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P Is for Pitch

Metalworking Glossary for the Letter P

See the index to the Glossaries here:

https://www.gearheadsurplus.com/blog/2295-metalworking-glossary.html

- Pancake Forging. A quickly and easily created rough forged shape that is usually flat.
- Parallels. A pair of accurately ground hardened steel bars made to an exact size to support work in a precision setup.
- Parting Line. The po...

O Is for Oxidation

Metalworking Glossary for the Letter O

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https://www.gearheadsurplus.com/blog/2295-metalworking-glossary.html

- Offset. A defect in a forging caused when the dies did not align properly.
- Oil Country Lathe. An oil country lathe is a large, specialized lathe for machining long workpieces such as segments of drill strings that are used i...

N Is for Nonferrous

Metalworking Glossary for the Letter N

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https://www.gearheadsurplus.com/blog/2295-metalworking-glossary.html

- Negative Rake Angle. A tool has a negative rake angle when the face of the cutting tool slopes away from the cutting edge at outer side. A negative rake angle makes the tool blunter, which increases the strength of the cuttin...

M Is for Machining

Metalworking Glossary for the Letter M

See the index to the Glossaries here:

https://www.gearheadsurplus.com/blog/2295-metalworking-glossary.html

- Machinability. The characteristic of a metal or other material showing the relative ease of machining it to produce a satisfactory surface finish.
- Machine Tool. A power-driven machine designed to bore, cut, drill, or grind m...

L Is for Lathe

Metalworking Glossary for the Letter L

See the index to the Glossaries here:

https://www.gearheadsurplus.com/blog/2295-metalworking-glossary.html

- Lap. In forging, a lap is a type of a surface defect that appears like a seam or fissure caused by folding over an extrusion like a fin and forging it into the surface of the workpiece.
- Lapping Plate. A lapping plate is used for...

K Is for Key Seat

Metalworking Glossary for the Letter K

See the index to the Glossaries here:

https://www.gearheadsurplus.com/blog/2295-metalworking-glossary.html

- Kerf. The width of the cut made in a workpiece by a saw blade.
- Key. The term key can refer to different things related to machine tools, including the T-handle wrench used to secure chucks, an actual key to unlock a mechanism...