17 Gears | McMaster-Carr

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	OD OD

0.28"

0.29"

	Gear Type Gear Type

	Material Material

	Bore Type Bore Type

	Face Width Face Width

	Pressure Angle Pressure Angle

14 1/2°

20°

	Gear Pitch Gear Pitch

6
8
10
12
16
18
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24
32
48
64

	Module Module

	Gear Pitch Diameter Gear Pitch Diameter

	Overall Width Overall Width

	Overall Length Overall Length

	Hub Diameter Hub Diameter

	Hub Width Hub Width

	Speed Ratio Speed Ratio

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

DFARS Specialty Metals
COTS-Exempt

	Teeth Heat Treatment Teeth Heat Treatment

Not Hardened

Hardened

	Gear Rack Shape Gear Rack Shape


Rectangular	Round

	For Shaft Angle For Shaft Angle


45°	60°

90°	120°

	Height Height

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About Roller Chain and Sprockets

Metal Gears and Gear Racks—20° Pressure Angle

The current industry standard, these 20° pressure angle gears have thicker, stronger teeth than 14½° pressure angle gears. They're also known as spur gears.

Metal Gears and Gear Racks—14 1/2° Pressure Angle

A former industry standard, 14½° pressure angle gears are often found on older machinery.

High-Power Metal Gears

For smooth, quiet operation at high speeds under heavy loads, helical gears have curved teeth that engage gradually and stay in contact longer than straight teeth.

Metal Worms and Worm Gears

Worm gears use screw threads to reduce shaft speed by ratios of 10:1 and greater while transmitting motion at a right angle.

Metal Miter Gears

With straight, conically shaped teeth and a 1:1 speed ratio, miter gears connect two shafts at a right angle without changing shaft speed or torque. They're more efficient than spiral miter gears because they create less friction.

Metal Bevel Gears

A type of miter gear where one gear is smaller than the other, bevel gears provide right-angle speed reduction at ratios ranging from 2:1 to 5:1. They’re more efficient than worm gears because they create less friction.

High-Power Metal Miter Gears

Also known as spiral miter gears, these gears have curved teeth that gradually engage and stay in contact longer than straight teeth so they handle heavier loads at higher speeds. Speed ratio is 1:1.

High-Power Metal Bevel Gears

Made from carbon steel with spiral teeth, these gears handle heavier loads at higher speeds than bevel gears with straight teeth because their teeth stay in contact longer.

Plastic Gears and Gear Racks—20° Pressure Angle

The current industry standard, gears with a 20° pressure angle have thicker, stronger teeth than gears with a 14½° pressure angle.

Plastic Gears and Gear Racks—14 1/2° Pressure Angle

A former industry standard, 14½° pressure angle gears are often found on older machinery.

Plastic Worm Gears

These plastic gears are lighter and quieter than metal gears—pair them with metal worms for lubrication-free operation. Worm gears use screw threads to make large reductions to shaft speed while transmitting motion at a right angle.

Plastic Miter Gears

Connect two shafts at a right angle without changing shaft speed or torque.

Plastic Bevel Gears

Reduce speeds where noise, corrosion, and frequent lubrication are a concern. Compared to metal gears, these nylon gears run more quietly, won't rust, and don't need to be lubricated.

Gear Rod Stock

Machine your own gears to fit the exact face width and shaft diameter required.

Metal Ratcheting Gears

Compared to plastic gears, metal gears are better for high-load, high-speed, and heavy duty applications.

Plastic Ratcheting Gears

A light duty alternative to metal, plastic gears have good corrosion and chemical resistance.

Gear Tooth Pitch Identifiers

When replacing a gear, use these gauges to identify pressure angle, pitch, and module.

Sprockets

Sprockets for ANSI Roller Chain

Mount these sprockets onto your shaft and secure with a set screw—no machining necessary.

Machinable-Bore Sprockets for ANSI Roller Chain

For a custom fit on your shaft, these sprockets can be machined to your exact specifications.

Wear-Resistant Sprockets for ANSI Roller Chain

Hardened teeth give these steel sprockets increased wear resistance for a long service life.

Corrosion-Resistant Sprockets for ANSI Roller Chain

Mount these sprockets onto your shaft and secure with a set screw—no machining necessary.

Machinable-Bore Corrosion-Resistant
Sprockets for ANSI Roller Chain

For a custom fit on your shaft, these sprockets can be machined to your exact specifications.

Lightweight Sprockets for ANSI Roller Chain

Made of nylon, these sprockets are lightweight, quiet, and corrosion resistant.

