Encoder Wheels | McMaster-Carr

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Encoder Output Channel Type

Quadrature

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Single

System of Measurement

Shaft Diameter

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Measurement Unit

Encoder Output Signal

Mount Type

Wheel Diameter

Number of Wheels

Output Current

20 mA

250 mA

Gear Box Input Connection

Shaft

Shaft Opening

For Counter Function

Up and Down

Number of Mounting Holes

Environment

Dusty

Submersible

Export Control Classification Number (ECCN)

3A001

EAR99

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

Yes

DFARS Specialty Metals

REACH

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Compliant with Exemptions

Not Compliant

Encoder Output Channel

For Maximum Shaft Speed

Material

62 Products

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

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

Measuring Wheels


Style A	Style B	Style C	Style D

Style E	Style F	Style G	Style H

Style J	Style K

Roll these wheels along a surface to measure long distances. Choose a wheel diameter of 11.5” or larger for uneven surfaces. Wheels with a diameter less than 11.5” are good for smooth, hard surfaces.

Analog Display—Wheels with an analog display don't rely on a power source to count, so they won't lose power while you're measuring. However, you can't change the display to different units of measure.

Digital Display—Wheels with a digital display give you the option to show measurements in inch or metric units. Because they run on batteries, they can lose power while measuring.

Steel Wheel—Steel wheels are the most durable wheels in our offering, so they stand up to rough terrain. Their added weight gives them stability, so they’re good at staying accurate on uneven surfaces.

Aluminum Wheel—Aluminum wheels are lightweight yet durable and can be used on rough terrain.

Plastic Wheel—Plastic wheels are lightweight and work best on smooth, hard surfaces.

Style K—Style K operates on a nonreplaceable battery with a minimum 10-year life.

Handle Display—Wheels with a display on the handle give you easy access to the digital counter and its controls to let you change the settings while you measure.

Wheel Display—Those with a display on the wheel keep both the wheel and counter in your line of sight, so you can guide and stop the wheel for an accurate measurement.

Folding Handle—Wheels with a folding handle can be folded up for portability and storage in small spaces.

Telescoping Handle—Wheels with a telescoping handle let you change the length of the handle. When set to shorter lengths, you can use them on elevated surfaces such as countertops.

	Measuring Wheels														Batteries
						Tread
	Style	Wheel Dia.	Display Location	Max. Distance Measured	Measurement Unit	Pattern	Texture	Handle Type	Ht.	Folded Ht.	Measuring Functions	Batteries Included		Each	Pkg. Qty.		Pkg.
Analog Display







				Steel Wheel with Rubber Tread

				A	12 1/2"	Wheel	9,999 m	Meters	Solid	—	Folding	44"	20 1/2"	Subtract Zero Reset	No	2253A101	0000000	—	———	0


				B	11 1/2"	Wheel	99,999 ft.	Feet	Solid	—	Folding	44"	23"	Add Zero Reset	No	1969A26	000000	—	———	0
				B	15 1/2"	Wheel	99,999 ft.	Feet	Solid	—	Folding	44"	23"	Add Zero Reset	No	1969A27	000000	—	———	0




						Aluminum Wheel with Rubber Tread

						C	12"	Wheel	9,999 ft.	Feet/Inches	Solid	—	Telescoping	24" to 42 1/2"	—	Add Zero Reset	No	1969A24	00000	—	———	0




								Plastic Wheel with Rubber Tread

								D	12 1/2"	Wheel	9,999 ft.	Feet/Inches	Solid	—	Telescoping	24" to 40"	—	Subtract Zero Reset	No	1969A102	00000	—	———	0


								E	12"	Wheel	9,999 ft.	Feet/Inches	Solid	—	Folding	39"	20"	Subtract Zero Reset	No	1969A101	000000	—	———	0
								F	3 3/4"	Wheel	9,999 m	Decimeters/Meters	Solid	—	Telescoping	18" to 37 1/2"	—	Subtract Zero Reset	No	2253A102	00000	—	———	0
								F	4"	Wheel	9,999 ft.	Feet/Inches	Solid	—	Telescoping	18" to 36 1/2"	—	Add Zero Reset	No	1969A11	00000	—	———	0
								G	4"	Wheel	9,999 ft.	Feet/Inches	Solid	—	Telescoping	18" to 36 1/2"	—	Add Zero Reset	No	1969A13	00000	—	———	0


								Digital Display







												Steel Wheel with Rubber Tread

												H	15 1/2"	Wheel	99,999 ft.	Feet/Inches/Meters	Solid	—	Folding	43"	22"	Calculate Area Permanent Memory Zero Reset	No	2253A41	000000	4	71455K53	00000




														Plastic Wheel with Rubber Tread

														J	12"	Handle	99,999 ft.	Feet/Inches/Centimeters/Meters	—	Textured	Telescoping	24 1/4" to 38 3/16"	—	Data Hold Permanent Memory	Yes	2253A103	000000	4	71455K62	0000


														K	12 1/2"	Wheel	9,999 ft.	Feet/Yards/Meters	Solid	—	Telescoping	27" to 40"	—	Zero Reset	Yes	2253A37	000000	—	———	0

Measuring Wheel Cases

		Each
Fabric Carrying Case for Styles A, B, C & D	2017A7	000000

Flat-Material Measuring Wheels


1 Wheel	2 Wheels


Backward	Forward

Measure sheets, rolls, and strips using these wheels and their attached counters.

