Shaft Encoders | McMaster-Carr

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3A001

EAR99

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52 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	5-Pole Micro M12 Plug-In Connection—IO Link

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.

IO Link Communication Protocol—Transmitters with IO link let you set their resolution remotely when connected to a PLC, a human-machine interface (HMI), or a computer.

IP64 Enclosure Rating and IP65 Enclosure Rating—IP-rated transmitters are protected from dust and water.

	Encoders																Connectors
											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		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	———	0


		5-Pole Micro M12 Plug-In Connection—IO Link



				6 mm	Single Turn	5 to 30	150	50	—	12,000	Stainless Steel	Aluminum	IP65	3	M4 × 0.7 mm	No	1 to 10,000	9749T519	000000	4490N15	000000


				10 mm	Single Turn	5 to 30	150	50	—	12,000	Stainless Steel	Aluminum	IP65	3	M4 × 0.7 mm	No	1 to 10,000	9749T521	000000	4490N15	00000

Incremental Optical Encoders with Shaft Opening


Wire Lead Connection—NPN Open Collector	5-Pole Micro M12 Plug-In Connection—IO Link

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.

IO Link Communication Protocol—Transmitters with IO link let you set their resolution remotely when connected to a PLC, a human-machine interface (HMI), or a computer.

IP64 Enclosure Rating and IP65 Enclosure Rating—IP-rated transmitters are protected from dust and water.

	Encoders																				Connectors
														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 Dia.	Mounting Plate Wd.	For Screw Size	No. of	Ctr.-to-Ctr.	Thread Size	Fasteners Included	Choose a Resolution		Each		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	———	0


		3/8"	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	9749T2	000000	———	0


		5-Pole Micro M12 Plug-In Connection—IO Link



				6 mm	Single Turn	5 to 30	150	50	—	12,000	Stainless Steel	Aluminum	IP65	1.43"	—	—	4	—	M2.5 × 0.5 mm	No	1 to 10,000	9749T522	000000	4490N15	000000


				10 mm	Single Turn	5 to 30	150	50	—	12,000	Stainless Steel	Aluminum	IP65	1.43"	—	—	4	—	M2.5 × 0.5 mm	No	1 to 10,000	9749T523	000000	4490N15	00000

Absolute Optical Encoders with Shaft


Wire Lead Connection—Synchronous Serial Interface (SSI)	5-Pole Micro M12 Plug-In Connection—IO Link

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.

IO Link Communication Protocol—Transmitters with IO link let you set their resolution remotely when connected to a PLC, a human-machine interface (HMI), or a computer.

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.

	Encoders															Connectors
										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		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	———	0


		1/4"	Multi-Turn	5 to 32	50	100	12,000	Aluminum	Stainless Steel	IP65	4	M3 × 0.5 mm	No	24	9749T516	000000	———	0
		6 mm	Single Turn	5 to 32	50	100	12,000	Aluminum	Stainless Steel	IP65	4	M3 × 0.5 mm	No	12	9749T517	000000	———	0
		6 mm	Multi-Turn	5 to 32	50	100	12,000	Aluminum	Stainless Steel	IP65	4	M3 × 0.5 mm	No	24	9749T518	000000	———	0


		5-Pole Micro M12 Plug-In Connection—IO Link



				6 mm	Multi-Turn	18 to 30	75	50	12,000	Stainless Steel	Aluminum	IP65	3	M4 × 0.7 mm	No	1 to 31	9749T525	000000	4490N15	000000


				10 mm	Multi-Turn	18 to 30	75	50	12,000	Stainless Steel	Aluminum	IP65	3	M4 × 0.7 mm	No	1 to 31	9749T524	000000	4490N15	00000

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
		3/8"	Single Turn	5 to 24	100	420	8,000	Aluminum	Plastic	2.16"	No. 6	2	1.81"	No	12	9749T513	000000
		3/8"	Multi-Turn	5 to 24	100	420	8,000	Aluminum	Plastic	2.16"	No. 6	2	1.81"	No	24	9749T514	000000

Rotary Encoders

Provide motion feedback to counters, controllers, and motor drives for automated motion control and measurement applications. Also known as encoders, transmitters convert rotary motion to an electrical signal so you can operate your system based on distance, direction, and speed of travel. These transmitters have pull-up resistor output. Since they have two shafts, you can mount them on either side to fit your setup.

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

Aluminum Body and Stainless Steel Shaft


Shown with Wheel and Mounting Bracket (Both Sold Separately)

Quadrature Output Channel—Transmitters with a quadrature output channel must be used with a controller that has quadrature detection to get a 4X resolution increase.

						Shaft			Overall		Mounting Plate		Mounting Holes
	For Counter Function	Encoder Output Channel	Resolution Increase	For Max. Shaft Speed, rpm	Input Voltage, V DC	Coupling Req.	Dia.	Lg.	Lg.	Ht.	Lg.	Wd.	Ctr.-to-Ctr.	Thread Size	Choose a Resolution		Each
Single Output Channel—250 mA Output Current



		Up	A	2X	6,000	5 to 28	Yes	3/8"	3/4"	3.95"	2.93"	2 1/4"	2 1/4"	1.41"	6-32	10, 60, 100, 120, 500, 600, 1,200	16695T46	0000000


		Quadrature Output Channel—250 mA Output Current



				Up and Down	A, B	2X, 4X	6,000	5 to 28	Yes	3/8"	3/4"	3.95"	2.93"	2 1/4"	2 1/4"	1.41"	6-32	10, 60, 100, 120, 500, 600, 1,200	16695T47	000000

Accessories for Rotary Encoders

Mount a wheel (not included) to use transmitters to measure lengths.

