Hilti Powder Actuated Tool Training Hilti
Low Velocity Powder Actuated Tool Diagram A powder-actuated tool (often called a ' gun' or a 'Ramset gun' after their manufacturing companies) is a type of used in construction and manufacturing to join materials to hard substrates such as steel and concrete. Known as direct fastening, this technology relies on a controlled explosion created by small charge, similar to the process that discharges a. Powder-actuated tools come in either high velocity or low velocity types.
In high velocity tools the propellant charge acts directly on the fastener. This process is similar to a firearm. Low velocity tools introduce a into the chamber. The propellant acts on the piston, which then drives the fastener into the substrate.
(The piston is analogous to the bolt of a.) A tool is considered low velocity if the average test velocity of the fastener is not in excess of 328 ft/s (100m/s) with no single test having a velocity of over 354 ft/s (108m/s). High velocity tools may not be made or sold in the United States, however some made decades ago are still in use in shipbuilding and steel industries. The main manufacturers of powder actuated tools are Ramset, Hilti, Powers/Dewalt, Tomarco and Simpson Strong Tie. Powder-actuated fasteners are made of special heat treated steel. Common nails should never be used for powder-actuated fastenings. There are many specialized fasteners designed for specific applications in the construction and manufacturing industries.
Powder-actuated technology was developed for commercial use during the, when high velocity fastening systems were used to temporarily repair damage to ships. In the case of breach, these tools fastened steel plates over damaged areas. These tools were developed by, for the United States Navy.
Powder-actuated tools were investigated and used prior to this development; they were used as part of during the First World War and were the subject of a 1921 United States patent (US Patent No. A Ramset powder actuated fastener and the box that it is kept in. A small box of charges can be seen, (with C22 on the top) that are.22 caliber safety cartridges, or ammunition, colloquially referred to as 'charges' or 'boosters' that are loaded singly each time this particular gun is used. The colored straws in the tray contain cartridges that are loaded singly with the manual action of the breech. The cartridges are color-coded for the various strengths.
The strength of the charge determines the power of the particular charge. In the tray are also 75 mm hardened steel nails.
The heads are 8 mm and the points of the fasteners have plastic spacers (also 8 mm) to hold the fastener central in the bore, at the point. Fasteners take various forms, for example with threaded ends to use as an embedded bolt, with washers at the tips that grip softer material etc. Fasteners used in powder-actuated tools are manufactured from special steel and heat-treated to produce a very hard yet ductile fastener. Those properties are necessary for the fastener to penetrate concrete or steel without breaking.
Operation. Nail gun cartridges Powder-actuated tool cartridges are specially-designed firearm cartridges.
In many cases, the charges are ordinary firearm cartridges with modified casings, and the removed. The, developed by Smith & Wesson is common. These charges may be hand-fed, or manufactured and distributed on a plastic strip. The charges are activated when a firing pin strikes the primer, which is an explosive charge in the base of cartridge.
The primer ignites the charge, which burns rapidly. The gases released by the burning of the propellant build pressure within the cartridge, which acts either on the head of the nail, or on the piston, accelerating the nail towards the muzzle. Fastener Example Fasteners used in powder-actuated tools are not common nails. They are manufactured from special steel and heat-treated to produce a very hard yet ductile fastener. These properties permit the fastener to penetrate concrete or steel without breaking. A powder-actuated fastening results in a permanently installed fixture.
Every fastener must be equipped with some type of tip, washer, eyelet or other guide member. This guide member aligns the fastener in the tool as it is being driven and is commonly used to retain the fastener in the tool. Common nails are not suitable for powder actuated fastening.
Common fasteners There are two common powder-actuated fasteners: drive pins and threaded studs. Drive Pin - A drive pin is a special nail-like fastener designed to permanently attach one material to another, such as wood to concrete or wood to steel. Head diameters vary in size from 1/4' to 3/8'. However, for additional head bearing in conjunction with soft materials, washers, of larger diameters are either fastened through or made part of the drive pin assembly. Threaded Stud - A threaded stud is a fastener consisting of a shank portion which is driven into the base material (and is therefore not visible after fastening) and a threaded portion (which remains visible after the fastening).
Ramset
Hilti Powder Actuated Gun Safety
An object is then attached to the threaded portion with a nut. The most common thread sizes are 1/4-20, and 3/8-16. Fasteners for special applications There are also other types of fastener assemblies designed for specific applications. Examples include:.
Hilti Powder Actuated Fasteners Catalog
Breakaway Fasteners - For temporary fastening of wood forming to concrete, designed to break away after forms are removed. Weathered Fasteners - Typically used to attach lumber to steel or concrete. Magazine Fasteners - These are collated fasteners for magazine fed tools. Steel Deck Fasteners - Used to attach corrugated metal deck to bar joist or I-beam. Conduit Clips - Used to attach EMT conduit to concrete, masonry or steel. Ceiling Clips - Typically used by ceiling contractors.
Road Basket Clips - Used to secure re-bar baskets in highway construction and paving. See also. References.