Speed Controls | McMaster-Carr

	For Outlet Tube OD For Outlet Tube OD

	Input Voltage Input Voltage

	Inlet Pipe Size Inlet Pipe Size

	Output Voltage Output Voltage

	Inlet Thread Type Inlet Thread Type

	ISO Designation ISO Designation

	Meter Out
	Meter In

	Maximum Horsepower Maximum Horsepower

1/3 hp

1 hp

2 hp

	Outlet Connection Type Outlet Connection Type


Tube	Pipe

	Shape Shape

	90° Elbow
	Straight
	Adjustable-Angle Elbow

	Environment Environment

	Minimum Horsepower Minimum Horsepower

	Inlet Connection Type Inlet Connection Type


Pipe	Tube

	Input Electrical Phase Input Electrical Phase

Single

Three

	Flow Control Type Flow Control Type

Exiting Cylinder

Entering Cylinder

	Reversing Capability Reversing Capability

Nonreversing

Reversing

	For Inlet Tube OD For Inlet Tube OD

	Current Current

	Body Material Body Material

	Environmental Rating Environmental Rating

NEC Class I Divisions 1, 2
Groups C, D

NEC Class II Divisions 1, 2
Groups E, F, G

	Maximum Resistance Maximum Resistance

	Power Power

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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567 Products

Switches

Washdown Enclosed AC to DC Motor Speed Controls

A NEMA 4X rated enclosure protects these controls from corrosion and washdowns.

Reversing Washdown Enclosed
AC to DC Motor Speed Controls

Use these controls with motors that run forward and backward, such as motors for conveyor belts.

Enclosed AC to DC Motor Speed Controls

Reversing Enclosed AC to DC Motor Speed Controls

Use these controls with motors that run forward and backward, such as motors for conveyor belts.

AC to DC Motor Speed Controls

Convert AC input voltage into DC output voltage and control the speed of permanent-magnet DC motors.

Programmable Three-Phase AC Motor Speed Controls

Set these controls to automatically adjust motor speed.

DIN-Rail Mount Programmable
Three-Phase AC Motor Speed Controls

Mount these controls to DIN rail inside a control panel.

Washdown Programmable
Three-Phase AC Motor Speed Controls

Rated NEMA 4, these controls are protected from washdowns.

Three-Phase AC Motor Speed Controls

Manually control a motor's speed.

Low-Voltage DC Motor Speed Controls

Control the speed of low-voltage permanent-magnet DC motors.

Potentiometers

Vary electrical flow to control speed, volume, and light intensity. Also known as variable output switches or rheostats.

Digital Potentiometers

More precise than analog potentiometers, these have a three-digit display that is easy to read.

Harsh Environment Potentiometers

Rated NEMA 4X and 13, these potentiometers are protected from debris, washdowns, and oil/coolant spraying.

Variable-Speed Foot Switches

When the pedal is pressed, the built-in potentiometer adjusts the resistance to vary the speed for motor drives.

Air Flow Control Valves

Elbow Air Flow Control Valves

Mount these valves directly to cylinder ports, eliminating additional tubing between the cylinder and valve for better control than inline valves. They control the speed of air-powered equipment by adjusting the volume of airflow.

Inline Air Flow Control Valves

Designed to be mounted inline, these valves can be installed in an easy-to-reach location along your line. They control the speed of air-powered equipment by adjusting the volume of airflow.

Flexible-Mount Air Flow Control Valves

A swiveling outlet port on these valves makes connections from any direction. They control the speed of air-powered equipment by adjusting the volume of airflow.

Elbow Air Flow Control Valves with Flow Indicator

A numeric indicator provides a relative measure of airflow, similar to the volume dial on a speaker, so it's easy to set the same flow rate with each use. Mount them directly to cylinder ports, eliminating additional tubing between the cylinder and valve for better control than inline valves. They control the speed of air-powered equipment by adjusting the volume of airflow.

Precision-Adjust Air Flow Control Valves

A fine-adjustment dial allows tighter control of airflow and cylinder speed than other flow control valves. They control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting.

Tamper-Resistant Air Flow Control Valves

Prevent accidental airflow changes with these valves, which require an adjustment tool to alter their flow rate. They control the speed of air-powered equipment by adjusting the volume of airflow.

Elbow Corrosion-Resistant Air Flow Control Valves

Mount these valves directly to cylinder ports, eliminating additional tubing between the cylinder and valve for better control than inline valves. Made of plastic and stainless steel parts, they have excellent corrosion resistance. They control the speed of air-powered equipment by adjusting the volume of airflow.

Inline Corrosion-Resistant Air Flow Control Valves

Designed to be mounted inline, these valves can be placed in easy-to-reach locations. Made of plastic and stainless steel parts, they have excellent corrosion resistance. They control the speed of air-powered equipment by adjusting the volume of airflow.

High-Pressure Air Flow Control Valves

These valves handle pressure up to 265 psi. They control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting.

Dual-Control Two-Direction Air Flow Control Valves

Independently control the speed of airflow in two directions. These valves regulate the speed of airflow as it enters or exits equipment, and are often used to control the extension and retraction speed of an air cylinder at the same time.

