Spade bits feature a simple design that is best for drilling holes in soft woods. These drill bits are inexpensive and are best for rough construction ...

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Titanium bits look like twist bits, but they’re coated in a titanium alloy. They’re easily recognisable as they have a gold-coloured coating. The titanium makes the bit much harder and is slightly self-lubricating, which makes it perfect for drilling hard metals. However, you won’t really notice any benefit if you’re using titanium bits on wood and plastic.

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Hole saw bits are similar to wood spade bits, but they have a few key differences. They’ll still cut rough circles in wood, but they can also handle other materials like plastic and metal, too. Unlike wood spade bits, hole saw bits cut through wood rather than gouge it out, so they’re a little bit neater. However, this also means they have to cut a hole right the way through a surface. If you only want to gouge out a small divot in a piece of wood without piercing through the other side, you’ll want to use a wood spade bit instead. You can easily identify a hole saw bit thanks to their distinctive serrated edge.

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Applications for tapered threaded pipes provide an effective seal for pipes transporting liquids, gases, steam, and hydraulic fluid. They are used in various industries—power plants, gas and oil, chemical, manufacturing, and shipping. For example, many pressure systems onboard ships use BSP, while many oil and gas industry applications use NPT fittings. Both NPT and BSP threads have been adopted for use with a wide range of materials. In addition to steel and brass, the threads are used with bronze, cast iron, and plastics such as PTFE, PVC, and nylon.

NPT threadangle

Star head screws (also called Torx screws) have a six-pointed star-shaped slot that’s very easy to recognise. You’ll most often find them in electrical appliances. Use a star screwdriver bit (you might see them called Torx bits, too) for best results.

(RPM) we can calculate the Meters Per Minute. (MPM) of feed rate of the ... When calculating a metric screw thread, the thread pitch measurement is taken.

You can usually use Phillips and PoziDriv interchangeably, although we don’t recommend it. Doing so increases the risk of your drill camming out (slipping out of the slot), which can damage the screw, the screwdriver bit, and it can even cause injury.

Today, these two sealing systems are not inherently better than each other. Each thread works effectively despite the two different designs. In fact, for well over a century and a half later, the use and application of either thread have depended on where it’s manufactured. Contact us to discuss which thread works best for your needs!

Both threads have the same pitch and familiar-shaped peaks and valleys. However, the designs of the threads differ in two fundamental ways. With NPT, the peaks and valleys of the threads are flat. In BSP, they are rounded. Secondly, the NPT angle of the thread is 60 degrees, and the BSP angle is 55 degrees.

Phillips screws are the most common kind you’ll find. They have a small cross on the head which doesn’t quite span the diameter of the screw. As you might expect, you’ll need the correct-size Phillips bit for one of these. Phillips bits have a pointed tip and a slight taper which helps it dig into the screw head.

You can find most of the above (and more, including a metal ruler, a bandoleer, and a set of gauges) with the MYLEK 118-piece drill bit kit. You never know when you’ll need some specialist drill bits, so being prepared could save you a lot of headaches!

Countersink bits look a bit like arrows from the side – they have a fluted, cone-shaped tip. You can use countersink bits if you’re doing anything that requires flat-head screws. They bore a cone-shaped recess in wood which allows the screw to fit snugly into the hole without jutting out. This makes whatever you’re working on look better, but it also results in a stronger attachment.

Screwdriver bits do exactly what it says on the tin. If you’ve ever struggled to put together some flat-pack furniture, you’ll probably know how important it is to have the right size screwdriver bits to hand! While all screws do essentially the same thing, there are many different types. Each type of screw has a different slot on the head, which means they all need different screwdriver bits.

BSP is the abbreviation for British Standard Pipe. The thread, as defined by the ISO 228 standard, uses Whitworth standard threads and is among several technical standards for screw threads that have been adopted internationally for interconnecting and sealing pipes and fittings. It has been adopted as a standard in plumbing and pipe fitting nearly worldwide.

The U.S. standard for tapered threads was established by William Sellers in 1864. Then, as president of the Franklin Institute, he proposed new standards for nuts, bolts, and screws to replace the poorly standardized screw thread practice in the U.S. His thread design gained wide acceptance primarily because of the flattened peaks and valleys, and the 60-degree angle was easier for ordinary machinists to manufacture and produce.

Masonry bits look like larger twist drills with a slightly tighter corkscrew shape. You can identify them thanks to their wide arrow-shaped heads. 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.

NPT threadvs BSP

Sanding drums are incredibly useful things to have around the house! They’re cylinders of sandpaper that let you use your cordless drill as a sort of portable belt sander. They let you precisely sand down wood, so they can be used to correct warping in water-damaged door frames, sand down splintered bannisters, and more.

Sometimes, you’ll need to drill a bigger hole than a standard bit will allow. Perhaps you want to put a cable-tidy hole in the back of a desk, or maybe you need a hole big enough to feed a pipe through. There are many different drill bits which are specially designed to bore wide, circular holes in material, and there are a few differences between them all.

NPT and BSP tapered threads are utilized because, unlike straight threads, a taper thread can be pulled tightly to make a fluid or air-tight seal. Straight thread applications are designed to simply hold pieces together, whereas a tapered thread, when torque is applied, will compress and seal the fitting.

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NPT threadfull form

HSS bits are a little tougher and can drill through harder materials quicker and without blunting. They’re made using special alloys which helps them resist temperatures of up to 500°C, which is especially useful when drilling harder metals!

You’ll need a drill to do even the most basic DIY jobs around the house, whether it’s putting up a shelf or installing a light fitting. Most cordless drills come with a few basic drill bits anyway, but for some DIY jobs, you might need something extra. A specialist drill bit can offer more power, more precision, and a cleaner hole depending on what you’re drilling.

