Heat treating process that releases internal stress in hardened steel and increases toughness. Tempered steel will not crack under heavy stress or vibration or impact. Should be done as soon after hardening.


Related Terms

PINCH BAR

A pointed lever, used somewhat like a crowbar, to roll heavy wheels.

MECHANICAL SCALE

A weighing device that incorporates a number of levers with precisely located fulcrums to permit heavy objects to be balanced with counterweights or counterpoises.

MAT

1. A steel or concrete footing under a post. 2. Mesh reinforcement in a concrete slab. 3. A heavy steel-mesh blanket used to suppress rock fragments during blasting.

LIFTING BLOCK

[MECHENG] Acombinationofpulleys and ropes which allows heavy weights to be lifted with least effort.

LEWIS

A device for hoisting heavy stones; employs a dovetailed tenon that fits into a mortise in the stone.

LEAD WIRE

One of the heavy wires connecting a firing switch with the cap wires.

JIM CROW

A device with a heavy buttress screw thread used for bending rails by hand.

HOBNAIL

A short, large-headed, sharp-pointed nail; used to attach soles to heavy shoes.

HEAVY FORCE FIT

A fit for heavy steel parts or shrink fits in medium sections.

DERRICK

A device for hoisting and lowering heavy weights, cargo, stores, etc

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