Wednesday, March 13, 2013

The Right Table Saw for Your Shop


Buying a table saw is one of the most important investments a woodworker can make. If your in the market for your first saw or ready to step up to a better model, keep reading. We'll bring you up to speed on table saw types and classes, what to look for in any table saw, and how to choose a model that suits your woodworking style and budget.

Types of Table Saw

The table saws available on the market today almost all fall under one of the following classifications: portable or "jobsite" saws, contractor saws, hybrid saws and cabinet saws. If you're shopping for a new saw, the first things you'll need to know is what the classifications mean, and what you can expect from saws in each class.

Portable Table Saws

Portable table saws are designed to be easy to lift and move around, making them great for carpenters and others who spend most of their time on the job site. Portable table saws perform the same basic function as larger table saws, but on a smaller scale. Instead of the hefty induction motor that you'll find on saws in the other classes, they use a lightweight universal motor, and because of that, tend to be a little short on muscle and also fairly loud. As another concession to portability, most portable saws have an aluminum top, instead of cast iron. The aluminum top and less torquey universal motor are not necessarily "problems" but they are definitely less durable and also mean that the saw will produce more vibration and feel less stable to operate.
bosch portable table sawImprovements in recent years to "jobsite" saws have made them more viable for woodworkers, and better than ever for carpentry tasks. The Bosch 4100 Portable Saw you see here, with its 15 amp universal motor and 25" rip capacity offers enough power for most common ripping jobs and reasonable capacity for cutting sheet materials. Still, portable saws lack the power to rip thick hardwoods and aren't really designed to provide the accuracy that fine woodworking demands. Since contractor, hybrid, and cabinet saws represent more realistic choices for professional woodworkers and serious hobbyists, we'll consider them in more detail below.
powermatic model a4 table saw

The Powermatic Model 64B is a "classic" contractor saw with high-end features, including an Accu Fence rail and fence system and cast iron extension wings.

Contractor Saws

Contractor saws were originally designed to be portable enough to haul from jobsite to jobsite. These open-based table saws are characterized by a straightforward design and an affordable price. Contractor saws are relatively lightweight (in the 250 - 350 lb. range) usually priced within the reach of the hobbyist and homeowner and until recently, have been virtually the only option for the small shop.
Contractor saws do make a few concessions in the name of affordability and portability. Although most contractor saws have a solid cast iron table top, the extension wings may be made of "open webbed" cast iron or stamped metal. The trunnions, gearing and arbor assembly of a contractor saw are less husky than those found on more expensive saws. The contractor saw's motor hangs off of the back of the saw - a feature originally meant to make the motor easier to remove for transport - and is most often connected to the arbor assembly via a single V-belt.
Contractor saws are still the most affordable solution for the home shop, and are suitable for carpentry, small cabinetry projects, trim work, and basic furniture making. Many contractor saws now come with high quality fence systems. Using the best quality saw blade - and using blades designed for a specific type of cut - can enhance the performance of a contractor saw and bring it up to speed for many more advanced woodworking projects. Buying a contractor saw that's equipped with solid cast iron extension wings will increase the stability of the saw, and help reduce the impact of vibration on the saw's less substantial trunnions and gearing.
powermatic pm2000 table saw

Cabinet saws offer performance and durability the put them in a class by themselves. The Powermatic PM2000 pictured above comes standard with everything you'd expect from a professional-class saw.

Cabinet Saws

Cabinet saws - so called because of the fully enclosed "cabinet" style base - represent the other end of the spectrum from the contractor saw. Cabinet saws are designed to meet the performance and durability needs of professional woodworkers. Cabinet saws are more substantial in overall construction than contractor saws - they're built using more cast iron and steel, have heavier trunnions, gearing, and arbor assemblies, and more powerful motors than their contractor saw counterparts. The cumulative result is a saw that can cut through even the thickest hardwood stock easily, all day long, with very little vibration to wear on either the saws alignment and settings or the operator's nerves.
A number of features set the cabinet saw apart. The motor is enclosed inside the cabinet base, making it a quieter saw, and the fully enclosed base has the advantage of making dust collection easier. The motor and arbor assembly are held in place with heavy-duty trunnions that attach to the cabinet base (instead of the table) which makes bringing the saw blade into alignment with the miter slot and fence much easier. As a rule, cabinet saw are manufactured to more exacting standards than less expensive saws: their tables are flatter, their bearings and pulleys heavier and more robust, and most often, they're equipped with a more reliable fence system.
A good quality cabinet saw is more of an investment than a contractor saw. And because cabinet saws use more powerful motors (3 -5 HP as opposed to 1 - 1-3/4 HP for contractor and hybrid saws) they require a 220 volt circuit for operation. They are by no means portable - a full sized cabinet saw weighs in at upwards of 600 lbs. But even with the greater expense, the electrical power requirements, and the physical heft of the machine, cabinets saws are still the preferred saw of professional woodworkers and serious amateurs alike due to their superior performance.
Jet jwss supersaw

Hybrid saws, like the Jet ProShop pictured here, combine affordability with cabinet saw features, including a fully enclosed base and heavier trunnions and gearing and more advanced drive belt systems.

