Reloading for the Glock G40 - carbide insert for brass

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Masonry drill bits have different head types for various applications, so make sure you’re using the right one for the job:

Pointed tips ensure accuracy and precision when starting your hole, and drastically reduce the chances of walking or jumping around. Three flats on the shank make these bits compatible with standard power drill with ⅜ or ½-inch chucks.

In my experience, multipurpose bits like these aren’t as effective as material-specific options, so if lifespan and drilling speed is your top priority–especially if working with tile–consider one of the other options on this list.

“When it comes to turning, you will still have the same general speeds and feeds as a standard machine,” says Geisel. “But the advantage with a multi-axis machine is the upper and lower turrets—one can be rough turning and the other can be drilling the hole and threading, even finishing behind the first turret.”

These inserts are designed especially for machining stainless steel and high temperature alloys, with cutting force reduced due to helical cutting edges and positive rake angles.

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Convenient wear mark indicators let you know when they’ve worn down and need to be replaced, so you won’t waste time and energy using inefficient bits. Their SDS+ shanks are compatible with rotary hammer drills.

The 2-cutter head helps direct dust through the flutes, and also features a visible wear mark, so you can clearly tell when it’s not able to create the hole diameter its intended for. This 7-piece set comes in a heavy-duty Bosch storage case, and has you covered for hole sizes from 3/16 to 1/2-inch in diameter.

It’s essential that your masonry drill bit is compatible with the drill you plan on using, whether that’s a standard drill with a hammer mode setting, or the larger rotary hammer drill. These drill types have different chucks–the opening that holds the bit in place–which only accepts a certain type of shank–the end of the bit that fits into the chuck. Drill bits with hex shanks fit into regular cordless drills, and bits with SDS+ shanks only fit rotary hammer drills.

Getting the right cut is always important, and no less so for a turning application within a multi-tasking machining centre. Yet these machines present unique cutting tool challenges for turning.

Although not technically a “drill bit”, this diamond-tipped hole saw from Milwaukee is a better option for drilling larger holes in extra-hard materials like granite, marble, and porcelain. Its high-grade diamonds create a smooth, clean hole, and a large ejection slot allows for easy slug removal when you’re finished. The quick-change hex shank also fits standard drills/drivers without needing a separate arbor to connect.

This set provides a nice range of sizes too, from 1/8 to 3/8-inches, and the clear storage case gives you a clear view of what’s inside. These bits have hex shanks, making them compatible with standard cordless drills.

I’ve always been a fan of Bosch drill bits, and this 7-piece set is a great example of their focus on speed and precision. Their asymmetric diamond-ground tips get you started quickly and accurately–with minimal walking–and allow the bit to power through brick or concrete with minimal wear. Deep-cut spirals remove drilled material as you go, increasing speed and efficiency even more.

Just like other drill bit types, masonry drill bits are available in a range of sizes, so make sure you choose the right size for your specific task. If you’re creating a hole for concrete screws or wall anchors, check the packaging to find out the proper bit size to use (some screw or anchor sets supply the correct bit needed, but I’ve found these to be of generally lower quality than the brands on our list).

Switching from a conventional shank to the Capto quick change system means that new cutting heads can be swapped out in less than 30 seconds—a much shorter cycle interruption than would be required when changing inside the machine. Repeatability is within two microns, with the Capto “sister tool” approach keeping a machine running longer than would an insert index. This is a big help, because when turning in machining centres, the key to success from a tooling perspective is flexibility.

Mazak has a range of machining centres, with four having particular applicability to turning: the Integrex i-150 (a high speed, small footprint multi-tasking machine); the Variaxis 630-5X II T (a five axis machine that Birkle says is “the gold standard in machining centres”); the Integrex e-Ramtec (for large cylindrical workpieces); and the Integrex 1-630V (machining harder materials).

If you plan on drilling through concrete with rebar, save yourself time and money by using these heavy-duty Milwaukee bits. With full carbide heads and four cutting edges, these German-made bits are specifically designed to continue drilling when they come in contact with rebar, and won’t lock up like bits with the standard 2 cutting edges.

