Bon Tool Stainless Steel Hand Concrete Groover - ComfortWave (82-229)

The primary purpose of the Bon Tool Stainless Steel Hand Concrete Groover is to create clean, uniform expansion joints in fresh concrete slabs. These joints help control cracking.

The ComfortWave handle is ergonomically designed to reduce user fatigue during extended periods of use, providing a more comfortable grip.

The ideal depth for expansion joints typically ranges from one-quarter to one-third of the slab's thickness, depending on local building codes and project specifications. This tool's design helps maintain consistent depth.

The best time is after screeding and bull floating, when the concrete has reached the 'thumbprint' stage – firm enough to hold a thumbprint indentation but still pliable enough to groove.

While it creates precise lines, this tool is specifically designed for functional expansion joints rather than decorative patterns. For decorative work, specialized tools might be more appropriate.

Clean it thoroughly with water after each use, dry it completely, and store it in a dry place to prevent corrosion and maintain performance.

This patent number likely refers to the unique design of the tool, particularly the yoke bracket or its overall ergonomic features, as mentioned in its description.

Ensure the concrete is at the correct stage of set. Maintain a steady, even pressure and angle throughout the grooving process. Check that the yoke bracket is not obstructed.

Verify the concrete is not too wet or too dry. Adjust your grip on the ComfortWave handle for better leverage. Ensure the blade is clean and free of dried concrete.

Take regular breaks to rest your hands. Ensure you are using a firm but relaxed grip. The ergonomic design is intended to reduce fatigue, but breaks are still recommended for very long periods of operation.