Machine Screw Actuators | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Type Thread Type

Metric Rounded
Trapezoidal

Metric Ball

Diamond

	Component Component

	Lead Screw
	Nut
	Ball Screw
	Ball Nut
	Collar
	Hex Head Screw
	Handle
	End Support
	Flange
	Ball Screw with One Machined End

	Material Material

	Thread Direction Thread Direction

	Right Hand
	Left Hand
	Right Hand and Left Hand

	Length Length

	Nut Type Nut Type


Round	Flange

Hex	Externally Threaded

Coupling	Square

Platform	Threadless

Thumb

	Travel Distance per Turn Travel Distance per Turn

	Number of Thread Starts Number of Thread Starts

	Threading Threading


Fully Threaded	Partially Threaded

	Hardness Hardness

	Tensile Strength Tensile Strength

100,000 psi or greater

Not Rated

	Speed Ratio Speed Ratio

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Thread Fit Thread Fit

Class 2C

Class 2G

	Travel Length Travel Length

	Screw Jack Orientation Screw Jack Orientation


Upright	Inverted

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

REACH Compliant

	Diameter Diameter

	Capacity Capacity

	Thread Pitch Thread Pitch

2,106 Products

Selecting Compatible Lead Screws and Nuts

Acme Screw Jacks

Broad, strong Acme threads make these screw jacks better than ball screw jacks for heavy loads, intermittent positioning applications, and where vibration is present.

Acme Screw Jacks with Mounting Plate

The mounting plate provides a flat surface for supporting loads.

Mounting Plates for Acme Screw Jacks

Add a flat mounting surface to to a screw jack to support loads.

Eyelet End Fittings for Acme Screw Jacks

Attach these fittings to the end of a screw jack to create pivoting connections with clevis rod ends and other linkages.

Ball Screw Jacks

Low-friction ball bearings allow these screw jacks to use half the power required by an Acme screw jack to lift the same load. Typically used as actuators, they run at higher speeds than Acme screw jacks.

Mounting Plates for Ball Screw Jacks

Add a flat mounting surface to a ball screw jack to support loads.

Eyelet End Fittings for Ball Screw Jacks

Attach these fittings to the end of a ball screw jack to create pivoting connections with clevis rod ends and other linkages.

Fast-Travel Ball Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start.

Self-Stopping Ball Screws and Nuts

Keep your ball screw spinning without the ball nut damaging your system. When the ball nut reaches the stop pin at either end of the ball screw, it disengages and begins to idle.

Metric Ball Screws and Nuts

Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start metric ball screws and nuts, these have a single thread that runs the length of the screw.

Ball Screws and Nuts

Also known as single-start ball screws and nuts, these have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts.

Fast-Travel Corrosion-Resistant Ball Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start.

Corrosion-Resistant Ball Screws and Nuts

Also known as single-start ball screws and nuts, these have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts.

Acme Lead Screws and Nuts

Found in hand-powered clamps, vises, grates, doors, and work tables, lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects.

Metric Lead Screws and Nuts

These metric lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects. They're commonly found in hand-powered clamps, vises, grates, doors, and work tables.

Ultra-Precision Lead Screws and Nuts

Also known as single-start and self-locking lead screws and nuts, these have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won't unexpectedly move when the lead screw is at rest.

Self-Reversing Lead Screws and Nuts

A crisscross thread pattern allows you to drive the nut back and forth without changing the lead screw's direction of rotation. When the nut reaches one end of the lead screw, it changes direction and travels back to the other end.

Metric Clamping Lead Screw Collars

Install these threaded collars on a metric lead screw to separate and position components, or use them as an end stop to limit travel.

Two-Piece Clamping Acme Lead Screw Collars

Mount these two-piece collars anywhere on an Acme lead screw without removing components.

Metric Fast-Travel Ultra-Precision
Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start.

Clamping Acme Lead Screw Collars

Thread these one-piece collars onto an Acme lead screw.

Metric Ultra-Precision Lead Screws and Nuts

Metric End Supports for Lead Screws and Ball Screws

A set of ball bearings reduces friction and secures the end of a metric ball or lead screw.

End Supports for Lead Screws and Ball Screws

A set of ball bearings reduces friction and secures the end of a ball or lead screw.

Threadless Lead Screw Nuts

Install these nuts on a rotary shaft to create a linear positioning system without a lead screw. Instead of threads, a set of angled ball bearings drives the nut along a shaft as it spins.

Fast-Travel Precision Acme Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start.

Metric Precision Lead Screws and Nuts

Also known as trapezoidal-thread lead screws and nuts.

Precision Acme Lead Screws and Nuts

Flanges for Precision Acme Nuts

Combine with an externally threaded acme nut to create a custom flange nut.

Fast-Travel Ultra-Precision Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start.

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Selecting Compatible Lead Screws and Nuts