FREQUENTLY ASKED QUESTIONS
ABOUT GRINDING STEEL PLATE
- Base plates – when setting equipment, a flat base plate will eliminate shimming and minimize labor cost.
- Machine table tops – when building an automated machine, it is important to start with a flat surface to mount critical close tolerance components.
- Stamping components – when building bolsters, die shows, parallels and other components, it is important your parts be flat or restrained in the flat condition to eliminate stack up errors.
- Machining set up – Sometimes your print does not call out flatness. It is still important to make you machining set up easier and will help hold machining tolerances.
Parallelism is the relationship a surface has to another surface or datum. As it relates to ground plate, a plate is parallel if its thickness is consistent all over the plate. Parallelism is normally checked using a micrometer or caliper.
Parallelism is different than flatness because it is the relationship between two surfaces, while flatness describes a single surface. Parallelism is critical when consistent thickness is required.
The symbol for parallelism is // and is usually follow with an allowed deviation and a datum surface callout.
- Plate Thickness and Material Type
- Surface Area and Stock Removal Requirements
- Thickness Tolerance
- Flatness Tolerance
- Parallel Requirements
- Quantity Requirements