Millwright Level 1 Practice Exam 2025 - Free Millwright Practice Questions and Study Guide

Question: 1 / 445

How is a Woodruff key sized?

By its length and width

By multiplying the first two numbers by 1/32" and the second set by 1/8"

The sizing of a Woodruff key is determined by a specific mathematical relationship involving both its dimensions and the corresponding diameter of the shaft into which it is fitted. The correct method for sizing a Woodruff key involves using a formula where the first two numbers of the key's size are multiplied by 1/32", and the second set of numbers is multiplied by 1/8". This formula correlates the key dimensions to the shaft size, ensuring that the key fits properly and functions effectively within the application's dimensional requirements.

This sizing system ensures that the Woodruff key provides adequate locking to the shaft, which is critical in preventing relative motion between the key and the component being driven. Each Woodruff key size is standardized, allowing for easier selection and application in machinery assembly, thus facilitating consistent and reliable operations.

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Based on the diameter of the shaft

Using a standard sizing chart

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