I’m planning to create a new collection of boxes and want to add a negative rake scraper to help clean the inside of the boxes from gouge marks and refine the finish. Initially, I considered the D-Way negative rake scraper but decided instead to buy and modify a Robert Sorby square scraper to fit my needs.

Before I start shaping the scraper, I’m seeking advice on the most effective angles. There seems to be a wide range of preferences and suggestions, even among experienced turners. My understanding is that the choice of angle is less than 80° included angle, however D-Way uses angles like 20°/70° that is an exception to the rule maybe because the kind of steel and treatment.

Given that I work with different kind of woods like Peruvian walnut and purpleheart, I’m considering starting with a simple 25° angle on both sides, resulting in a 50° included angle. This would also allow me to flip the scraper and use the other side if needed.

I’d appreciate any insights or recommendations you have based on your experience.

Thank you!