Best Engine Woodruff Keys of 2025

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 9, 2025

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Engine Woodruff Keys are small components that play a vital role in the functionality of engines. These keys are designed to fit into a keyway slot on the crankshaft and camshaft, ensuring that they rotate together in perfect synchronization. Made from high-quality materials, these keys are durable and long-lasting, providing a reliable solution for engine builders and mechanics. Engine Woodruff Keys are available in a variety of sizes and shapes to fit different engine models and specifications. They are a crucial part of any engine and are essential for ensuring optimal performance and longevity.

At a Glance: Our Top Picks

Swpeet 211Pcs Woodruff Key Kit Cover #TOP 1
Swpeet 211Pcs Woodruff Key Kit
ftb score rating icon 9.8
Performance Tool 80Pc Woodruff Key Assortment SAE Cover #TOP 2
Performance Tool 80Pc Woodruff Key Assortment SAE
ftb score rating icon 9.7
Univex 1200113 Woodruff Key Cover #TOP 3
Univex 1200113 Woodruff Key
ftb score rating icon 9.5

Top 10 Engine Woodruff Keys

#TOP 1

Swpeet 211Pcs Woodruff Key Kit

S3551
Swpeet 211Pcs Woodruff Key Kit Cover
Swpeet 211Pcs Metric Woodruff Key Assortment Kit with 15 Sizes Woodruff Semicircle Keys Half Moon Keys Keyway Shaft Crank Keys Parallel Drive Shaft Keys for Fasteners Mechanical Industry Crankshaft

The Swpeet Woodruff Key Kit comes with a comprehensive set of 211 pieces in various sizes, ensuring you have the right key for any task. The high-quality carbon steel construction offers durability and corrosion resistance, making these keys ideal for mechanical applications. You will appreciate the organized storage box, which keeps your keys neatly arranged and easily accessible. Additionally, the semicircular design of the half-moon keys reduces stress on the shaft, enhancing reliability during high-speed operations. This kit is a practical addition to any toolbox, providing convenience and efficiency for your projects.

What We Like
Comprehensive size variety
Durable carbon steel material
Organized storage box
Reduces shaft stress
Easy accessibility
#TOP 2

Performance Tool 80Pc Woodruff Key Assortment SAE

W5343
Grey
Performance Tool 80Pc Woodruff Key Assortment SAE Cover
Performance Tool W5343 80Pc Woodruff Key Assortment SAE, Grey

The Performance Tool 80Pc Woodruff Key Assortment SAE has 8 popular sizes of woodruff keys in a re-sealable plastic case, including sizes like 1/8 x 3/16 x 33/64 in and 1/8 x 1/4 x 41/64 in. This product is perfect for those who need a variety of sizes of woodruff keys in one package. Made in China.

What We Like
Convenient re-sealable plastic case
Includes 8 popular sizes of woodruff keys
Provides variety for different needs
#TOP 3

Univex 1200113 Woodruff Key

Univex
UNI1200113
Univex 1200113 Woodruff Key Cover
Univex 1200113 Woodruff Key #9 3/16X3/4 K

Univex Woodruff Key is a genuine OEM replacement part from Univex, a top U.S. manufacturer of kitchen equipment. Using authentic OEM parts ensures safety, reliability, and optimal performance for your equipment. Made in the United States, this Engine Woodruff Key is crucial for maintaining the functionality of your machinery. By choosing Univex Woodruff Key, you are investing in quality and durability, guaranteeing smooth operations and peace of mind.

What We Like
Genuine OEM part
Safety and reliability
Performance assurance
#TOP 4

HaSaoMoi 200pcs Metric Woodruff Key Assortment Kit

HaSaoMoi
HTZ7129
HaSaoMoi 200pcs Metric Woodruff Key Assortment Kit Cover
HaSaoMoi 200pcs Metric Woodruff Key Assortment Kit with 15 Most Popular Sizes - Woodruff semicircle Key - Half Moon Key - Keyway - Shaft Crank Key

Introducing the HaSaoMoi Woodruff Key Assortment Kit, a comprehensive set of 200 high-quality woodruff keys in 15 different sizes. Made from durable High Hard Carbon Steel, these precision-engineered keys are designed to fit snugly into their intended slots, ensuring a secure fit and reliable performance. With the included plastic storage case, organizing and accessing the keys is a breeze. Whether you're working on automotive engines, industrial machinery, machine tools, or agricultural equipment, this versatile kit is a must-have for any mechanic or DIY enthusiast. Offering exceptional value for the price, the HaSaoMoi Woodruff Key Assortment Kit is an essential addition to any tool collection.

