M4 Rod Alignment Couplers

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System of Measurement

Body Material

Shaft Diameter

Misalignment Angle

Material

Length

Shaft Mount Type

Overall Length

Thread Pitch

Shaft Type

Maximum Operating Angle

45°

Maximum Pull Force

Less than 10,000 lbf

Export Control Classification Number (ECCN)

EAR99

REACH

Not Compliant

RoHS

Compliant

Compliant with Exemptions

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Shaft Depth

7/8"

DFARS Specialty Metals

Set Screw Material

U-Joint Type

Joint Type

Cover Material

Joint Diameter

Lubrication

3 Products

Rod Alignment Couplers

Angle of Misalignment

Increase cylinder life by fixing alignment problems between air or hydraulic cylinders and driven components. Couplers have a threaded end that moves to compensate for the angle of misalignment, reducing wear on cylinder bearings and seals. Couplers have a male and female end.

	Body Material	OD, mm	Overall Lg., mm	Max. Pull Force, lbf		Each
5° of Misalignment



	M4 × 0.7 mm	Steel	12	26	12	6740K5	000000


	M4 × 0.7 mm	304 Stainless Steel	14.4	26	17	1101K21	00000

Precision Single U-Joints

Pin-and-Block

Joint

Pin-and-Block Joint

A good choice when you need accurate and repeatable motion, these U-joints have zero backlash (no play), so there’s no motion lost when your shafts change direction. This keeps machines running smoothly. They’re single U-joints, so they connect and transfer torque between shafts that are misaligned at an angle.

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.

Pin-and-Block Joint—Pin-and-block U-joints work well in most applications since they handle higher torque at lower speeds than joints with ball bearings.

Acetal—Acetal U-joints weigh less than metal U-joints. They protect components in your system from stray electrical currents by blocking the flow of electricity between your shafts.

Set-Screw Shaft Mount—U-joints that connect with set screws don’t require you to drill any holes.

Lubrication Not Required—U-joints that don’t require lubrication are often used with optical devices and other sensitive equipment because they're less likely to attract dust and debris compared to lubricated U-joints. They’re also easier to maintain.

	For Shaft							Torque
	Dia.	Dp.	Joint Dia.	Overall Lg.	Max. Operating Angle	Max. Rotation Speed, rpm	Max. Torque, in·lbf	5° Operating Angle	10° Operating Angle	Shaft Mount Type	Lubrication		Each
Pin-and-Block Joint







				Acetal

				3/8"	7/8"	11/16"	2.66"	45°	1,000	60	Not Rated	Not Rated	Set Screw	Not Required	60625K87	000000