Flat Sprockets for ANSI Roller Chain

Also known as A-plate sprockets, these have a slim profile that fits in narrow spaces.

Sprockets for Double-Strand ANSI Roller Chain

These sprockets have two rows of teeth for use with double-strand ANSI roller chain.

Flat Sprockets for Metric Roller Chain

With metric teeth and slim profile, these sprockets allow your ISO roller chain to reach narrow spaces. They're commonly referred to as A-plate sprockets.

Sprockets for Metric Roller Chain

Designed to meet ISO 606 and DIN 8187 international dimensional standards, these sprockets are for use with compatible ISO and DIN roller chain.

Machinable-Bore Corrosion-Resistant
Sprockets for Metric Roller Chain

Machine the center of these sprockets to fit the exact dimensions of your shaft. The teeth are sized to fit into metric ISO roller chain.

Sprockets for Double-Strand Metric Roller Chain

The double row of teeth on these sprockets are designed to fit into metric ISO double-strand roller chain.

Sprockets for Miniature Roller Chain

Often used in electronic equipment, instrumentation devices, printers, and other compact machinery, these sprockets are made for use with our miniature roller chain.

Idler Sprockets

Idler Sprockets for ANSI Roller Chain

These sprockets are made of steel.

Wear-Resistant Idler Sprockets for ANSI Roller Chain

Hardened teeth give these steel sprockets increased wear resistance for a long service life.

Lightweight Idler Sprockets for ANSI Roller Chain

Made of nylon, these sprockets are lightweight, quiet, and corrosion resistant.

Wear-Resistant Wide-Hub Idler
Sprockets for ANSI Roller Chain

Hardened teeth give these steel sprockets increased wear resistance for a long service life.

Wide-Hub Idler Sprockets for ANSI Roller Chain

A wide hub provides these sprockets with stability under heavy loads.

Idler Sprockets for Metric Roller Chain

Keep constant tension on your drive with these sprockets that press against your metric ISO roller chain to take up slack and reduce wear and vibration.

Idler Sprockets for Double-Strand ANSI Roller Chain

These idler sprockets have two rows of teeth for use with double-strand ANSI roller chain.

Bushing-Bore Sprockets

Taper-Lock Bushing-Bore
Sprockets for ANSI Roller Chain

Get the same sizing versatility as quick-disconnect sprockets while using less space.

Quick-Disconnect (QD) Bushing-Bore
Sprockets for ANSI Roller Chain

Use these sprockets with compatible QD bushings.

Split-Tapered Bushing-Bore
Sprockets for ANSI Roller Chain

Since these sprockets grip bushings more tightly than taper-lock sprockets, they’re often used in high-torque applications.

Taper-Lock Bushing-Bore
Sprockets for Metric Roller Chain

While their teeth fit into metric ISO roller chain, these sprockets use taper-lock bushings to grip shafts.

Flat Taper-Lock Bushing-Bore Sprockets
for Double-Strand Metric Roller Chain

With a slim profile and a double row of teeth, these sprockets allow your metric ISO double-strand roller chain to fit into tight spaces. They’re often called A-plate sprockets.

Timing Belts and Pulleys

XL Series Corrosion-Resistant Timing Belt Pulleys

Pulleys are anodized aluminum, which is more corrosion resistant than steel.

XL Series Lightweight Timing Belt Pulleys

Acetal and aluminum construction makes these pulleys useful in for weight-sensitive applications.

XL Series Timing Belt Pulleys

Pulleys are XL series (extra light) and have trapezoidal teeth.

L Series Corrosion-Resistant Timing Belt Pulleys

Pulleys are anodized aluminum, which is more corrosion resistant than steel.

L Series Timing Belt Pulleys

These L series (light) pulleys and have trapezoidal teeth.

L Series Quick-Disconnect Timing Belt Pulleys

Carry heavy loads without slippage—pulleys mount with a bushing for a more secure grip on the shaft than set screws.

MXL Series Corrosion-Resistant Timing Belt Pulleys

Anodized aluminum has good corrosion resistance.

MXL Series Lightweight Timing Belt Pulleys

Made from polycarbonate, these pulleys are useful in applications with weight constraints.

H Series Timing Belt Pulleys

Pulleys are H series (heavy) and have trapezoidal teeth.

H Series Quick-Disconnect Timing Belt Pulleys

Move heavy loads without slippage—pulleys mount with a bushing for a more secure grip on the shaft than set screws.

AT Series Timing Belt Pulleys

Made of aluminum, these pulleys have good corrosion resistance.

T Series Timing Belt Pulleys

Made of aluminum, these pulleys have good corrosion resistance.

