July 18, 2024

Ariel Baena

Advanced Car Safety Systems

Detailed Instructions for Keyway Broaching

Keyway broaching refers to machining used to make keyways, which are grooves or slots within a hub or shaft that permit the exact positioning and secure fixing of key stocks or keys. Keyway broaching ensures precise, effective power transfer through different mechanical systems. In this article, we offer specific instructions on keyway broaching to assist you in understanding and implementing this process of machining effectively.

Preparing the Workpiece

Start by selecting the work you want to use, a shaft or hub constructed of materials like stainless steel, steel, or cast iron. Make sure the workpiece is placed in the broaching fixture or machine and securely clamped to stop moving in broaching.

Choosing the Keyway Broach

Choose the right keyway broach according to the dimensions of the keyway as well as the materials of your workpiece. Keyway broaches come in different sizes and styles, including square, round, rectangular, or square. Be sure that the broach meets the specifications of the keyway you desire and the machine’s capability.

Setting Up the Broaching Machine

Make sure the broaching device is configured correctly and set for keyway broaching. Follow the instructions of the manufacturer to set the stroke duration, the feed rates, and other parameters specific to the machine you are using. Ensure the device is in working condition and properly lubricated to ensure smooth operation.

Aligning the Broach

The broach should be aligned to the workpiece by putting it at the start position in the keyway. To ensure precise cutting, the broach must be centered and parallel to the workpiece. Specific broaching machines could come with aligners or fixtures to aid this process.

Broaching the Keyway

Connect the broach to the workpiece, and then start the broaching process. Use a steady, controlled force to pull or push the broach into the workpiece. The teeth of the broach can remove material, creating an opening as it moves. Make sure the broach moves effortlessly and without excessive friction or noise. Observe the broaching process to ensure the broach works correctly and avoids problems.

Coolant and Chip Removal

During broaching, use the appropriate cooling fluid or coolant to cool and lubricate the cutting edge. This reduces friction and heat, thus extending the broach’s lifespan and improving the finish of the surface. 

Make sure the coolant is applied constantly during the entire broaching procedure. Also, employ techniques for chip removal that include air blasts or chip brushes to clear debris and chips from the keyway and keep them from affecting the cutting process.

Finishing and Inspection

After completing the broaching process:

  • Check the keyway broach machine to ensure precision and quality.
  • Use precision measuring tools, like calipers or micrometers, to confirm how big the keyway is.
  • Examine any rough edges that require removal. You can make any other processing or finishing to get the desired finish on the surface or size.

Cleaning and Maintenance

Following the keyway broaching process, thoroughly clean the workpiece by removing any coolant particles or leftover chips. Ensure the broaching equipment is appropriately maintained by periodic cleaning, lubrication, and examination of the broaching tool. Place broaches in a secure area to avoid the possibility of damage and ensure they’re available for use.


Following these step-by-step instructions for keyway broaching, you will be able to make precise and precise keyways on your workpieces. Keyway broaching is an efficient and efficient method of creating keyways, which allows for solid electrical power transfer in machines.

Be sure to consider safety at all times during the process, such as wearing the appropriate personal protective equipment and following the instructions of the manufacturer for