Blanchard Grinding

What Does Blanchard Grinding Mean?

Blanchard grinding refers to a surface preparation technique used to efficiently remove stock from one side of a metallic object with a large surface area. It is often the first step in corrosion prevention treatment that is done on metallic surfaces prior to adding a coating, film or paint.

Blanchard grinding is also known as rotary surface grinding.

Corrosionpedia Explains Blanchard Grinding

Blanchard grinding is used on ferrous objects that have a large surface area. Magnets or other holding devices are used to ensure stability during the grinding process.

Blanchard grinding is commonly used on the following large objects:

• Castings and forgings
• Sections of plate stock
• Stampings
• Molds and dies

The following are the average general tolerances for Blanchard ground steel plates:

• Dimensions: ±0.002 inch
• Parallelism: 0.0015 inch
• Flatness: 0.0015 inch per foot
• Surface finish: 125 rms