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Small Drill

৳ 800.00

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Category: Tools & Kits Tags: Motor Drill, Small Drill
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Description

Small Drill

A Small Drill or Small drilling machine is a tool primarily used for making round holes or driving fasteners. Small Drill is fitted with a bit, either a drill or driver, depending on application, secured by a chuck. Some powered Small Drills also include a hammer function.

Small Drills vary widely in speed, power, and size. They are characteristically corded electrically driven devices, with hand-operated types dramatically decreasing in popularity and cordless battery-powered ones proliferating.

Small Drills are commonly used in woodworking, metalworking, machine tool fabrication, construction and utility projects. Specially designed versions are made for medicine, space, and miniature applications.

Around 35,000 BC, Homo sapiens discovered the benefits of the application of rotary tools. This would have rudimentarily consisted of a pointed rock being spun between the hands to bore a hole through another material.

This led to the hand drill, a smooth stick, that was sometimes attached to flint point, and was rubbed between the palms. This was used by many ancient civilizations around the world including the Mayans. The earliest perforated artifacts, such as bone, ivory, shells, and antlers found, are from the Upper Paleolithic era.

Bow drill (strap-drills) are the first machine drills, as they convert a back and forth motion to a rotary motion, and they can be traced back to around 10,000 years ago. It was discovered that tying a cord around a stick, and then attaching the ends of the string to the ends of a stick(a bow), allowed a user to drill quicker and more efficiently.

Mainly used to create fire, bow-drills were also used in ancient woodwork, stonework, and dentistry. Archaeologists discovered a Neolithic grave yard in Mehrgarh, Pakistan dating from the time of the Harappans, around 7,500–9,000 years ago, containing 9 adult bodies with a total of 11 teeth that had been drilled.

There are hieroglyphs depicting Egyptian carpenters and bead makers in a tomb at Thebes using bow-drills. The earliest evidence of these tools being used in Egypt dates back to around 2500 BCE. The usage of bow-drills was widely spread through Europe, Africa, Asia, and North America, during ancient times and is still used today.

Over the years many slight variations of bow and strap drills have developed for the various uses of either boring through materials or lighting fires.

The core drill was developed in ancient Egypt by 3000 BC. The pump drill was invented during Roman times. It consists of a vertical spindle aligned by a piece of horizontal wood and a flywheel to maintain accuracy and momentum.

The hollow-borer tip, first used around the 13th century, consisted of a stick with a tubular shaped piece of metal on the end, such as copper. This allowed a hole to be drilled while only actually grinding the outer section of it. This completely separates the inner stone or wood from the rest, allowing the drill to pulverize less material to create a similarly sized hole.

While the pump-drill and the bow-drill were used in Western Civilization to bore smaller holes for a larger part of human history, the Auger was used to drill larger holes starting sometime between Roman and Medieval ages.

The auger allowed for more torque for larger holes. It is uncertain when the Brace and Bit was invented; however, the earliest picture found so far dates from the 15th century. It is a type of hand crank drill that consists of two parts as seen in the picture. The brace, on the upper half, is where the user holds and turns it and on the lower part is the bit.

The bit is interchangeable as bits wear down. The auger uses a rotating helical screw similar to the Archimedean screw-shaped bit that is common today. The gimlet is also worth mentioning as it is a scaled down version of an auger.

In the East, churn drills were invented as early as 221 BC during the Chinese Qin Dynasty, capable of reaching a depth of 1500 m. Churn drills in ancient China were built of wood and labor-intensive, but were able to go through solid rock.

The churn drill appears in Europe during the 12th century. In 1835 Isaac Singer is reported to have built a steam powered churn drill based on the method the Chinese used.

Also worth briefly discussing are the early drill presses; they were machine tools that derived from bow-drills but were powered by windmills or water wheels. Drill presses consisted of the powered drills that could be raised or lowered into a material, allowing for less force by the user.

The next great advancement in drilling technology, the electric motor, led to the invention of the electric drill. It is credited to Arthur James Arnot and William Blanch Brain of Melbourne, Australia who patented the electric drill in 1889.

In 1895, the first portable handheld Small Drill was created by brothers Wilhem & Carl Fein of Stuttgart, Germany. In 1917 the first trigger-switch, pistol-grip portable Small Drill was patented by Black & Decker. This was the start of the modern Small Drill era. Over the last century the electric drill has been created in a variety of types and multiple sizes for an assortment of specific uses.

Small Drill description
  • Universal tool with replaceable precision high-speed steel drill bit (0.5 ~ 3.0mm)
  • High-quality products for drilling, grinding, polishing , cutting , etc.
  • Compact design, comfort grip
  • ABS plastic body , light weight , suitable for long work
  • Quick change chuck device , without any tools
  • Replace the different bits and chuck holes can be drilled with different pore sizes
  • Use matching wheel and grinding wheel , can be grinding, polishing , cutting , etc.
  • Small size, light weight, easy to carry
Small Drill set list : ( ie standard )
  • Mini drill a High-speed steel drill bit :5
  • Chuck 5 ( internal diameter respectively 0.5 ; 1.0 ; 1.5 ; 2.5 ; 3.0 )
  • Polished ceramic grinding wheel :4
  • Cut a grinding wheel
  • Adaptor: 1 ( output 12V500MA DC)
  • Box 1
Specifications
  • Chuck : 0.2-3.0 mm
  • Torsion : 530g/cm
  • No load speed : 12000/rpm
  • There load speed : 8000/rpm
  • Power consumption : 500mA DC-12V
  • Output voltage : AC 220V/50Hz

Small Drill

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