Our own Jim Terry was featured in a recent edition of Crain’s Detroit Business. The April 8, 2018 article explains that Jim – PF Markey Owner and CEO – didn’t set out to build an international company that sells vending machines and tools to businesses. After graduating from Saginaw Valley State University in 1986, Jim joined the 3-person team at …
Deburring is the process of eliminating burrs from parts by using methods such as tumbling, sanding, grinding, etc. Deburring acts as a type of finishing as it smoothes edges and helps in machining parts.
Runout describes the inaccuracy of rotating mechanical systems, specifically that the tool or shaft does not rotate exactly in line with the main axis. For example; When drilling, runout will result in a larger hole than the drill’s nominal diameter due to the drill being rotated off axis instead of in line.
A chamfer is a shallow angled cut or edge, usually at an angle of 45 degrees to a corner.
Concentricity – which is pronounced kon-suhn-tris-i-tee – is the quality of having the same center, as with circles inside one another.
Minor diameter – refers to the smallest diameter on a thread.
Blind Hole – refers to a hole that does not pass through a component and has only one opening.
Chip Breaker – which is pronounced chip ′brāk·ər – is an irregularity or channel cut into the face of a lathe tool behind the cutting edge to cause removed stock to break into small chips or curls. They appear to look like a design in some cases in inserts, see a few different styles in the photo above.
Length of Cut – which is often abbreviated as LOC – refers to the space between the blue arrows in the illustration. Red is simply called washout and doesn’t cut. Check our website next week to broaden your vocabulary with us.
At PF Markey, we challenge ourselves to learn a new word every week. This week’s word is Side Relief Angle. A Side Relief Angle is an angle between the part of the flanks of a cutting tool below the cutting edge and a plane perpendicular to the base. Check our website next week to broaden your vocabulary with us.