Mil. Spec. Machinable-Bore Single U-Joints


Drill the bores to create custom U-joints that meet strict military standards for material and construction. These U-joints come apart and have a small, centered starter hole on each end to make drilling easy. Because they’re single U-joints, they connect and transfer torque between two shafts that are misaligned at an angle. They have a pin-and-block joint, so they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications. Made of steel with hardened yoke ears for added strength and durability, they handle a good amount of torque.
Drill holes through the U-joint and your shafts and then connect using spring pins. They have a ball-spring oil fitting to keep lubricant in the joint.
Your shafts’ misalignment will affect the speed and torque the U-joint will be able to transmit. The more the shafts are misaligned, the less speed and torque the U-joint will be able to transmit.
For technical drawings and 3-D models, click on a part number.
Torque | |||||||||||||
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For Max. Shaft Dia. | For Max. Shaft Dp. | Joint Dia. | Overall Lg. | Max. Operating Angle | Max. Speed, rpm | Max. Torque, in.-lbs. | 3° Operating Angle | 10° Operating Angle | Joint Type | Includes | Specifications Met | Each | |
Steel | |||||||||||||
1/2" | 1" | 7/8" | 3" | 35° | 1,500 | 1,800 | 345 in.-lbs. @ 300 rpm | 225 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-DTL-20625 Class A | 0000000 | 0000000 |
9/16" | 1 3/16" | 1" | 3 3/8" | 35° | 1,500 | 3,050 | 585 in.-lbs. @ 300 rpm | 380 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-DTL-20625 Class A | 0000000 | 000000 |
3/4" | 1 1/4" | 1 1/4" | 3 3/4" | 35° | 1,500 | 5,500 | 1,055 in.-lbs. @ 300 rpm | 685 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-DTL-20625 Class A | 0000000 | 000000 |
7/8" | 1 5/16" | 1 1/2" | 4 1/4" | 35° | 1,500 | 9,000 | 1,730 in.-lbs. @ 300 rpm | 1,125 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-DTL-20625 Class A | 0000000 | 000000 |
1" | 1 9/16" | 1 3/4" | 5" | 35° | 1,500 | 14,000 | 2,690 in.-lbs. @ 300 rpm | 1,750 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-DTL-20625 Class A | 0000000 | 000000 |
1 3/16" | 1 5/8" | 2" | 5 7/16" | 35° | 1,500 | 22,000 | 4,230 in.-lbs. @ 300 rpm | 2,750 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-DTL-20625 Class A | 0000000 | 000000 |
1 1/2" | 2 1/16" | 2 1/2" | 7" | 35° | 1,500 | 32,000 | 6,150 in.-lbs. @ 300 rpm | 4,000 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-DTL-20625 Class A | 0000000 | 000000 |