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.

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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......

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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 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.

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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.

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