Lifting Jacks Specifications

Help with Lifting Jacks specifications:

Performance Specifications

	Lift Capacity		Lift capacity is the maximum lift force.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Lift Stroke		Stroke is the difference between the fully-retracted and fully-extended positions.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.
	Minimum Height		This is the lifting jack's minimum height or the distance from the jack base to the lifting element (saddle or shoe) in the fully-retracted position.
	Search Logic:		All matching products will have a value less than or equal to the specified value.
	Maximum Height		This is the lifting jack's maximum height or the distance from the jack base to the lifting element (saddle or shoe) in the fully-extended position.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

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Jack Type

	Jack Type
	Your choices are...
	Bottle Jack		Bottle jacks use a hydraulic cylinder for lifting and are often hand-pumped. The workpiece is engaged and lifted by a saddle at the end of the cylinder.
	Inflatable Jack		With inflatable jacks, a bag is placed under the workpiece and inflated to achieve lifting.
	Ratchet Jack		Ratchet jacks have a manual crank and ratchet-and-pawl design. They are an economical choice for relatively long-stroke jacks.
	Scissor Jack		Scissor jacks use linked, folding support members. Lifting occurs when members are drawn together, typically with a screw mechanism.
	Screw Jack		Screw jacks use the mechanical advantage of threads to lift the workpiece. Jacking may involve spinning a nut to drive a screw or worm gear drive. Most screw jacks fall into one of two categories: ball screw jacks and machine screw jacks. Ball screw jacks use recirculating ball bearings on a precision pitch screw for fast, efficient lifting. They require relatively little drive effort. Machine screw jacks use screws with less pitch, and usually do not have ball bearings. They are somewhat less efficient and require more effort than ball screw jacks; however, they can better resist back driving and vibration.
	Service / Floor Jack		Service jacks or floor jacks are designed to get under loads such as vehicles. They often have a relatively long reach.
	Toe Jack		Toe jacks use a lift toe or are shoe-mounted to stay near the floor in the retracted position. They can fit under a workpiece with little ground clearance.
	Transmission Jack		Transmission jacks are designed for lifting, removing, and installing transmissions or engines from vehicles. They usually have several saddles or lift points and a wide base for stability.
	Other		Other unlisted jack styles.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Actuation

	Actuation
	Your choices are...
	Hand		Jacks are actuated by a hand crank or screw drive.
	Foot		Jacks are actuated by foot pumping or ratcheting.
	Air / Pneumatic		An air supply is used to assist the hydraulic cylinder. Pneumatic actuation can be used as an auxiliary method for jacks that have a hand crank.
	Hydraulic		An external hydraulic cylinder or motor drives the jack.
	Electric Motor		An electric motor is used for automated driving, usually with a jack that employs a screw.
	Other		Other unlisted actuation methods.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Features

	Telescoping?		Multiple cylinder rods or other lift mechanisms are nested for successive extension to provide greater total stroke.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Horizontal / Angular Use?		Jacks may be positioned horizontally, or at an angle between horizontal and vertical positions.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Wheels?		Wheels provide rolling for easy transport and positioning.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Integral Brake?		Jacks include a brake for holding the lifted position.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Swivel Saddle?		The saddle or lift engagement end can swivel to accommodate imperfectly aligned surfaces.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
	Bypass Valve?		Bypass valves are used to prevent the jack from being driven past its load rating.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

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