In construction, a pilothole is a small hole drilled into a piece of construction material. Its purpose may be: to guide a larger drill to the appropriate...
heads used during pilothole operations, reamers and hole-openers used for hole enlargement, and swab tools which are used for hole conditioning and pullback...
earthquakes. The site consists of a 2.2 km (1.4 miles) pilothole and a 3.2 km (2 miles) main hole. Drilling operations ceased in 2007. Located near the...
environmental site assessment, mineral exploration, temperature measurement, as a pilothole for installing piers or underground utilities, for geothermal installations...
(typically a concrete pad). A small-diameter hole (pilothole) is drilled to the level required; the diameter of this hole is typically 230mm – 445mm (9" - 17...
pilothole for shaft sinking, where access exists at the bottom of the new shaft, in this case the sinking phase is dedicated to enlarging this pilot...
m., drilling of a 20 cm pilothole for the raise borer commenced. Using the normal procedure for this machinery, a pilothole was drilled, for the larger...
research drilling. The project drilled 2 different holes, first a pilothole then the main hole. The pilothole (KTB Vorbohrung, KTB-VB) was spudded on September...
This hole is stopped 1⁄4 in (6.4 mm) or so from the edge of the frame member. The second step is to drill a pilothole concentric with the pocket hole which...
are designed to either be driven into a substrate directly or into a pilothole in a substrate, and most are classed as screws. Mating threads are formed...
three different drive systems: manual, ratchet, and hydraulic. First a pilothole is drilled slightly larger than the screw of the knockout punch. Then...
drill. Hole saws typically have a pilot drill bit (arbor) at their center to keep the saw teeth from walking. The fact that a hole saw creates the hole without...
rocket motor. The hollow charge creates a pilothole in the embankment, and the HE-filled projectile enters the hole and detonates, creating a large crater...
thus no wedging. These work well, but have the drawback of requiring the pilothole to be drilled to a precise size. This size is often non-standard for most...
was piloting crashed in Jackson, Wyoming. Walton's plane crashed at 12:20 p.m. local time (1820 GMT) shortly after taking off from Jackson Hole Airport...
mechanically powered saw used for making accurate cuts without the need for a pilothole in wallboard, plywood, or another thin, solid material. The Rotozip Tool...
burning or pressure necrosis of the bone. Drilling at low speed: The pilothole is expanded by using progressively wider drills (typically between three...
"spiral-cut saw" or "RotoZip": for making accurate cuts, without using a pilothole, in wallboard, plywood, and other thin materials. Electric miter saw or...
parts that would fade away after the shot, also due to the absence of a pilothole, which makes firing completely impossible. In the spring of 2001, as commissioned...
1993, most in the first few months of boring. A 50 mm (2.0 in) diameter pilothole allowed the service tunnel to break through without ceremony on 30 October...
it. These are most frequently driven into plastics with a pre-drilled pilothole. Mechanical joint Wrench "screw drive systems". Sizes.com. 2010-12-30...
also function as screwdrivers. This is particularly useful as drilling a pilothole before driving a screw is a common operation. Special combination drill-driver...
press to force a tool, called a punch, through the workpiece to create a hole via shearing. Punching is applicable to a wide variety of materials that...
A maritime pilot, marine pilot, harbor pilot, port pilot, ship pilot, or simply pilot, is a mariner who has specific knowledge of an often dangerous or...
the hole center prior to drilling a pilothole. The term core drill bit is used for two quite different tools. A bit used to enlarge an existing hole is...
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