The necessity to standardize screw threads began in earnest with the onset of the Industrial Revolution in the early nineteenth century. Standardization was needed to facilitate compatibility between different manufacturers and users.

1/2npt threaddimensions in mm

Click on a calculator name from the list below, enter your data, and let ... Surface Feet Per Minute (SFM). Revolutions Per Minute, Cutter Diameter (In).

If you need to bore a precise hole, you’ll need a Forstner bit. These bits have a circular, flat cutting edge surrounding a short centre pilot point. These bits can cut holes at an angle and they can even bore overlapping holes. If you need clean holes bored with precision, this is the way to go!

Most screwdriver bits are made from a chromium-vanadium steel alloy, so you might see them called CRV screwdriver bits. Don’t worry about this, though – it’s the shape of the bit you should be looking out for. Here’s how you can identify what screw you’re looking at so you know which screwdriver you need.

SFM, an abbreviation for Surface Feet per Minute, is a key concept that directly influences machining speed, tool life, and surface finish.

Socket bits are half drill bit, half socket. They can either be used as an extended hex shank for a screwdriver bit, or they can be used as a ratchet to tighten nuts and bolts. They’re quite easy to identify, as they’re cylindrical with a (usually) hexagonal socket at the end.

Steel bits are the softest, cheapest bits you can find. They’re good for drilling wood or plastic, and while they can be used to drill through harder materials like brick or metal, they will blunt quite quickly. Blunt bits can snag as they bore through materials, leading to ragged holes and splits. For drilling through these hard surfaces, you’ll probably want a harder drill bit to match.

Npt threadchart

Over two decades earlier in Britain, in 1841, Joseph Whitworth had proposed his thread design, which was quickly adopted by many British railroad companies and became a national standard for the United Kingdom called British Standard Whitworth.

Npt threadtypes

Twist bits are the most common kind of drill bit. Most standard drills will usually come with a few differently-sized twist drill bits. They’re easy to recognise thanks to their corkscrew-like groove. You use twist bits to drill holes in flat surfaces, but depending on the material you’re drilling (metal, wood, brickwork, etc) you’ll need a slightly different twist drill to get the job done right.

Slot screws have a single slot that goes from one side of the head to the other. They’re very common and are often found in flat pack furniture. You’ll need a slot screwdriver to fit them; slot screwdriver bits have a flat, blade-like design that looks like the end of a chisel.

Excellent for a wide-range of signmaking lettering and engraving tasks this set is specially designed for creating signs and other CNC projects in a variety ...

Many boring bits leave a rough or jagged hole in the surface you’re working on. If the material is an unusual shape, a sanding drum might be a bit awkward to use. That’s where grinding stones come in – they’re small, rough stones that come in a variety of shapes to help you grind, deburr, and buff rough surfaces. They’re a bit more versatile than sanding drums, but also usually a bit finer, so they’re better for smoothing out small, trick spots than wide, flat surface.

NPT threaddimensions PDF

Brush bits are very simple, but they come in many varieties. They’re essentially small, circular brushes that fit onto the end of your drill. Soft brushes are used for buffing and polishing metal surfaces, whereas wire brushes tend to be used for clearing debris out of holes and pipework. Some fine wire brushes are similar to iron wool scourers, and can also be used for scuffing or finishing varnished wood. Make sure you check what your brush is made of before you use it as some aren’t suitable for use on certain materials. For example, if you’re working with stainless steel, you’ll want to make sure you have a stainless steel wire brush – other types of steel can contaminate stainless steel.

Pozi screws look a lot like Phillips screws, except for an extra small set of grooves that flare out from the centre of the main cross shape. A PoziDriv screwdriver bit has a blunt tip and parallel flanks, so it’ll fit snugly into the slot.

Wood spade bits are also called paddle bits because of their wide, flat shape. They’re used for quickly boring out large, circular holes into wood. Unless you work in construction or are a fan of woodworking, you probably won’t have much use for these. If you do use one, remember to use a “sacrificial” piece of scrap wood underneath your workpiece. This is because spade bits cause splintering when they pierce all the way through a piece of wood.

Some screws come with two slots which make a cross shape. You can use a regular slot screwdriver bit here, or you can use a crosshead screwdriver bit for extra purchase.

Npt threadsizes

NPT is the abbreviation for National Pipe Thread Tapered, which is the U.S. standard for tapered threads used to join pipes and fittings. They were established as a standard by the American National Standard Pipe Thread, commonly called the National Pipe Thread Standards. NPT is one of the U.S. national technical standards for tapered and straight thread series used for various purposes, such as rigidity and pressure-tight sealing.

Square screws are easy enough to recognise – they have a square socket on top of the screw head. Look for a square screwdriver bit to fit them. You’ll usually only find them in electrical fittings or on construction sites. The square design means you’ll almost never cam out when using one provided you have the right size bit.

Even though up through the 1860s, this standard was often used in the United States and Canada, it was not universally accepted. It often competed with many other standards used by a multitude of companies. Sellers thread eventually won out in the U.S. when his standard was used for work done under government contracts and then became a standard for influential railroad industry corporations. Many corporations soon followed, adopting it as the national standard in the U.S.

The difference between NPT vs. BSP threads has more to do with where you live than their applications. NPT and BSP are pipe thread standards for screw threads used on pipes and pipe fittings to seal pipes.

Flat countersinks are used for finishing and shaping bores. Countersinks are passed through bore diameters for deburring or for creating cylindrical ...

When it comes to DIY, it’s important that you have the right tools for the job. This goes double for when you’re using a drill!  As you might imagine, drilling holes around your home without the knowledge or tools to do it properly can get messy pretty quickly.