1pc 15/20/25/30/35mm Carbide Forstner Drill Bit
Forstner bits are guided by the wide outside rim of the bit, unlike most drill bits, which are guided by the tip. Because of that, they can be used along with a drill press to drill angled holes, holes that partially overlap, and holes on the edge of the material.
Package & Shipping:
- Free shipping all over the world
- 1pc Forstner Drill Bit
- To Korea, Japan : it take about 7-10 days
- To USA, CA, Spain, France, Poland, Belgium, Portugal, United Kingdom, Germany, Italy and Netherlands: it take about 12 - 20days
- To other European countries and Ukraine,Belarus,Russian Federation: it take about 15-30 days
- To other countries: it take about 20-35 days
Features:
- This drill bit use of advanced technology manufacturing, high-quality materials, long service time.
- Drill holes neat, smooth, no broken edge, will not produce tremor phenomenon.
- Incision resistance is small, improve the drilling speed, chip removal easily.
- Can be used for a variety of wood, wood products, plastics, plywood and other materials openings.
- Easy to install, easy to use, only need to be installed in the ordinary hand drill can be used.
Specification:
- Type: Auger Drill Bit
- Material: Tungsten Carbide
- Size: 15mm 20mm 25mm 30mm 35mm
- Shank Dia: 8mm (15mm 20mm) 10mm(25mm 30mm 35mm)
- Application: Can be use for product perforation, door installation, shoots, plastic products, wood and plywood
What Is a Forstner Bit?
Named after Benjamin Forstner who first patented the design in 1886, Forstner bits allowed woodworkers to make holes without a long “lead screw” essentially damaging the workpiece. In other words, it allowed them to drill clean, flat-bottom holes.
While the Forstner bits today are slightly different in design as they adopted a split-ring design and a “pointy tip” instead of the “lead screw.” Their purpose remains largely the same, though.
In applications where absolute accuracy and cleanliness of the drilled holes is necessary, Forstner bits are used with drill presses. That said, they can also be used with hand drills.
Forstner Bit vs. Spade Bit vs. Hole Saw: What Are the Differences?
Now that you know what each of the different types of drill bits looks like, let’s take a look at what the differences between them are. This will also help you determine which of them is the best tool for the job you need to get done.
Cleanliness of Cut and Speed
If all you need is to drill a hole through a piece of wood – and don’t care too much about how it will look – then using a spade bit is one of your best options. It allows for boring through the thickest pieces of wood of the three and its also the fastest.
That comes at the cost of the produced hole being very rough, though. You also need to be wary of the fact that your workpiece will likely splinter where the bit exits it.
If you are looking to cut all the way through a piece of wood but are looking for a cleaner finish, then pick a hole saw. While it will take you a bit longer to cut, the finished hole will be much cleaner. Assuming you use a quality hole saw, you should also be able to avoid splintering.
That said, still drill from the “finish side” – and for the cleanest finish, sand the surface of the hole.
Finally, if you need a hole that goes only partially into the wood and doesn’t go all the way through, you should go with a Forstner bit. If used properly – and especially with a drill press – the cut will be the cleanest of the three options, and you will be able to produce a perfect flat-bottom hole.
Available Sizes
While the above should serve as a general guide when choosing among the three, you also have to keep in mind that the size ranges that the three tools are available in differ too.
Forstner bits normally come in sizes ranging from 1/4-inch all the way to 2-1/4-inches. Commonly available spade bit sizes are 1/4-inch to 1-1/2 inches. Finally, with a diameter between 1 inch and 6 inches, hole saws are ideal if you need to make large holes.
Besides the diameter of the hole, the depth of the hole is another property in which the three differ. Spade bits generally go the deepest followed by hole saws and Forstner bits.
Workpiece Materials
Spade bits and Forstner bits are exclusively woodworking tools.
On the other hand, hole saws come in a variety of types. While the most common hole saws can be only used with wood, there are also hole saws made specifically for use with metal – and even masonry.