1⁄4" Diameter Shaft Rotary Encoders

Filter by

Gear Box Input Connection

Resolution

System of Measurement

Shaft Diameter

Component

Electrical Connection

Transmitter Type

Absolute Optical Encoder

Incremental Optical Encoder

Shaft Type

Mount Type

Number of Mounting Holes

Input Voltage

Encoder Output Channel Type

Quadrature

Quadrature with Index

Environment

Enclosure Rating

Number of Output Channels

Body Diameter

1 1/2"

2 1/4"

2 5/8"

Number of Turns

Number of Terminals

Wire Connection

Tab

Wire Leads

Encoder Output Channel

Output Current

20 mA

100 mA

420 mA

Export Control Classification Number (ECCN)

3A001

EAR99

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

Yes

RoHS

Compliant

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Exempt

Forward

How can we improve?

29 Products

Compact Rotary Encoders

Track distance, direction, and speed in tight spaces on machinery. Cylindrical and about half the size of standard position-measuring transmitters, these are often used on robot arms and crowded conveyors. Also known as encoders, they send motion data to your system by converting rotary motion into an electrical signal.

Incremental Optical Encoders with Shaft

Wire Lead

Connection—NPN Open

Collector

Incremental transmitters track how much a rotating shaft has turned relative to a reference point. They need to be reset after a power loss.

Transmitters with a shaft connect to a motor’s shaft with a flexible shaft coupling to fit different diameters.

NPN Open Collector—Transmitters with an NPN open collector pair with a resistor. Use these transmitters with a controller that has quadrature detection to get a 4X resolution increase.

IP64 Enclosure Rating—IP-rated transmitters are protected from dust and water.

											Mounting Holes
	Shaft Dia.	Rotary Encoder Type	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	Encoder Output Channel Type	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	No. of	Thread Size	Fasteners Included	Choose a Resolution		Each
Wire Lead Connection—NPN Open Collector



		1/4"	Single Turn	5 to 28	65	20	Quadrature with Index	8,000	Aluminum	Plastic	IP64	3	M3 × 0.5 mm	No	500, 1,000, 2,000, 2,500	9749T3	0000000

Incremental Optical Encoders with Shaft Opening

Wire Lead

Connection—NPN

Open Collector

Incremental transmitters track how much a rotating shaft has turned relative to a reference point. They need to be reset after a power loss.

Transmitters with a shaft opening slide onto your motor's shaft. Their mounting plate flexes to compensate for your motor's vibration.

NPN Open Collector—Transmitters with an NPN open collector pair with a resistor. Use these transmitters with a controller that has quadrature detection to get a 4X resolution increase.

IP64 Enclosure Rating—IP-rated transmitters are protected from dust and water.

													Mounting Holes
	For Shaft Dia.	Rotary Encoder Type	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	Encoder Output Channel Type	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	Mounting Plate Wd.	For Screw Size	No. of	Ctr.-to-Ctr.	Fasteners Included	Choose a Resolution		Each
Wire Lead Connection—NPN Open Collector



		1/4"	Single Turn	5 to 28	65	20	Quadrature with Index	8,000	Aluminum	Plastic	IP64	2.16"	No. 6	2	1.81"	No	500, 1,000, 2,000, 2,500	9749T1	0000000

Absolute Optical Encoders with Shaft

Wire Lead

Connection—Synchronous

Serial Interface (SSI)

Absolute transmitters give you the exact position of the shaft, even after a power loss.

Transmitters with a shaft connect to a motor’s shaft with a flexible shaft coupling to fit different diameters.

Multi-Turn Rotary Encoder—Multi-turn absolute transmitters count how many full turns a shaft makes. They’re often used to keep print rollers aligned over multiple rotations.

IP65 Enclosure Rating—IP-rated transmitters are protected from dust and water.

										Mounting Holes
	Shaft Dia.	Rotary Encoder Type	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	No. of	Thread Size	Fasteners Included	Bit Resolution, bit		Each
Wire Lead Connection—Synchronous Serial Interface (SSI)



		1/4"	Single Turn	5 to 32	50	100	12,000	Aluminum	Stainless Steel	IP65	4	M3 × 0.5 mm	No	12	9749T515	0000000


		1/4"	Multi-Turn	5 to 32	50	100	12,000	Aluminum	Stainless Steel	IP65	4	M3 × 0.5 mm	No	24	9749T516	000000

Absolute Optical Encoders with Shaft Opening

Wire Lead

Connection—Synchronous

Serial Interface (SSI)

Absolute transmitters give you the exact position of the shaft, even after a power loss.