Hybrid Saws

In recent years, tool manufacturers have begun to recognize the gulf between affordable contractor saws and professional-class cabinet saws. The result has been a new class of table saw. "Hybrid" table saws capture some of the most valuable cabinet saw features at a price that's still in range for the hobbyist.
Some hybrid saws have a cabinet saw-style base while others have a shorter enclosed base and legs. In either case, the base is fully enclosed, with the motor mounted inside. Hybrid saws are equipped with more substantial trunnions and arbor bearings, often a more advanced drive belt system, and better gearing than most contractor saws. In addition, the trunnions of many hybrid saws are mounted to the base of the saw, making precision alignment of the blade with the miter slot and the blade much easier.
Hybrid saws are essentially a scaled down version of the cabinet saw. They're lighter weight, and are equipped with motors in the 1-1/2 - 1-3/4 HP range (which means that they can be used with standard 110 volt service). Many believe that hybrid saws represent the wave of the future for home shops. They're not quite in the same class as their larger cousins, but hybrids are sturdy and well constructed and offer many advantages for the serious hobbyist.

Choosing the Right Saw for Your Shop

The type of saw to consider for your shop depends on the type of woodworking you do, the amount of time you spend woodworking, your budget and, in part, the space and type of access your shop affords (you should think twice, for example, before committing yourself to moving a full scale cabinet saw into a small basement shop).

The Delta UNISAW - a top performer and a top choice of professionals and dedicated hobbyists for years.
If you spend only a few hours a week in your shop, mostly making small cabinetry and craft projects, a cabinet saw might be nice to have, but a little more than you need. On the other hand, if you operate a small professional shop, and are looking for a saw that you can comfortably and reliably run for hours at a time, a low end contractor model will probably slow you down and end up being a disappointment. Hybrid saws offer a good middle ground for serious hobbyists, and will even prove suitable for certain small-scale professional operations. Jet Tools offers a surprising breadth of advanced features in its line of affordable "Supersaws."
As important as the type of saw you choose are the individual features of the saw. Some affordable contractor model saws offer many of the same features that you'd expect to find on a top-quality cabinet saw, such as the widely respected Accu-Fence system and precision ground cast iron table tops and extension wings you'll find on Powermatic contractor models. By the same token, while saws in the cabinet saw class all share certain features - a 3HP or larger motor, trunnions that attach to the base, and heavier construction - they are not all manufactured to the same standards. Take a close look at the quality of all of the saw's components, including the quality of the fence system, the mass and stance of the trunnions, the grind and finish of the top and extension wings, and features that make power transmission to the blade more efficient.

Table saw technology continues it's advance in the SawStop brand. New safety features in this contractor model greatly reduce the potential for injury without bumping up the price beyand the reach of hobbyists (learn more).
Buying a table saw is a big investment, and worth careful consideration. You may not be able to "test drive" every table saw on your list, but you can read reviews, compare specs and features, and it doesn't hurt to take the manufacturers reputation into account. When you're ready to buy your new dream table saw, Rockler offers a wide variety of contractor sawshybrid saws and cabinet saws from the most trusted brands in the business.

Table Saw

Table Saw
Parts of a Table Saw
(c) 2006 Chris Baylor licensed to About.com, Inc.
The Table Saw is undoubtedly the most versatile machine in any shop, and should be the woodworker's first machine purchase. A good table saw becomes the centerpiece of the workshop, as the woodworker uses it to rip, square, miter, groove, shape and join pieces. A quality table saw will make completing nearly any woodworking project easier.

Table Saw Features:

Every table saw should have a smooth, heavy work surface, a handle for raising and lowering the saw blade, a separate handle for adjusting the angle of the blade and connections for dust collection. The saw should have a strong motor that starts smoothly with little vibration and enough horsepower to make deep cuts through harder woods.

Safety Equipment:

Every table saw should include a blade guard, to protect the woodworker from the exposed saw blade, and a large, easily accessible on/off switch. Most modern table saws utilize a large paddle switch that is pulled to turn on the saw, and pushed to turn it off. As such, when the woodworker's hands are busy steadying the material being cut, they can turn the saw off merely pressing their knee against the switch.