Timing Belt Idler Pulleys

Add these free-spinning pulleys to your timing belt setup to minimize vibration and keep belts from wearing out.

High-Strength Timing Belts and Pulleys

High-Strength Corrosion-Resistant
HTD Timing Belt Pulleys

Move belts forward and backward or stop and start them in precise positions, especially in areas where rust is a concern.

High-Strength HTD Timing Belt Pulleys

These HTD (high torque drive) pulleys have a curved tooth shape that provides higher strength than trapezoidal teeth.

High-Strength HTD Timing Belt Idler Pulleys

Keep high torque drive (HTD) timing belt systems running tightly with these idler pulleys. Made with built-in, free-spinning ball bearings, they're installed on shafts or belt tensioners to remove slack from timing belts.

High-Strength GT Timing Belt Pulleys

For higher speed or higher torque applications, these GT series timing belt pulleys provide a more precise fit than HTD pulleys. Use them where accuracy is critical, such as in storage and retrieval systems or in robotics.

High-Strength Ultra-Quiet Timing Belt Pulleys

Teeth are curved and set in an offset pattern for high strength with 25% less operating noise than pulleys and belts with trapezoidal teeth.

Ultra-High-Strength Poly Chain Timing Belt Pulleys

Curved teeth with a high pitch provide superior load distribution and reduce wear. They mount with a bushing for a more secure grip on the shaft than set screws.

Gear Boxes and Speed Reducers

Right-Angle Speed Reducers

Adjust shaft speed and torque for use in low-speed, high-torque applications.

Flexible-Mount Right-Angle Speed
Reducers for Face-Mount AC Motors

With output shaft openings on both sides, these speed reducers adapt to fit multiple configurations. Mount to a NEMA 56C motor.

Plug-In Shafts for Flexible-Mount
Right-Angle Speed Reducers

Convert output drives from female to male.

Low-Profile Right-Angle Speed Reducers

The input and output shafts are positioned at the same height, so these speed reducers take up less than half the vertical space as our standard right-angle speed reducers.

Right-Angle Speed Reducers
for Face-Mount AC Motors

Mount these speed reducers to a NEMA 56C motor.

Sanitary Right-Angle Speed Reducers

Cut shaft speed and increase torque while transmitting motion at a 90° angle in food, pharmaceutical, and other sanitary environments.

Base Mounting Plates for Right-Angle Speed Reducers

Mount right-angle speed reducers to machinery or other surfaces where access from the bottom is not possible.

Sanitary Right-Angle Speed
Reducers for Face-Mount AC Motors

With a sanitary design for food-processing environments, these speed reducers mount to the face of your motor—no coupler required—to slow shafts and increase torque while transmitting motion at a 90° angle.

Right-Angle Gear Boxes

With shaft diameters of 3/8" and larger, these gear boxes transmit higher speeds and greater torque than Compact Right-Angle Gear Boxes.

Compact Right-Angle Gear Boxes

For small machinery and tight spots, these gear boxes have 1/4" diameter and smaller shafts and a footprint of less than 2½" square.

Metric Right-Angle Gear Boxes

Shaft diameters range from 5 to 35 mm.

Gear Boxes for Linear Motion

Create linear motion in a single direction.

Gear Boxes for Mirrored Linear Motion

A set of gear racks creates linear motion in opposite directions at the same time.

Speed Reducers for Position-
and Speed-Control Motors

Pair these speed reducers with NEMA stepper and servo motors. Helical gears provide exact positioning and smoother travel than our other speed reducers.

Speed Reducers for Face-Mount AC Motors

Mount these gears to a NEMA motor. Spur gears minimize torque loss between your motor and drive shaft, making these speed reducers more efficient than our other speed reducers.

