80pcs Carbon Steel Woodruff Half Moon Key Assortment Set

80-Piece Carbon Steel Woodruff Key Assortment Set

Keep your mechanical assemblies tight and precisely aligned with this comprehensive 80-piece carbon steel Woodruff (half-moon) key assortment. Whether you're working on crankshafts, gear shafts, pulleys, or general mechanical fastening projects, this multi-size set has you covered with the right key for every job.

Made in Mainland China.

Why Choose This Key Set?

• Durable Carbon Steel Construction: Each key is crafted from high-grade carbon steel, delivering reliable strength and long-lasting performance across a wide range of mechanical applications.
• 80-Piece Combination Set: Includes 80 half-round (semi-circular) keys in multiple metric sizes, giving you the versatility to tackle different fastening needs in one convenient kit.
• Precision-Machined Dimensions: Accurately measured to ensure a secure, snug fit in keyways — minimising play and maximising torque transfer between shaft and hub.
• Organised Storage Box: All keys are stored in a sturdy PP plastic compartment box, making it easy to identify and access the size you need without rummaging through loose hardware.
• Wide Compatibility: Designed for high universality fitment across crankshafts, motor shafts, gear shafts, and other keyed mechanical assemblies in automotive, woodworking, and industrial settings.

Specifications

• Product Name: Semi-Circular / Woodruff (Half-Moon) Key Set
• Material: Carbon Steel (keys) + PP Plastic (storage box)
• Color: Silver
• Quantity: 80 pieces
• Sizing: Multiple metric sizes included
• Universal Fitment: Yes
• Country of Origin: Mainland China

Package Contents

• 80 × Carbon Steel Half-Moon Keys (assorted metric sizes)
• 1 × PP Plastic Storage Box with compartments

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For general guidance on fastener safety standards and mechanical hardware, visit the NIST Manufacturing Standards resource.

Note: Actual colour may vary slightly from product images due to monitor brightness and lighting conditions. Please allow for minor measurement tolerances on stated dimensions.

Frequently Asked Questions

Q: What is a Woodruff (half-moon) key and what is it used for?

A: A Woodruff key, also called a half-moon or semi-circular key, is a fastening component inserted into a matching keyway on a shaft and hub. It prevents rotational slipping between the shaft and an attached component such as a gear, pulley, or sprocket, ensuring secure torque transfer in mechanical assemblies including crankshafts and motor shafts.

Q: Are these keys metric or imperial sized?

A: This assortment features metric-sized half-moon keys, making it well-suited for a wide range of metric-standard machinery, automotive, and general mechanical applications.

Q: How are the keys stored and organised?

A: The 80 keys come pre-sorted in a durable PP plastic compartment box, keeping each size separate for quick identification and easy access during projects.

Q: What material are the keys made from, and how durable are they?

A: The keys are manufactured from carbon steel, which provides excellent strength and durability for reliable use in both light-duty and demanding mechanical applications over an extended service life.