The balancing act has to allow for the fact that when turning in a machining centre the tool will have a heat band that it has to cut within. By applying the right cooling approach, higher cutting speeds are an option without compromise to tool life and chip control. In fact, it then makes low cost, unmanned production a real possibility. CM

The advantage of turning in a multi-tasking centre is that processes are more efficient, reducing production times. However, cutting tools designed for turning within these machines have to be compatible with the technology. Often this means working with quick-change tooling systems that aren’t fully automated. One example is Coromant Capto from Sandvik Coromant, which some studies have shown is the strongest quick change system on the market.

“Coromant Capto has a unique shape at the connection,” says Dave Andrews, product manager for threading, turning, parting, and grooving at Sandvik Coromant Canada. “It’s self-locking, a tapered polygon, with lobes that don’t allow the coupling to twist. It also has face contact on the flange, so it is a very strong connection.”

Alex Rennie is a freelance writer who specializes in the Home Improvement, DIY, and Tool space. As a former residential and commercial carpenter, Alex uses his hands-on experience to write practical buying guides, how-to articles, and product reviews. His work has also appeared in Business Insider's Insider Picks, and before his writing career, he was a full-time carpenter living in New York City. There, he worked as part of a team designing, building, and installing large furniture pieces, as well as performing a variety of home repair and maintenance projects. Alex currently lives in Los Angeles, CA, and spends his free time exploring the beaches and mountains with his fiancé and their dog Louie.

Graham says Jetstream Tooling can deliver coolant to the optimum position close to the cutting edge, thus lifting the chip away from the rake face and improving chip control and tool life. Working within a machining centre, Jetstream can remove heat quickly from the cutting zone, and cool chips rapidly.

For general turning applications ISO inserts function as an international standard. Iscar, which provides a full range of carbide inserts, is one company trying to look at ways of advancing tool applicability for turning in multi-axis machining centres.

“They can run at a much larger depth of cut and greater spindle speeds,” says Geisel. “It’s often a race between us and the machine supplier, but the end result is the best tools on the best machines.”

“We used to see 100 psi to 200 psi, but Jetstream can deliver from 300 psi to 1,000 psi,” says Graham. “The implications for this high pressure coolant on turning is very dramatic. I’ve been in this business for thirty years, and this system is the most revolutionary since the advent of coatings.”

“This offers total control over the length and size of the assembly,” says McEachern. “For internal machining we have an anti-vibration product that can deliver to twelve times the length to diameter on a boring bar, with Capto as the interface.”

One example is Iscar’s Heliturn LD (for “lay down”), a helical cutting edge with high metal removal rates. This is an advance in turning, but the process itself would not necessarily be any faster if integrated with a multi-axis machine.

“We want to look at how to enhance ISO,” says Steve Geisel, senior product manager at Iscar in Toronto. “Our CNMX and DMNX lines are ISO inserts on steroids.”

If you’d rather not invest in separate bits for different materials, these multipurpose options from Bosch are a great option. Their carbide heads and sharp cutting edges are designed for use with a variety of materials, including wood, plastic, tile, metal, and masonry, and steep flutes promote optimal debris removal. If you’re not interested in a set, these bits are also available individually.

Unlike typical bits, these are specifically designed to bore through concrete and brick safely and effectively.

To get the most out of a turning application within a multi-tasking machine, however, the revolution may be more relevant to coolants than inserts. As cutting methods have improved, heat control has remained a major challenge.

“You can adapt in different ways,” adds Randy McEachern, product specialist for toolholding and holemaking products at Sandvik Coromant. “Machines with the correct flange holder can adapt to Coromant Capto, and any one of our toolholders can go on the end of that.”

“We have Jetstream Tooling, which I consider a revolutionary new coolant system,” says Don Graham, a manager at Seco Tools, Troy, MI.

If you want to be prepared for a variety of drilling tasks, I recommend purchasing a set with a range of sizes, in particular, 1/4- and 5/16-inch options. But, if you know exactly what you’re using your bit for, like drilling a pilot hole in a concrete wall, and don’t have the need or budget for a full set, masonry drill bits can be purchased individually. That said, working with masonry is especially hard on drill bits, and even the most durable options are going to wear out quicker than you think.

