Metal drills cut circular sections of metal using mechanical or hydraulic pressure. They can be manual or automated and are available for different metal types. Handheld drills are used for small projects, while larger automated units are found in commercial and industrial operations. CNC metal drilling machines create precise holes using different sized punches. A […]
Hammer drills have been used for thousands of years and are still used today. They can be operated manually or with an air piston and are useful in low-tech areas. Operators should wear protective gear, and a casing can prevent hole collapse. A hammer drill is a drill that operates through a hammering action, driving […]
A drill stand stabilizes an electric rotary device, allowing for hands-free operation. It can hold various sized rotary tools and may require lubrication. Proper use reduces fatigue and injury. A drill stand is a stabilizing device designed to hold an electric rotary device in place. The drills are loaded onto holders and locked into the […]
Power drills are motorized tools used to drill holes in materials such as wood, plastic, and metal. They are commonly used in construction and building, but also for household projects. They can be cordless or corded and have various speed settings and accessories such as drill bits and screwdriver sets. The motor and power supply […]
A countersink drill creates cone-shaped holes in metal, wood, or plastic, allowing screws to be flush with the surface. Dedicated and modified options are available, with different dimensions to consider when selecting drill bits. A countersink drill is designed to create a cone-shaped hole in metal, wood or plastic. The primary purpose of a countersink […]
Rock drills are specialized devices used for drilling into hard substrates like rock. They have hard bits made of industrial diamonds and require special training to operate. They can be rented or purchased, and come in different sizes and models for various applications. Safety features like emergency stops and cages are standard. A rock drill […]
A drill string is used to drill deep holes to extract resources. It consists of four components: BHA, transition pipe, drill pipes, and drill pipe subs. The drill string is critical to avoid system failure. Retrieval tools like drill string jars and resonant vibrators are used to remove stuck mounts. A drill string is a […]
Drilling risers are pipes used to encase drilling equipment during subsea operations. Two types of risers are available: marine and tie-back. Risers protect equipment from corrosion and pollution, and drilling fluid is used to reduce heat and carry debris to the surface. Risers allow for extended underwater drilling and reduce water pollution. A drilling riser […]
A wagon drill is a portable pneumatic drill used for rock drilling and blasting, named for its wagon-like base. It has stabilizing legs and a heavy-duty steel frame to prevent damage and operator fatigue. It can produce holes up to 4 inches in diameter and 100 feet deep. The height of the shaft is important […]
A pilot drill is used to start a hole before using a larger drill, ensuring it runs straight and is in the right place. It’s also used to prevent screws from slipping or damaging surfaces, and to avoid drill bits wandering. A center punch can be used to make an indentation before drilling. Pilot holes […]
Army drill sergeants train new recruits through Basic Combat Training (BCT) and are chosen from non-commissioned officers who have proven themselves. They supervise the training of new recruits to become effective soldiers, and completion of training concludes with the iconic campaign hat. An Army drill sergeant is a United States Army (US) non-commissioned officer (NCO) […]
A hammer drill is used to create a cylindrical opening in metal before tapping it with a carbide cylinder to cut threads for screws. The use of screws and bolts dates back to the Middle Ages, and modern taps and dies are machine-made. Craftsmen still tap and thread their own fasteners for custom work, but […]
Drill feed is the rate at which a drill bit is driven into an object to drill a hole. It is closely related to drilling speed and can be determined by factors such as equipment, composition, and workpiece material. Proper feed rate is important for efficient drilling and depends on various factors. A drill feed […]
Masonry drills are used to drill holes in hard materials, requiring a high-quality drill bit and proper technique. Electric drills rotate a drill bit with sharp edges, and masonry drills have a hammer action for better results. Tungsten carbide drill bits are recommended for masonry drilling. A masonry drill is used to drill holes in […]
An air drill uses compressed air to generate rotational force for drilling and other tasks. Pneumatic power was first used in the late 18th century for moving documents through tubes. Dental drills spin up to 800,000 RPM while jackhammers break up concrete. Few pistol grip drills are air-powered due to the bulkiness of using an […]
During the Cold War era, “duck and shelter” drills were common in schools to protect against nuclear detonation. The government sponsored an educational film featuring an animated turtle and schoolchildren demonstrating the proper way to protect themselves. The drills ended when people realized that a school desk would offer little protection against a high-yield nuclear […]
The Navy drill instructor is responsible for training new Navy recruits and is seen as one of the most important positions in the Marine Corps. The 13-week recruit training program is considered the toughest in the US military, with an attrition rate of approximately 10%. To become a Navy Drill Instructor, applicants must be between […]
To become an Army Drill Instructor, you need to hold a non-commissioned officer rank, serve a certain number of years, and attend a training school. The requirements and name for officers vary by country, but the duties are similar. In the US, achieving the rank of non-commissioned officer is the first step, and attending the […]
A drill instructor is a non-commissioned and non-combatant member of the armed forces who trains new recruits. The role has different definitions worldwide, but in the US, it is associated with an authoritarian figure who oversees every moment of a recruit’s training. Marine Corps officers hold the title of drill instructor, while other branches use […]
A gun drill is a fluted drill used for long, straight bores, with coolant pumped through one or two holes. It can be used on various materials and comes in different sizes and variations. Coolant is used to prevent overheating and extract material. Gun drills can be external or internal for chip removal and are […]