What We Like
Comprehensive assortment
High-quality materials
Precision engineering
#TOP 5

Dorman Help! 13125 Woodruff Keys

13125
Natural
Dorman Help! 13125 Woodruff Keys Cover
Dorman Help! 13125 Woodruff Keys

Dorman Woodruff Keys, a product by Dorman, consists of woodruff keys for engines. It comes in a compact package measuring 5.03 inches in length, 0.1 inches in height, and 0.29 inches in width, weighing only 0.5 pounds. Made in the United States, this part number 13125 ensures quality and reliability. The woodruff keys play a crucial role in securing gears and pulleys on engine shafts, providing stability and preventing slippage. With its lightweight design and precise dimensions, Dorman Woodruff Keys offer easy installation and efficient engine performance for your convenience.

What We Like
Compact Packaging
Quality Material
Stability Assurance
#TOP 6

Juvielich 80pcs Woodruff Key Kit

Juvielich
FM20240415K-0001-FBA
Juvielich 80pcs Woodruff Key Kit Cover
Juvielich 80pcs Woodruff Key Assortment Kit, Metirc, Woodruff Semicircle Key, Carbon Steel, Black, Half Moon Key, Keyway Shaft Crank Keys Parallel Drive for Flywheel Key Pulley Fasteners

The Juvielich Woodruff Key Assortment is a comprehensive set featuring 80 pieces in eight different sizes, perfect for your varied project needs. Made from high-quality carbon steel, these keys are designed for durability, ensuring they won't easily break while providing a secure fit for your machinery. The included transparent storage box keeps everything organized, making it easy for you to find the right size quickly. With ten pieces of each size, you’ll have plenty for multiple projects, whether you're a professional or a DIY enthusiast. It’s a versatile solution for automotive engines, industrial machinery, and more.

What We Like
Wide variety of sizes
Durable carbon steel material
Organized storage case
Ample quantity for projects
#TOP 7

Ofiswadi 120pcs Woodruff Key Kit

Ofiswadi
banyuejian120
Ofiswadi 120pcs Woodruff Key Kit Cover
Ofiswadi 120pcs Woodruff Key Assortment Kit, 10 Popular Sizes of Half Moon Keys, Keyway and Key Stock Set, Semicircle Shaft Crank Keys for Flywheel Applications

The Ofiswadi Woodruff Key Set includes 120 high-quality keys made from premium carbon steel, ensuring they resist corrosion and rust for long-lasting use. With 10 different sizes, you can easily find the right fit for your project, minimizing frustration and downtime. Each key is precision-engineered, which means they will securely hold machine components in place, preventing unwanted movement. Plus, the organized storage box keeps everything neatly arranged, making it simple for you to grab the exact size you need without any hassle.

What We Like
High-quality carbon steel
Variety of sizes available
Precision fit for reliability
Convenient storage box
#TOP 8

boeray Woodruff Key Assortment Metric Set

TZ7045
Silver
boeray Woodruff Key Assortment Metric Set Cover
boeray 164pcs Woodruff Key Assortment Metric Set 17 Sizes Carbon Steel Woodruff-key Kit Woodruff Key-Crankshaft

Introducing the boeray Woodruff Key Set, a must-have for any DIY enthusiast or professional mechanic. This set includes 164 pieces of high-quality carbon steel woodruff keys in 17 different sizes, ensuring you have the perfect key for any project. The precision machining of these keys guarantees a secure fit, making them ideal for pulleys and drive shaft applications. With the keys conveniently stored in a sturdy plastic case, you'll never have to worry about losing or misplacing them. Installing these woodruff keys is a breeze, thanks to their easy operation and high accuracy. Say goodbye to trips to the hardware store and enjoy the convenience of having all the woodruff keys you need at your fingertips.