Use cables (not included) to connect transmitters to counters and controllers.

		Each
12" Circumference Polyurethane Wheel (3.82" Dia. × 0.7" Wd.)	16695T28	0000000
Aluminum Mounting Bracket (3 1/2" Lg. × 2 1/2" Wd. × 4 1/2" Ht.)	16695T13	000000
10ft. Cable	16695T14	000000
20ft. Cable	16695T27	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


	3/8"	Line Driver, NPN Open Collector, Push-Pull	5 to 30	65	20	8,000	Aluminum	Aluminum	IP67	10-32	No	1 to 65,536	9924N122	000000

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


	3/8"	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	9924N124	000000

Rotary Encoder Programming Kits

Data Connection		Each
USB-A	9924N125	0000000

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.

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.

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 17 Frame Size

				31	3,000	0.1	2.2	12 to 48	1.8°	1 to 1/256	1 Analog-Input, 3 Digital-Inputs, 1 Digital-Output	3.7"	1.7"	3"	5 mm	22 mm	0.84"	D-Profile	35	100	6627T104	0000000


				54	3,000	0.1	2.2	12 to 48	1.8°	1 to 1/256	1 Analog-Input, 3 Digital-Inputs, 1 Digital-Output	3.9"	1.7"	3"	5 mm	22 mm	0.84"	D-Profile	35	100	6627T105	000000
				68	3,000	0.1	2.2	12 to 48	1.8°	1 to 1/256	1 Analog-Input, 3 Digital-Inputs, 1 Digital-Output	4.2"	1.7"	3"	5 mm	22 mm	0.84"	D-Profile	35	100	6627T106	000000




						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	000000


						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




								NEMA 24 Frame Size

								340	2,400	3	5	12 to 70	1.8°	1 to 1/256	1 Analog-Input, 4 Digital-Inputs/Outputs	4.9"	2.4"	3.8"	8 mm	21 mm	1.18"	D-Profile	35	100	6627T107	00000000

Sanitary Rotary Encoders

Also known as encoders, these sanitary transmitters convey motion to an electrical signal that conveys distance, direction, and speed. They’re often used in control systems to automate servomotors, robotics, and assembly machines in sanitary environments such as food and pharmaceutical plants. Made of corrosion-resistant stainless steel, they won’t rust from frequent washdowns with harsh cleaners. These transmitters are sealed and have a highly polished surface, leaving no room for bacteria to grow and making them easier to clean. They’re rated IP67 for protection from dust, high-pressure jets of water, and submersion in up to a meter of water for 30 minutes.

To achieve a 4X resolution increase, use these transmitters with a controller that has quadrature detection.

Use a flexible shaft coupling to connect the transmitter shaft to a drive shaft.

316 Stainless Steel Body and 303 Stainless Steel Shaft

							Shaft			Overall		Mounting Plate		Mounting Holes
	For Counter Function	Encoder Output Channel	Resolution	Resolution Increase	For Max. Shaft Speed, rpm	Input Voltage, V DC	Coupling Req.	Dia.	Lg.	Lg.	Ht.	Lg.	Wd.	No. of	Ctr.-to-Ctr.	Dia.	Certification		Each
Quadrature with Index Output Channel—20 mA Output Current



		Up and Down	A, B, Z	600	2X, 4X	8,000	4.75 to 28	Yes	3/8"	1 1/16"	3.175"	3 1/4"	2 1/2"	2 1/2"	4	2.06"	7/32"	CE Marked	4136N111	000000000


		Up and Down	A, B, Z	3,600	2X, 4X	8,000	4.75 to 28	Yes	3/8"	1 1/16"	3.175"	3 1/4"	2 1/2"	2 1/2"	4	2.06"	7/32"	CE Marked	4136N116	00000000

Cables

Lg.		Each
32 3/4"	4136N127	0000000

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

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.

										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 17 Frame Size

				26.9	1,500	0.67	5	1.8°	Bipolar	Incremental	1,000	4	2.6"	2.3"	1.7"	5 mm	22 mm	0.84"	D-Profile	2	0	120	6627T361	0000000


				39	900	0.62	5	1.8°	Bipolar	Incremental	1,000	4	2.8"	2.3"	1.7"	5 mm	22 mm	0.84"	Solid	2	0	120	6627T371	000000
				64	750	0.7	5	1.8°	Bipolar	Incremental	1,000	4	3"	2.3"	1.7"	5 mm	22 mm	0.84"	Solid	2	0	120	6627T381	000000
				70.8	3,000	2	5	1.8°	Bipolar	Incremental	1,000	4	3.2"	2.3"	1.7"	5 mm	22 mm	0.84"	D-Profile	2	0	120	6627T391	000000
				83.5	825	1.05	5	1.8°	Bipolar	Incremental	1,000	4	3.5"	2.3"	1.7"	5 mm	22 mm	0.84"	D-Profile	2	0	120	6627T411	000000
				124.6	1,400	2	5	1.8°	Bipolar	Incremental	1,000	4	3.9"	2.3"	1.7"	5 mm	22 mm	0.84"	D-Profile	2	0	120	6627T421	000000




						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	000000


						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