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Model Engineering Glossary


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d (deci)

The prefix d or deci indicates the unit should be multiplied by 10-1.

See also: Decimal Prefixes.


da (deca)

The prefix d or deca indicates the unit should be multiplied by 10.

See also: Decimal Prefixes.


Dandelion Metal

72 % Lead 10 % Tin 18 % Antimony


Dead Centre

A centre that does not rotate found on the tailstock of a lathe.

or

The exact centre of an object.

See also: Centres.


Decimal Prefixes

pico to tera and their multiplication factors. more......


Decimal to Imperial Conversion

See: Conversion of Units.

Search for unit conversion books on Amazon.co.uk

Diamond Abrasive

Diamond is the hardest natural abrasive material. Diamond abrasive stones are quite commonplace and great for hand grinding the edge on high speed steel tools.

    Advantages
  • less heat generated in the grinding process
  • high grinding quality and precision as the tool does not change shape very quickly
  • long lifespan

Diamond Bronze

88 % Copper 10 % Aluminium 2 % Silicon


Die Holder

Die Holder


di-ethyl ether

Trade name: Ether

Chemical formula: (C2H5)2O

See also: Chemical Table.


Diffusion Bonding

A solid-state process for joining metals by using heat and pressure to achieve atomic bonding.

Display Cases

Once complete it is a good idea to finish the model and keep it clean with a display case. There are a number of different ways in which a display case may be constructed. more......

Dividing Plate

A plate with evenly spaced holes at a given radius that allow you to rotate a chuck and then hold it precisely at a given number of intervals. This can then be used for gear cutting, machining facets at precise points or for drilling holes in a cylinder end cover for fixings.

This image shows the plate mounted to the back of a lather spindle and with a pointed indexing bar.


Drill Bits

Normally made of hardened or high speed steel with two cutting edges on the conical end with two helical flutes that act to move material away from the cutting edges. more......


Duralumin

4 % Copper 95 % Aluminium 0.5 % Manganese 0.5 % Magnesium

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z