These 3/16-inch Bosch bits are the perfect size for drilling pilot holes for ¼-inch Tapcon concrete screws, and more than provide the minimum 1-inch depth required. With 5 identical bits, this pack has you covered for larger projects that are inevitably going to wear through multiple bits before you’re finished. They’re a great price too, saving you both time and money running back and forth to the hardware store or waiting on an online order. If you’re working with smaller 3/16-inch Tapcons, Bosch also offers a 5-packs of 5/32 bits.

Boring through concrete is tough work, so masonry drill bits need to be extremely hard to get the job done. Always make sure your masonry drill bits are made with tungsten carbide tips, which is strong enough to work effectively, and without wearing out too quickly. If you’re working with particularly hard materials, like stone or porcelain, a specialty bits with diamond coating are needed.

The dust created by drilling into concrete, brick, and stone, is harmful to humans in several ways, so it’s important to use the proper safety precautions. Concrete dust in particular is especially dangerous to your respiratory system, and contains microscopic silica particles that can cause short-term breathing issues, and long-term lung damage. Because of this, dust masks or respirators are essential when using masonry drill bits, even for a short time.

For heavy-duty applications that require the power of a rotary hammer drill, this set of Bosch bits is a great choice. Each bit features a 4-flute design that optimizes powder ejection, reducing friction and keeping the bit cooler. This also reduces overall stress placed on the bit during use, and increases its overall lifespan.

The result is increased cutting speeds for all materials, from hard Inconels at 50 per cent faster, to aluminium at 30 per cent, which Graham says is “easily possible.” The only risk? If you increase the speeds in the machining centre too aggressively you might throw a part, and downtime in a multi-tasking machine can be expensive. “The newer machines change everything you do,” says Graham. “You have to be conscious of the set-up, because a long, slender shaft with greater depth of cut may require cutting back on spindle speed due to vibration.”

These types of one-piece hole saws require more technique to operate than regular drill bits, but by following the instructions and applying water to keep the saw cool while drilling, are easy to get the hang of.

From there, extensions can make a tool longer by putting a male Capto on one end, and a female on the other to build out the assembly and also reduce the adaptor size.

Despite the budget-friendly price, these DeWalt bits still provide the rugged carbide tips necessary for effective masonry work, and a decent range of sizes to choose from. Their 4-flute design cleans away debris, as they efficiently travel through masonry, concrete, and rock.

When used with the proper drill–either a standard drill with a hammer mode setting or a dedicated rotary hammer drill–masonry drill bits are an invaluable piece of a well-rounded toolkit. Available in a range of sizes, masonry drill bits are useful for a variety of drilling tasks, from mounting a garage door opener on a brick exterior to boring holes in concrete.

“There has been a lot of attention given to milling in turning centres, but turning on machining centres is innovative,” says Chuck Birkle, vice president, sales and marketing for Mazak Corp., Florence, KY (Mazak Canada is based in Cambridge, ON).

As part of a residential and commercial carpentry crew in New York City, I used masonry bits with both hammer drill/drivers and rotary hammer drills, performing a range of anchoring and screwing tasks. I kept this hands-on experience in mind when assembling this list of options, making sure to include brands and bit types that I know and trust, and using online tested review sites to ensure I included popular and up-to-date models. I also made sure to include a useful range of sizes and bit types, to provide options for anyone, regardless of their project or tool setup.

If you plan on drilling into brick, concrete, or stone, you’re going to need to use a masonry drill bit. These specialty bits have strong carbide tips for boring through hard materials, and wide flutes to eject dust and debris to minimize friction and increase efficiency. Some even feature diamond coatings for extra challenging applications.

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To prevent this dust—and any unexpected chips—from damaging your eyes, always wear eye protection when using masonry drill bits, and if possible, choose full-coverage goggles over safety glasses for complete dust protection. Drilling into masonry is also extremely loud, so hearing protection is also recommended.