Air-Operated Air Flow Control
Valves with Safety Shut-Off

Protect air-powered equipment in emergency shut-off situations—when system pressure drops, these valves automatically close to stop cylinder motion, even at mid-stroke. They control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting.

Slow-Start Air Flow Control Valves

Prevent damage to your equipment by limiting startup airflow and then gradually raising the airflow rate to operating levels.

Air-Exhaust Control Valves

Air-Exhaust Flow Control Valves

Install these valves in the exhaust ports of air directional control valves to control exhaust air speed without needing access to your cylinder.

Elbow Air-Exhaust Control Valves with Flow Control

Control the flow of exhaust air while also regulating the exhaust air speed. These valves dump exhaust air to the atmosphere without routing it back through a directional control valve. The 90° elbow shape allows you to install them in tight spaces. Also known as quick exhaust valves.

Ceiling Fan Speed Controls

Convert one or more single-speed ceiling fans to variable speed.

Speed-Monitoring Switches

Set to a specific speed to detect unwanted machinery slowdown that can cause damage and downtime.

Power Transmission

Precise-Control Linear Speed Limiters

Regulate the speed or feed rate of drill presses, milling machines, lathes, and similar devices.

Linear Speed Limiters

Put an end to lids and doors that slam shut or fly open—install these speed limiters for smooth, controlled motion.

Rotary Speed Limiters

Install these rotary speed limiters at the hinges of small lids, doors, and access panels for smooth, quiet motion.

Corrosion-Resistant Linear Speed Limiters

Smoothly open and close doors, lids, and access panels in damp and corrosive environments with these 316 stainless steel speed limiters.

Electromagnetic Tensioning, Holding,
and Stopping Shaft-to-Gear Couplings

Also known as electric hysteresis brakes, these couplings use magnetic force to create drag to slow or stop the motion of your drive system.

Electric Motors

Speed-Control Motors

Maintain speed automatically. These motors come with a speed control with a feedback sensor that adjusts power to maintain your set speed.

Stepper Motor Controllers and Drivers

Tell your stepper motor how far and fast to go by adding a controller and driver to your system.

Stepper Motors

These stepper motors are good for precise, repetitive movements, such as those made by the head of a 3D printer.

Stepper Motors with Integrated Motion Control

With a built-in controller and driver, these stepper motors come ready to program and operate.

Stepper Motors with Linear Actuation

Instead of a shaft, these stepper motors have a lead screw that converts rotational motion to linear motion.

Wet-Location Stepper Motors

To precisely position loads in automated systems that are frequently rinsed, these stepper motors are IP65 rated to seal out water.

Switches

Washdown Enclosed AC to DC Motor Speed Controls

Reversing Washdown EnclosedAC to DC Motor Speed Controls

Enclosed AC to DC Motor Speed Controls

Reversing Enclosed AC to DC Motor Speed Controls

AC to DC Motor Speed Controls

Programmable Three-Phase AC Motor Speed Controls

DIN-Rail Mount ProgrammableThree-Phase AC Motor Speed Controls

Washdown ProgrammableThree-Phase AC Motor Speed Controls

Three-Phase AC Motor Speed Controls

Low-Voltage DC Motor Speed Controls

Potentiometers

Digital Potentiometers

Harsh Environment Potentiometers

Variable-Speed Foot Switches

Air Flow Control Valves

Elbow Air Flow Control Valves

Inline Air Flow Control Valves

Flexible-Mount Air Flow Control Valves

Elbow Air Flow Control Valves with Flow Indicator

Precision-Adjust Air Flow Control Valves

Tamper-Resistant Air Flow Control Valves

Elbow Corrosion-Resistant Air Flow Control Valves

Inline Corrosion-Resistant Air Flow Control Valves

High-Pressure Air Flow Control Valves

Dual-Control Two-Direction Air Flow Control Valves

Air-Operated Air Flow ControlValves with Safety Shut-Off

Slow-Start Air Flow Control Valves

Air-Exhaust Control Valves

Air-Exhaust Flow Control Valves

Elbow Air-Exhaust Control Valves with Flow Control

Ceiling Fan Speed Controls

Ceiling Fan Speed Controls

Speed-Monitoring Switches

Speed-Monitoring Switches

Power Transmission

Precise-Control Linear Speed Limiters

Linear Speed Limiters

Rotary Speed Limiters

Corrosion-Resistant Linear Speed Limiters

Electromagnetic Tensioning, Holding,and Stopping Shaft-to-Gear Couplings

Electric Motors

Speed-Control Motors

Stepper Motor Controllers and Drivers

Stepper Motors

Stepper Motors with Integrated Motion Control

Stepper Motors with Linear Actuation

Wet-Location Stepper Motors

Reversing Washdown Enclosed
AC to DC Motor Speed Controls

DIN-Rail Mount Programmable
Three-Phase AC Motor Speed Controls

Washdown Programmable
Three-Phase AC Motor Speed Controls

Air-Operated Air Flow Control
Valves with Safety Shut-Off

Electromagnetic Tensioning, Holding,
and Stopping Shaft-to-Gear Couplings