Transmitters with a shaft opening slide onto your motor's shaft. Their mounting plate flexes to compensate for your motor's vibration.

Multi-Turn Rotary Encoder—Multi-turn absolute transmitters count how many full turns a shaft makes. They’re often used to keep print rollers aligned over multiple rotations.

											Mounting Holes
	For Shaft Dia.	Rotary Encoder Type	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	For Max. Shaft Speed, rpm	Body Material	Housing Material	Mounting Plate Wd.	For Screw Size	No. of	Ctr.-to-Ctr.	Fasteners Included	Bit Resolution, bit		Each
Wire Lead Connection—Synchronous Serial Interface (SSI)



		1/4"	Single Turn	5 to 24	100	420	8,000	Aluminum	Plastic	2.16"	No. 6	2	1.81"	No	12	9749T511	0000000


		1/4"	Multi-Turn	5 to 24	100	420	8,000	Aluminum	Plastic	2.16"	No. 6	2	1.81"	No	24	9749T512	000000

Rotary Encoder Kits


Shown with Wheel (Sold Separately)

In addition to a transmitter, these kits include a 6 _1/2-ft. cable and a mounting bracket. Also known as encoders, transmitters convert motion to an electrical signal to indicate distance, direction, and speed in process control and metering applications. These kits are commonly used to monitor the position or velocity of rotating equipment. You can also mount a wheel (not included) to measure distance in linear applications. Transmitters must be used with a controller that has quadrature detection to get a 4X resolution increase. Output channel Z is also known as an index channel.

Use a flexible shaft coupling (not included) to connect the transmitter shaft to a drive shaft.

	Encoder Output Channel	Resolution Increase	For Max. Shaft Speed, rpm	Input Voltage, V DC	Output Current, mA	Resistor Included	Body Material	Shaft Material	Fasteners Included	Fasteners Req.	For Mounting Screw Size	Choose a Resolution		Each
Quadrature with Index Output Channel



	Up and Down	A, B, Z	2X, 4X	6,000	5 to 28	20	No	Plastic	Stainless Steel	No	Yes	1/4"	500, 600, 1,000, 1,800, 2,500	16695T57	0000000

Wheels

		Each
6" Circumference Polyurethane Wheel (1.91" Dia. × 1/4" Wd.)	16695T56	000000

Programmable Rotary Encoders

With adjustable settings for resolution and output type, these transmitters can be programmed to suit your changing processes. Also known as encoders, they convert a shaft’s rotary motion into an electrical signal that indicates distance, direction, and speed. They’re rated IP67, so they can withstand temporary submersion in water.

Encoders with Shaft

Transmitters with a shaft connect to motor shafts with a flexible shaft coupling, so they can be adapted to different diameters.

	Encoder Output Signal	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	Mounting Hole Thread Size	Fasteners Included	Resolution		Each
Incremental Optical Encoder



	1/4"	Line Driver, NPN Open Collector, Push-Pull	5 to 30	65	20	8,000	Aluminum	Aluminum	IP67	10-32	No	1 to 65,536	9924N121	0000000

Rotary Encoder Programming Kits

You’ll need a programming kit (sold separately) to set up these transmitters. They include software stored on a flash drive, as well as a cable and USB adapter for connecting your transmitter to a computer. The software requires a Windows 7 or higher operating system.

Data Connection		Each
USB-A	9924N125	0000000

Encoders with Shaft Opening

Transmitters with a shaft opening can be mounted anywhere along a motor shaft—just slide them on. They have a flexible mounting plate that compensates for shaft misalignment and vibration.

