, and aeronautics, among others.

Lovejoy manufactures flexible couplings, universal joints, variable speed drives, and other transmission and mechanical power products. The company, founded in 1900, is headquartered in Downers Grove, IL.


Product Details

  • Shipping Weight: 4 ounces (View shipping rates and policies)
  • ASIN: B003TW5NCQ
  • Item model number: LOV D4B U JOINT 3/8X3/8 N KW
  • Average Customer Review: 5.0 out of 5 stars  See all reviews (1 customer review)
  • Amazon Best Sellers Rank: #460,076 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Top Customer Reviews

By Dennis H. Foster on December 20, 2011
Verified Purchase
I guess one was supposed to know how to mount this item on the shaft. There were no instructions with it at all. After figuring out the it was bored ever so slightly smaller than the 3/8" shaft I had, I decided that it needed to be heated to expand it so it would slip onto the shaft. Anyway that's how I did it and then I oiled it since heating it burned off the factory lube. I'm still going to give it 5 stars based on the quality. Very well made and should last a lifetime.
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