Terminology

From September 2021 I will be going through all the entries alphabetically by maker to standardise the terminology used in my jack descriptions. This also includes measurements which I have decided to standarded in inches which was the measurement used during manufacture of the bulk of jacks in the databases. As a concession I have decimalised the fractions of an inch except where they are cast on a specific jack.

Inches are represented by ".

As of 17 November 2021 I have amended alphabetically up to and including Ern Lake jacks.

Screw Jacks

	Single Screw
	Double or twin Screw. Some manufacturers also use the suffix DL (Double Lift) in their casting as shown in this Lake & Elliot example.
	Triple Screw. Some manufacturers also use the suffix TL (Triple Lift) in their casting.
	Pinion
	Gear Wheel
	Ratchet Winder
	Droop Snoot Ratchet Winder
	Saddle jacking Plate
	Flat Jacking Plate
	L - Jacking Plate
	Channel Jacking Plate
	Round Jacking Plate
	Hinged Extension

Cantilever Jacks

	Cantilever Jack
	Cantilever Jack

Scissor Jacks

	Scissor Jack
	Scissor Jack. Sometimes referred to as a Rhombic Jack.
	Metallifacture refer to the jacking plate as a 'Step'.

Bumper Jacks

	Bumper Jack. This would normally fit under one of the bumper support irons.
Side Lift Jacks
	Side Lift jack and lifting arm.
A Frame Jacks
	A Frame jack and lifting arm.
Folding A Frame Jacks
	Folding A Frame jack and lifting arm.
Capstan Jacks
	Capstan jack.
Toe Jacks
	Toe Jack. Very low lifting toe for lifting equipment such as railway lines.
Hydraulic Jacks
	Single ram with manual screw extension.
	Double ram with manual screw extension.