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Materials and Geometric Dimensioning and Tolerancing: what works and what does not
Geometric Dimensioning and Tolerancing is a symbolic language on the drawing that controls form, orientation and position It is used for saying what a part actually has to do, instead of relying on plus minus dimensions
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Materials and Surface Roughness: what works and what does not
Surface Roughness is the measure of the fine peaks and valleys left on a surface by the manufacturing process It is used for controlling friction, wear, sealing and appearance on a finished face. Typical values: paramete
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Materials and First Article Inspection: what works and what does not
First Article Inspection is a full dimensional check of the first part from a new setup, reported against the drawing It is used for proving that the process can make the part before the batch is committed. Typical value
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Materials and EN 10204 Material Certificates: what works and what does not
EN 10204 Material Certificates is a standard that defines the type of inspection document supplied with a material It is used for proving that the material in the part is what the drawing called for. Typical values: type
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Materials and PPAP Submission: what works and what does not
PPAP Submission is the production part approval process used in the automotive supply chain, at four levels of evidence It is used for proving that a production process can make the part repeatedly, before series supply
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Materials and ISO 2768 General Tolerances: what works and what does not
ISO 2768 General Tolerances is a standard that sets the tolerance for dimensions that have no individual tolerance on the drawing It is used for keeping a drawing readable, by not dimensioning every non critical size. Ty
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How to specify Horizontal Machining Centre on a drawing
Horizontal Machining Centre is a milling machine with a horizontal spindle and a rotary table, usually with pallet exchange It is used for parts that need work on several faces in one setup, and for unattended running. T
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Materials and Bearing Housings: what works and what does not
Bearing Housings is a bore and shoulder arrangement that locates a rolling bearing and keeps it square It is used for rotating assemblies where the bearing position sets the shaft alignment. Typical values: bore toleranc
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Materials and Hydraulic Manifolds: what works and what does not
Hydraulic Manifolds is a block with drilled and ported passages that connects valves, pumps and actuators It is used for replacing pipework with a single machined block, in mobile and industrial hydraulics. Typical value
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Materials and Heat Sinks: what works and what does not
Heat Sinks is a machined or extruded finned body that carries heat away from a component It is used for power electronics, LED assemblies and any enclosure that generates heat. Typical values: material aluminium, or copp
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