The most versatile of these is the twist bit, a cylindrical shaft with a cutting edge wrapped around it like stripes on a candy cane. The most common kinds of accessories are drill and screwdriver bits.ĭrill bits, like the drills that turn them, come in a variety of shapes and designs. These pieces, which are designed to fasten into the chuck, can accomplish a surprising number of tasks. Of course, a power drill is useless without accessories. Read on to learn about selecting the right drill or screwdriver bit for the job, and discover ways in which you might not have thought to use power drills. The gear once tightened by a key is fitted with a grip, allowing the user to secure the bit by hand. Until the 1980s, chucks were keyed, meaning you needed a special tool to tighten them. The last major part of a drill is the chuck, a mechanism into which you fasten the drill or screwdriver bit. When the drill reaches the preset clutch setting, the clutch disengages the drive shaft, allowing the motor to turn but not the drill or screwdriver bit. The higher the clutch setting, the higher the torque a drill puts out. Many drills have an adjustable clutch, some with as many as 24 settings. With a variable speed trigger and multiple speed settings, you can operate your drill between zero rpm and the top speed of each setting.įrom the electric motor, the drive shaft transmits the rotation through the clutch, which regulates the drill's torque. Cheaper models run at a single top speed, but pricier models offer between two and four maximum speed settings, usually ranging between 200 and 2,000 rpm. Today's drills usually have a variable speed trigger, meaning that the harder you squeeze, the faster the electric motor spins the drive shaft. Today's drills offer a wide variety of features that make these tasks easier and more accurate, including high-capacity nickel-metal-hydride batteries, variable speed triggers, and even built-in levels and LED work lights.Ī trigger switch, located in the same place you might expect the trigger of a pistol, gets the drill moving. Numerous accessories can fit into in the chuck, allowing the drill to bore holes, drive screws, and sand, polish, and grind a wide variety of materials. The drill's mechanism is actually quite simple: A trigger switch activates an electric motor, which in turn drives a rotating chuck. Of course, roadside surgery is one of the more unconventional uses for power drills, which are among the most common and versatile power tools on the market. He grabbed the best surgical tool available in a snowy church parking lot in rural Idaho - a Makita cordless power drill - and bore a hole in King's skull, relieving the pressure and ultimately saving his life. Keith Sivertson made a bold but calculated decision. When paramedics finally transferred King to the helicopter, an intracranial bleed had caused the pressure in his head to rise to a critical level. But deteriorating weather conditions made it impossible for the helicopter to land near King's home, so the injured man had to be driven to Shoshone, 43 miles (69 kilometers) south of Hailey, to meet it. King suffered a severe head injury and needed to be airlifted to the nearest neurosurgeon. It was a snowy December night in 2003 when Ben King fell down a flight of stairs in his Hailey, Idaho, home.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |