Model Engineering Glossary

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n (nano)

The prefix n or nano indicates the unit should be multiplied by 10^-9.

See also: Decimal Prefixes.

Naval Brass

59 % Copper 1 % Tin 40 % Zinc

Newton's Laws of Motion

• Newton's First Law Every body continues in its state of rest or of uniform motion in a straight line unless acted on by some external force
• Newton's Second Law The rate of change of momentum of a body is directly proportional to the external force acting on the body and takes place in the direction of the force.
• Newton's Third Law If body A exerts a force on body B, then B exerts an equal and opposite force on A.

Nichrome

60 % Nickel 26 % Iron 2 % Manganese 12 % Chromium

Nickel

In its pure form it is used for plating and coinage. It is the main constituent in Permalloy and nickel-chromium alloys. Also used in nickel-silver and various types of steel. more......

Nickeline

80 % Copper 20 % Nickel

Nickel Silver

72.5 % Copper 27.5 % Nickel

Nickel Steel

Steel containing between 0.5 to 6% Nickel. This increases the strength of steel in its normal condition.

Ni-hard

Nickel in the ratio of 4¹/₂% is added to Cast-iron to produce a martenistic and abrasion resistant alloy.

Nickel Silver

Nickel silver alloys (sometimes called German silver) derive their name from their bright silvery appearance though they actually contain no silver at all.

Nickel Tungsten

83 % Nickel 17 % Tungsten

Nickeltin

50 % Tin 50 % Nickel

Nilex

36 % Nickel 64 % Iron

Ni-Resist

6 % Copper 14 % Nickel 78 % Iron 2 % Chromium

Nitric Acid

Chemical formula: HNO₃

See also: Chemical Table.

Nitrous Oxide

Trade name: Laughing gas

Chemical formula: N₂O

See also: Chemical Table.

Number Drills

This system of numbering drills is no longer used, but may be of use in deciphering old drawings. more......

See also: Letter Drills.

Nuts & Bolts

See also: B.A. Threads.

NVR Switch

This particular start/stop switch is a KDJ12 16A unit. No-Volt-Release (NVR) switch, provides safety in the event of an interruption of power.

These switches can get dirt/dust inside which can mean they cut-out or will not make contact.

Nylon

Tough, resilient, good wear and impact resistance. Good chemical resistance and flexural fatigue resistance. Continuous working temperature: 100°C (max 160°C).

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