What We Like
Durable carbon steel
17 sizes, 164 pieces
Precision machining for secure fit
#TOP 9

Glarks 211Pcs Woodruff Key Assortment Kit

G-3268
Silver
Glarks 211Pcs Woodruff Key Assortment Kit Cover
Glarks 211Pcs Woodruff Key with Round Ended Feather Key Assortment Kit, 7 Sizes Half Moon Keys and 8 Sizes Stainless Steel Key Stock Keystock for Fasteners Mechanical Industry

Glarks Woodruff Key Kit includes 150 round-ended feather keys and 61 Woodruff Keys in various sizes. The durable carbon steel material ensures rust-proof and wear resistance for long-term use. With exquisite workmanship, these keys are burr-free and smooth to touch. The kit offers 15 different sizes to meet various needs, stored in a convenient and sturdy box. Ideal for fastening equipment, improving efficiency, and transferring torque between shafts and hubs or bushings.

What We Like
15 Different Sizes
Durable Carbon Steel
Convenient Storage Box
#TOP 10

Keadic 140Pcs Carbon Steel Key Set

K1014
Clear
One Size
Keadic 140Pcs Carbon Steel Key Set Cover
Keadic 140Pcs Carbon Steel Round Ended Parallel Drive Shaft Key Assortment Set, 8mm 10mm 12mm 16mm 20mm 25mm 30mm Professional Parallel Key Stock Pulley Feather Key for Fastening Connection

The Keadic Key Assortment includes 140 pieces in 16 different sizes, making it perfect for various mechanical needs. Each key is organized in a labeled plastic box for easy access and storage. Made from high-quality carbon steel, these keys resist corrosion and rust, ensuring durability over time. The rounded corner design allows for quick installation, helping you efficiently fix wheels or pulleys to main shafts. This set is ideal for a range of applications, from machine tools to garden equipment, offering versatility and convenience for your projects.

What We Like
16 size options
Durable carbon steel
Easy storage and access
Quick installation
Versatile applications
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What does a woodruff key do in an engine?

A woodruff key is a semi-circular disc used to connect machine parts to rotating shafts in an engine. It prevents gears or other machine parts from moving independently from the shaft. These keys are installed into recessed key seats cut into the shafts, ensuring a secure connection.

2. What are the disadvantages of a woodruff key?

Woodruff keys can become worn over time due to constant use. They may decrease the strength of the shaft due to the depth of keyways. Additionally, removing woodruff keys requires special tools, which can add to the cost.

3. What is a woodruff key in a crankshaft?

In a crankshaft, a woodruff key is a half-moon slot cut into the shaft using a woodruff cutter tool. The curved section of the key is pressed into the keyseat of the crankshaft, while the flat side interfaces with the slot in the hub, gear, or bushing.

4. Is a woodruff key necessary?

Yes, a woodruff key is necessary in an engine. It not only holds components in place on a shaft but also acts as a fail-safe mechanism. In the event of excessive loads, the key shears, protecting expensive parts. The key's crescent profile allows it to sit deeper in the shaft, reducing the likelihood of it rolling out of the groove.

5. What are the advantages of a Woodruff key?

Woodruff keys offer several advantages in engine applications. They are ideal for high-speed rotating assemblies and reduce stress concentrations at the shaft end by eliminating milling near shaft shoulders. The deeper seat in the shaft reduces the risk of the key rolling out of the key seat, providing a more precise fit and reducing play.

Editor's Notes

During our engine woodruff key research, we found 24 engine woodruff key products and shortlisted 10 quality products. We collected and analyzed 5,448 customer reviews through our big data system to write the engine woodruff keys list. We found that most customers choose engine woodruff keys with an average price of $11.38.

The engine woodruff keys are available for purchase. We have researched hundreds of brands and picked the top brands of engine woodruff keys, including Swpeet, Performance Tool, Univex, HaSaoMoi, Dorman. The seller of top 1 product has received honest feedback from 1,558 consumers with an average rating of 4.8.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.