	Encoder Output Signal	Input Voltage, V DC	Max. Input Current, mA	Output Current, mA	For Max. Shaft Speed, rpm	Body Material	Housing Material	Enclosure Rating	Mounting Plate Wd.	For Screw Size	Fasteners Included	Resolution		Each
Incremental Optical Encoder



	1/4"	Line Driver, NPN Open Collector, Push-Pull	5 to 30	65	20	6,000	Aluminum	Aluminum	IP67	2.83"	No. 6	No	1 to 65,536	9924N123	0000000

Rotary Encoder Programming Kits

Data Connection		Each
USB-A	9924N125	0000000

Potentiometers


Style A	Style B	Style C	Style D	Style F

Vary electrical flow to control speed, volume, and light intensity. The number of turns affects the resolution—the higher the number, the better the control. Also known as variable output switches. A knob is required (not included).

Potentiometers


Style A	Style B	Style C	Style D

Style A—Style A potentiometers are also known as gangable potentiometers. They can be linked to each other, so you can control multiple potentiometers from a single source.

IP65 Enclosure Rating—IP65 rated switches are protected against washdowns.

							Shaft
Style	No. of Turns	Resolution	Wattage @ Voltage	For Panel Cutout Dia.	Dp. Behind Panel	Dia.	Dia.	Lg.	Housing Material	Wire Connection	No. of Terminals	Enclosure Rating	Choose a Maximum Resistance, kohm		Each
A	3	33%	1 W @ 224V AC	7/16"	3/4"	7/8"	1/4"	1/2"	Plastic	Tab	3	IP40	1, 5, 10	7436K46	000000
B	5	20%	1.5 W @ 273V AC	7/16"	3/4"	7/8"	1/4"	1/2"	Plastic	Tab	3	IP40	1, 5, 10	7436K34	00000
B	10	10%	2 W @ 325V AC	7/16"	1"	7/8"	1/4"	1/2"	Plastic	Tab	3	IP65	1, 5, 10	7436K42	00000
B	10	10%	2 W @ 447V AC	7/16"	3/4"	7/8"	1/4"	1/2"	Plastic	Tab	3	IP40	1, 5, 10	7436K32	00000
B	10	10%	2 W @ 450V AC	7/16"	3/4"	7/8"	1/4"	1/2"	Plastic	Tab	3	IP40	1, 5, 10, 20	7436K31	00000
C	1	100%	1 W @ 300V AC	7/16"	7/16"	7/8"	1/4"	1/2"	Plastic	Tab	3	IP40	1, 5, 10, 20	7436K37	00000
D	10	10%	5 W @ 1,000V AC	7/16"	1 3/4"	1 13/16"	1/4"	1/2"	Plastic	Tab	3	IP40	1, 5, 10	7436K33	000000

Potentiometer Panel Seals

		Each
Gray Panel Seal	70205K21	00000
Black Panel Seal	70205K821	0000

Potentiometers with Ball Bearings

Style F

Switches with ball bearings have a smoother rotation and a longer service life than other potentiometers.

							Shaft
Style	No. of Turns	Resolution	Wattage @ Voltage	For Panel Cutout Dia.	Dp. Behind Panel	Dia.	Dia.	Lg.	Housing Material	Wire Connection	No. of Terminals	Enclosure Rating	Choose a Maximum Resistance, kohm		Each
F	1	100%	2 W @ 350V AC	7/16"	5/8"	2"	1/4"	3/8"	Plastic	Tab	3	IP40	5, 10	7436K44	0000000

Potentiometer Panel Seals

		Each
Gray Panel Seal	70205K21	00000
Black Panel Seal	70205K821	0000

Stepper Motors

Motor/Encoders

To improve positioning accuracy, these stepper motors have a built-in encoder that monitors the real-time speed and position of the shaft. It sends that data to a controller (not included), which adjusts or stops the shaft if it isn’t in the right place. This makes them useful when relative positioning is critical, such as when coordinating motion between two motors. Stepper motors are good for precise, repetitive movements. Similar to the hands of a clock, their shaft turns in small, equal increments for smooth motion. When the shaft stops, it holds its position even when a counteracting force is applied to the load. All are bipolar hybrid stepper motors, so the current can flow in both directions. This helps them deliver higher torque, precision, and efficiency than unipolar stepper motors.

All motors require a controller and drive (not included).

2 Shafts—When relative positioning is critical, such as coordinating motion in a multi-axis system, choose a motor with two shafts and mount an encoder (not included) on one of them. The encoder monitors the position of the shaft and reports back to the controller.

