Surface Finish Comparison

Surface Finish Comparison

There are several different surface finish scales commonly being used. Typically, µmRmax (Ry), µmRa, µinRa, are the scales in use. Following is a helpful Surface Finish Comparison Chart that provides values for several different finish scales.
Back to Basics (5/6): EDM Drilling Machine Basics

Back to Basics (5/6): EDM Drilling Machine Basics

As highlighted in the first lesson, there are three main types of EDM machines: Wire EDM, Sinker EDM, and EDM Drilling.  In this segment, we’ll focus our attention on EDM Drilling. EDM Drilling Machine Basics EDM Drilling machines, which are commonly referred to...
Back to Basics (4/6): Sinker EDM Machine Basics

Back to Basics (4/6): Sinker EDM Machine Basics

Sinker EDM, also referred to as Ram EDM, uses electrodes machined from graphite or copper to shape the workpiece. Typically found in die/mold component manufacturing, a Sinker EDM raises and lowers (sinks) the electrode along the workpiece. Regardless of the name you...
Back to Basics (3/6): Wire EDM Machine Basics

Back to Basics (3/6): Wire EDM Machine Basics

Wire EDM machines use a small, traveling wire electrode to machine complex shapes, which are always through cavities (the wire must pass completely through the workpiece).  Machines are capable of cutting and re-threading the wire automatically, which greatly...