Aluminum Wheel—Aluminum wheels are for high temperature processes and coarse materials such as sandpaper. The surface is knurled for good contact.

Plastic Wheel—Plastic wheels are for smooth materials such as paper and cloth.

	Measuring Wheels															Replacement Measuring Wheel Counters		Replacement Wheels
			Max.				Overall			Mounting Hole
	No. of Wheels	Material Travel Direction	Lg. Measured	Speed, fpm	Wheel Circumference	Tread Wd.	Lg.	Wd.	Ht.	No. of	Dia.	Ctr.-to-Ctr. Lg.	Measuring Functions		Each		Each		Each
Feet/Inches







				Aluminum Wheel

				1	Backward	999,999 ft.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T31	0000000	8677T67	0000000	1674T97	0000000


				1	Forward	999,999 ft.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T13	000000	8677T68	000000	1674T97	000000




						Plastic Wheel with Rubber Tread

						1	Backward	999,999 ft.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T32	000000	8677T67	000000	1674T98	00000


						1	Forward	999,999 ft.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T14	000000	8677T68	000000	1674T98	00000


						Feet







										Aluminum Wheel

										1	Backward	999,999 ft.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T61	000000	8677T61	000000	1674T97	000000


										1	Forward	999,999 ft.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T62	000000	8677T62	000000	1674T97	000000
										2	Backward	999,999 ft.	4,500	18"	5/8"	5 3/4"	19"	7 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	8677T32	000000	8677T63	000000	8677T72	000000
										2	Forward	999,999 ft.	4,500	18"	5/8"	5 3/4"	19"	7 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	8677T31	000000	8677T64	000000	8677T72	000000




												Plastic Wheel with Rubber Tread

												1	Backward	999,999 ft.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T64	000000	8677T61	000000	1674T98	00000


												1	Forward	999,999 ft.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T65	000000	8677T62	000000	1674T98	00000
												2	Backward	999,999 ft.	4,500	18"	5/8"	5 3/4"	19"	7 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	8677T94	000000	8677T63	000000	8677T73	00000
												2	Forward	999,999 ft.	4,500	18"	5/8"	5 3/4"	19"	7 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	8677T93	000000	8677T64	000000	8677T73	00000


												Yards







																Aluminum Wheel

1	Backward															999,999 yd.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T63	000000	8677T65	000000	1674T97	000000


1	Forward															999,999 yd.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T26	000000	8677T66	000000	1674T97	000000




		Plastic Wheel with Rubber Tread

		1	Backward													999,999 yd.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T66	000000	8677T65	000000	1674T98	00000


		1	Forward													999,999 yd.	3,000	12"	5/8"	3 13/16"	19"	6 1/2"	2	3/8"	1 1/2"	Add Subtract Zero Reset	1674T27	000000	8677T66	000000	1674T98	00000

Accessories and Replacements for Measuring Wheels

Includes		Each
Handle, Shaft, Springs	8677T69	00000

Component		Each
Counter Mounting Bracket	8677T81	000000

Component		Each
Measurer Mounting Bracket	8677T82	000000

Component	Includes		Each
Mounting Kit	Counter Mounting Bracket, Lug, Measurer Mounting Bracket, Rod	8677T83	0000000

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

Digital Flat-Material Measuring Wheels for Saws

Accurately cut 2×4s, boards, and other materials without the hassle of a tape measure or creating jigs as a stop. As you slide material along your saw fence, the digital counter measures its length, so you know what length you’re cutting. These measurers clamp onto most saw fences. Program the blade offset, including its angle, to account for the distance between the measurer and the blade, so you get an accurate measurement.

	Measuring Wheels														Batteries
				Max.					Overall
	No. of Wheels	Material Travel Direction	Accuracy	Lg. Measured, ft.	Speed, fpm	Clamping Clearance	Wheel Circumference	Tread Wd.	Lg.	Wd.	Ht.	Batteries Included		Each	Pkg. Qty.		Pkg.
Feet/Inches/Millimeters/Centimeters/Meters







				Plastic Wheel with Rubber Tread

				1	Side to Side	±0.029", ±0.75 mm	99	780	3/8"	6"	1/2"	6"	3"	4 1/2"	No	4857N11	0000000	4	71455K53	00000

Saw Fence Extensions

Saw fence extensions are required for saw fences shorter than 95 mm high. There must be at least two holes in the fence on each side of the saw blade to install these adapters.

Lg.	Ht.	Thk.		Each
23"	3 11/16"	1/4"	4857N12	000000