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The most common causes are accidents with grease guns, paint sprayers, and pressure washers, but working on diesel and gasoline engine fuel injection systems as well as pinhole leaks in pressurized hydraulic lines can also cause this injury. Additionally, there is at least one known case of deliberate self-injection with a grease gun. [2]
Extreme pressure additives are usually used in applications such as gearboxes, while antiwear additives are used with lighter load applications such as hydraulic and automotive engines. Extreme pressure gear oils perform well over a range of temperatures, speeds and gear sizes to help prevent damage to the gears during starting and stopping of ...
The grease gun hose is usually at a sharp angle (e.g. 70-90°) to the axis of the nipple but can be approached from any azimuthal angle. It is not possible for grease pressure to force this type of connector away from the nipple. Grease fittings are commonly made from zinc-plated steel, stainless steel, or brass.
Lincoln patented the first lever grease gun to work with a full stroke operation called the Model 1242. This meant that a hand-held grease gun could generate up to 10,000 lbf/in² (70 MPa) of pressure. Operators of the unit could push grease into blocked or "frozen" fittings and the unit allowed for work in confined areas.
A grease gun (pneumatic) A grease gun is a common workshop and garage tool used for lubrication. The purpose of the grease gun is to apply lubricant through an aperture to a specific point, usually from a grease cartridge to a grease fitting or 'nipple'. The channels behind the grease nipple lead to where the lubrication is needed.
A true grease consists of an oil or other fluid lubricant that is mixed with a thickener, typically a soap, to form a solid or semisolid. [1] Greases are usually shear-thinning or pseudo-plastic fluids, which means that the viscosity of the fluid is reduced under shear stress.
Halocarbons (chlorinated paraffins), for extreme pressure operations; Glycerol mono oleate; Stearic acid, adhering to surfaces via reversible adsorption process under 150 °C, which limits its use to mild contact conditions. Some formulations use colloidal PTFE , but its efficiency is controversial.
Friction modifiers and extreme pressure additives shall not be used. API Category GL-2 (inactive [ 3 ] ) designates the type of service characteristic of automotive type worm-gear axles operating under such conditions of load, temperature and sliding velocities, that lubricants satisfactory for API GL-1 service will not suffice.