Maximum Holding Torque—Holding torque is the force needed to move the shaft out of position when it is stationary. When the shaft is in motion, torque generally decreases as speed increases. Use a torque-speed curve to confirm which motor will work for your application. Click on a part number and select “Product Detail” to view the curve for a motor.

Full Step Increment—Full step increment is the rotation of the shaft from one position to the next. A smaller full step increment means the rotor has more teeth, producing smoother and more precise motion. 1.8° is considered standard.

										Overall			Shaft					Temp. Range, ° F
	Max. Holding Torque, in·ozf	Max. Rotation Speed, rpm	Max. Current per Phase, amp	Voltage, V DC	Full Step Increment	Stepper Motor Polarity	Encoder Positioning Type	No. of Counts per Rev.	No. of Wire Leads	Lg.	Wd.	Ht.	Dia.	Lg.	Ctr.-to-Base Lg.	Type	No. of Shafts	Min.	Max.		Each
Square Body







				NEMA 23 Frame Size

				181	600	2.8	5	1.8°	Bipolar	Incremental	1,000	4	3.7"	2.6"	2.3"	1/4"	3/4"	1.13"	D-Profile	2	0	120	6627T441	0000000


				237	525	4	5	1.8°	Bipolar	Incremental	1,000	4	4.6"	2.6"	2.3"	1/4"	3/4"	1.13"	D-Profile	2	0	120	6627T451	000000
				355	900	6	5	1.8°	Bipolar	Incremental	1,000	4	4.9"	2.6"	2.3"	1/4"	3/4"	1.13"	D-Profile	2	0	120	6627T461	000000
				467.3	300	2	5	1.8°	Bipolar	Incremental	1,000	4	4.5"	2.5"	2.3"	1/4"	3/4"	1.11"	D-Profile	2	0	120	6627T471	000000
				600.4	1,300	6.5	5	1.8°	Bipolar	Incremental	1,000	4	4.9"	2.6"	2.3"	1/4"	3/4"	1.13"	D-Profile	2	0	120	6627T481	000000

Stepper Motors with Integrated Motion Control

With a built-in controller and drive, these stepper motors come ready to program and operate. Connect them to a computer and use the free downloadable software to set them up. After that, the controller can store and run programs on its own. The controller communicates to the drive which directs the motor’s shaft to move in small, equal increments. When the shaft stops, it holds its position even when a counteracting force is applied to the load. All are bipolar hybrid stepper motors, which deliver greater torque, precision, and efficiency than other types of stepper motors.

Encoders—When relative positioning is critical, such as coordinating motion in a multi-axis system, choose a motor with an encoder. The encoder monitors the position of the shaft and reports back to the controller.

Step Resolution—You can adjust the step resolution down to _1/256 of a full step, which translates to 51,200 microsteps per revolution. Increasing the number of steps directs an even more precise position and reduces the step-step-step motion to mimic a smooth, continuous rotation. The higher the number of step resolution settings, the greater the flexibility you have for determining the size of the motor’s step.

			Current per Phase, amp						Overall			Shaft				Temp. Range, ° F
	Max. Holding Torque, in·ozf	Max. Rotation Speed, rpm	Min.	Max.	Voltage, V DC	Full Step Increment	Step Resolution	No. of Inputs/Outputs	Lg.	Wd.	Ht.	Dia.	Lg.	Ctr.-to-Base Lg.	Type	Min.	Max.		Each
Motor/Controller/Drive/Encoders







				NEMA 23 Frame Size

				100.5	2,475	0.3	3	12 to 40	1.8°	1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256	4 Digital-Inputs/Outputs	3.8"	2.3"	2.3"	1/4"	3/4"	1.13"	D-Profile	0	120	6627T101	0000000


				182.5	2,000	0.3	3	12 to 40	1.8°	1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256	4 Digital-Inputs/Outputs	4.3"	2.3"	2.3"	1/4"	3/4"	1.13"	D-Profile	0	120	6627T102	000000
				294.5	820	0.3	3	12 to 40	1.8°	1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256	4 Digital-Inputs/Outputs	5.1"	2.3"	2.3"	1/4"	3/4"	1.13"	D-Profile	0	120	6627T103	000000