Why is it called Silver Deming?

This company began back in 1854, when Albert R. Silver and John Deming formed a company to make agricultural machines, although the "Silver & Deming" name does not date back that far. In the later history of the company, Emmor W. Silver was a principal; he was perhaps a son of Albert.

Why are they called Silver and Deming drills?

Silver & Deming History

Silver & Deming evolved from the 1854 founding by Albert R. Silver and John Deming of a company to make agricultural machines. They made a variety of machines primarily aimed at wheelwrights but eventually moved into drilling machines.

Are Silver and Deming drill bits any good?

This use requires slow speeds, high quality cutting oil, and a smaller diameter of pilot hole. Drilling through aluminium, magnesium and other soft metals do not require less torque as steel. For this reason, a Silver and Deming bit is a good choice for occasional drilling in these materials.

What is S&D drill?

SILVER AND DEMING DRILLS. Silver and Deming drills are all purpose drills and are used wherever the maximum chuck capacity is 1/2". They are also called S&D Drills, Blacksmith Drills or Prentice Drills (Canada). All Silver and Deming Drills are 6" overall length with 3" flute length.

Who invented the step drill?

Although it is claimed that the stepped drill was invented by Harry C. Oakes it was in fact first produced by Bradley Engineering, Wandsworth, London in the 1960s and named the Bradrad. It was marketed under this name until the patent was sold to Halls Ltd.uk by whom it is still produced.

Deming's Approach to Quality

Who invented the twist drill?

The twist drill bit was invented by Steven A. Morse of East Bridgewater, Massachusetts in 1861. The original method of manufacture was to cut two grooves in opposite sides of a round bar, then to twist the bar (giving the tool its name) to produce the helical flutes.

Why drill bit angle is 118?

The two most common drill bit point angles are 118 degrees and 135 degrees. The difference between the two is the shape; a 118-degree bit is steeper, more pointed and has a smaller chisel. The 118-degree bit cuts more aggressively and is generally used for drilling into soft material like wood.

What is cobalt drill bit?

What are cobalt drill bits? Cobalt bits are a combination of steel (or another alloy) mixed with a small percentage of cobalt, typically between 5 – 7%. Cobalt has a melting point of 1495°C and a boiling point of 2927°C, which makes it perfect for use at high temperatures.

What is a silver drill bit for?

They're commonly used in hammer drills to grind masonry down as they cut through it. You can use them on brickwork, stone, breeze blocks, and other hard stone surfaces. You can use them on wood, although the hole will be ragged and it'll probably take longer than a proper wood drill.

What drill do jewelers use?

Diamond Twist Drill: If you're working with gemstones, or even glass, a diamond twist drill is essential. Coated in diamond, these drills are ideal for creating small holes in gemstones for jewellery applications, and they're perfect for drilling holes in glass.

What are black drill bits for?

Black Oxide Drill Bits – Basic and Inexpensive

This reduces friction between bit and workpiece, thereby speeding up the drilling process. Bits made with a black oxide coating are suitable for work on steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon, and composite materials.

What does SDS drill bit stand for?

SDS is simply the bit retention system — or how the bit is held in the drill. There is some debate as to what the "SDS" acronym stands for. The original German interpretation was "Steck-Dreh-Sitz" meaning Insert-Twist-Stay. As the bit evolved, it has come to be known as a Slotted Drive System or Slotted Drive Shaft.

What is the hardest drill bit you can buy?

Diamond Drill Bit

Polycrystalline diamond (PCD) is one of the hardest drill bit material, which can be used on the toughest materials, such as glass and ceramic.

Why is titanium good for drill heads?

Titanium drill bits are high-speed steel drill bits (HSS) that have a titanium oxide coating. They are very hard, and corrosion-resistant. They last much longer than regular HSS drill bits, and they are good for cutting through any metal, including metal sheeting.

Which is harder carbide or cobalt?

Yes, carbide is harder than cobalt.

What is the best angle to sharpen a drill bit?

Aim for that 60-degree angle, and an angle and point that's the same width on both sides of the drill bit, to enable the tool to bore straight holes.

Which angle should you not change when drilling grinding?

For general purpose drilling, a point angle of 118° is recommended.

What is the best drill bit angle?

For hard materials such as steel and stainless, 135-degree bits are best. The shallow angle allows the bit to cut into the material without dulling quickly, however that same shallow angle makes for a bit that wants to walk around, requiring a center punch. The 135 angle is much flatter, as you can see here.

Why is it called a Morse taper?

The Morse Taper was invented in 1864 by Stephen A. Morse, an enterprising mechanic, who developed it to reliably join two rotating machine components.

What is a Morse taper chuck?

A Morse Taper is a tapered spindle used on lathes and drill presses to mount tooling. Morse Tapers on the headstock of your lathe have a hollow housing that is designed to fit a male ended arbor. When spinning, the arbor is forced farther into the housing, increasing the surface pressure between the two metal parts.

What degree is Morse taper?

The taper angle of the Morse taper varies somewhat with size but is typically 1.49 degrees (around 3 degrees included).

Do you drill steel fast or slow?

In general, it's a good idea to drill through metal using as slow a speed as possible using a drill bit for metal. Hard metals like steel and larger drill bits require even slower speeds. With a small twist bit (1/16 in. to 3/16 in.), you can drill through most metals at 3,000 rpm.

Is cobalt or titanium drill bits better?

Cobalt drill bits are more expensive, but offer longer life, and are more resistant to heat than titanium drill bits. Cobalt drill bits are also tougher and can drill holes in the hardest metals. Here is a quick comparison chart that explains the key differences between titanium vs cobalt drill bits.

What is the hardest metal to drill through?

The basis for many of the hardest drill bits is tungsten carbide. A metal that is five times stronger than steel, tungsten carbide by itself makes for a very hard drill that's quite resistant to heat.

Can I use normal drill bits in an SDS drill?

You cannot use standard rotary drill bits cannot in SDS drills. But, you can use SDS chuck adaptors with many SDS drills, which allow them to take standard drill bits. You should only use an SDS drill with an adaptor, and standard drill bits in rotary mode, with the hammer action switched off.