About Roller Chain and Sprockets

Gears and Gear Racks

Metal Gears and Gear Racks—20° Pressure Angle

Metal Gears and Gear Racks—14 1/2° Pressure Angle

High-Power Metal Gears

Metal Worms and Worm Gears

Metal Miter Gears

Metal Bevel Gears

High-Power Metal Miter Gears

High-Power Metal Bevel Gears

Plastic Gears and Gear Racks—20° Pressure Angle

Plastic Gears and Gear Racks—14 1/2° Pressure Angle

Plastic Worm Gears

Plastic Miter Gears

Plastic Bevel Gears

Gear Rod Stock

Metal Ratcheting Gears

Plastic Ratcheting Gears

Gear Tooth Pitch Identifiers

Sprockets

Sprockets for ANSI Roller Chain

Machinable-Bore Sprockets for ANSI Roller Chain

Wear-Resistant Sprockets for ANSI Roller Chain

Corrosion-Resistant Sprockets for ANSI Roller Chain

Machinable-Bore Corrosion-ResistantSprockets for ANSI Roller Chain

Lightweight Sprockets for ANSI Roller Chain

Flat Sprockets for ANSI Roller Chain

Sprockets for Double-Strand ANSI Roller Chain

Flat Sprockets for Metric Roller Chain

Sprockets for Metric Roller Chain

Machinable-Bore Corrosion-ResistantSprockets for Metric Roller Chain

Sprockets for Double-Strand Metric Roller Chain

Sprockets for Miniature Roller Chain

Idler Sprockets

Idler Sprockets for ANSI Roller Chain

Wear-Resistant Idler Sprockets for ANSI Roller Chain

Lightweight Idler Sprockets for ANSI Roller Chain

Wear-Resistant Wide-Hub IdlerSprockets for ANSI Roller Chain

Wide-Hub Idler Sprockets for ANSI Roller Chain

Idler Sprockets for Metric Roller Chain

Idler Sprockets for Double-Strand ANSI Roller Chain

Bushing-Bore Sprockets

Taper-Lock Bushing-BoreSprockets for ANSI Roller Chain

Quick-Disconnect (QD) Bushing-BoreSprockets for ANSI Roller Chain

Split-Tapered Bushing-BoreSprockets for ANSI Roller Chain

Taper-Lock Bushing-BoreSprockets for Metric Roller Chain

Flat Taper-Lock Bushing-Bore Sprocketsfor Double-Strand Metric Roller Chain

Timing Belts and Pulleys

XL Series Corrosion-Resistant Timing Belt Pulleys

XL Series Lightweight Timing Belt Pulleys

XL Series Timing Belt Pulleys

L Series Corrosion-Resistant Timing Belt Pulleys

L Series Timing Belt Pulleys

L Series Quick-Disconnect Timing Belt Pulleys

MXL Series Corrosion-Resistant Timing Belt Pulleys

MXL Series Lightweight Timing Belt Pulleys

H Series Timing Belt Pulleys

H Series Quick-Disconnect Timing Belt Pulleys

AT Series Timing Belt Pulleys

T Series Timing Belt Pulleys

Timing Belt Idler Pulleys

High-Strength Timing Belts and Pulleys

High-Strength Corrosion-ResistantHTD Timing Belt Pulleys

High-Strength HTD Timing Belt Pulleys

High-Strength HTD Timing Belt Idler Pulleys

High-Strength GT Timing Belt Pulleys

High-Strength Ultra-Quiet Timing Belt Pulleys

Ultra-High-Strength Poly Chain Timing Belt Pulleys

Gear Boxes and Speed Reducers

Right-Angle Speed Reducers

Flexible-Mount Right-Angle SpeedReducers for Face-Mount AC Motors

Plug-In Shafts for Flexible-MountRight-Angle Speed Reducers

Low-Profile Right-Angle Speed Reducers

Right-Angle Speed Reducersfor Face-Mount AC Motors

Sanitary Right-Angle Speed Reducers

Base Mounting Plates for Right-Angle Speed Reducers

Sanitary Right-Angle SpeedReducers for Face-Mount AC Motors

Right-Angle Gear Boxes

Compact Right-Angle Gear Boxes

Metric Right-Angle Gear Boxes

Machinable-Bore Corrosion-Resistant
Sprockets for ANSI Roller Chain

Machinable-Bore Corrosion-Resistant
Sprockets for Metric Roller Chain

Wear-Resistant Wide-Hub Idler
Sprockets for ANSI Roller Chain

Taper-Lock Bushing-Bore
Sprockets for ANSI Roller Chain

Quick-Disconnect (QD) Bushing-Bore
Sprockets for ANSI Roller Chain

Split-Tapered Bushing-Bore
Sprockets for ANSI Roller Chain

Taper-Lock Bushing-Bore
Sprockets for Metric Roller Chain

Flat Taper-Lock Bushing-Bore Sprockets
for Double-Strand Metric Roller Chain

High-Strength Corrosion-Resistant
HTD Timing Belt Pulleys

Flexible-Mount Right-Angle Speed
Reducers for Face-Mount AC Motors

Plug-In Shafts for Flexible-Mount
Right-Angle Speed Reducers

Right-Angle Speed Reducers
for Face-Mount AC Motors

Sanitary Right-Angle Speed
Reducers for Face-Mount AC Motors

Speed Reducers for Position-
and Speed-Control Motors