Rip Fence:

Perhaps the most important feature to look for when researching which table saw to buy is the fence. A quality fence should be consistently parallel to the saw blade, and have fine tuning controls for when the fence needs adjustment. Most larger table saws have a Biesemeyer-style fence that is sturdy enough for ripping large stock very smoothly and is strong enough to let the woodworker securely clamp a sacrificial strip or featherboard to the fence.

Miter Gauge:

Most table saws include a miter gauge for making angled crosscuts. Better quality saws will utilize a T-groove in the saw's table to help keep the miter gauge from coming out of the groove when in use. The miter gauge should glide smoothly without feeling loose and the be clearly marked for setting the proper cutting angle.

Options:

A number of additional tools and jigs are available for the table saw, including tenoning jigs, stacked dado cutting sets, tapering jigs, panel-cutting jigs and sliding tables. These accessories all can be used to make the table saw the one machine tool that no workshop should be without.

Wood Working Solutions


A table saw or sawbench is a woodworking tool consisting of a circular saw blade, mounted on an arbor, that is driven by an electric motor (either directly, by belt, or by gears). The blade protrudes through the surface of a table, which provides support for the material, usually wood, being cut. In a modern table saw, the depth of the cut is varied by moving the blade up and down: the higher the blade protrudes above the table, the deeper the cut that is made in the material. In some early table saws, the blade and arbor were fixed, and the table was moved up and down to expose more or less of the blade. The angle of cut is controlled by adjusting the angle of blade. Some earlier saws angled the table to control the cut angle. Contents [hide] 1 Types of table saws 1.1 Benchtop table saws 1.2 Contractor table saws 1.3 Cabinet table saws 1.4 Hybrid table saws 2 History 3 Safety practices 3.1 Avoiding kickback 4 Optional safety features 4.1 Magnetic featherboard 4.2 Automatic braking 5 Blade height 6 Accessories 7 References 8 Further reading [edit]Types of table saws A rudimentary table saw There are four general classes of table saws: benchtop table saws, contractor table saws, cabinet table saws and hybrid table saws. [edit]Benchtop table saws Benchtop table saws, sometimes known as job-site saws,[1] are lightweight and are designed to be placed on a table or other support for operation. They commonly have direct drive (no v-belt or pulleys) from a universal type motor. They can be lifted by one person and carried to the job location. These saws often have parts made of steel, aluminum and plastic and are designed to be compact and light. Benchtop table saws are the least expensive and least capable of the three major types; however, they can offer adequate capacity and precision for many tasks. The universal motor is not as durable or as quiet as a brushless AC motor, but it offers more power relative to its size and weight. The top of a benchtop table saw is narrower than those of the contractors and cabinet saws, so the width of stock that can be ripped is reduced. Another restriction results from the top being smaller from the front of the tabletop to the rear. This results in a shorter rip fence, which makes it harder to make a clean, straight cut when ripping. Also, there is less distance from the front edge of the tabletop to the blade, which makes cross cutting stock using a mitre more difficult (the mitre and/or stock may not be fully supported by the table in front of the blade). Benchtop saws are the smallest type of table saw and have the least mass, potentially resulting in increased vibration during a cut. [edit]Contractor table saws Contractor table saws are heavier, larger and have an attached stand or base, often with wheels. The motor either is "direct drive" to the blade (drives the blade directly without a belt) or hinges off the rear of the saw and drives the blade via one, or occasionally two, belts using a 1 to 2 hp (750 to 1500 W) induction type motor. This is the type often used by hobbyists and homeowners because standard electrical circuits provide adequate power to run it, and due to its low cost. Because the motor sometimes hangs off the rear of the saw on a pivot, dust collection can be problematic in comparison with a cabinet saw. [edit]Cabinet table saws Cabinet table saws are heavy (using large amounts of cast iron and steel) to minimize vibration and increase accuracy. A cabinet saw is characterized by having a closed (cabinet) base. Cabinet saws usually have induction motors in the 3 to 5 hp (2 to 4 kW) range. For home use, this type of motor typically requires that a heavy-duty circuit be installed (in the US, this requires a 220V outlet). The motor is enclosed within the cabinet and drives the blade with three parallel v-belts. Cabinet saws are heavier and offer the following advantages over contractor saws: heavier construction for lower vibration and increased durability; a cabinet-mounted trunnion (the mechanism that incorporates the saw blade mount and allows for height and tilt adjustment); improved dust collection due to the totally enclosed cabinet and common incorporation of a dust collection port. In general, cabinet-mounted trunnions are easier to adjust than table-mounted trunnions. The American-style cabinet saws generally follow the model of the Delta Unisaw, a design that has evolved since 1939.[citation needed] Saws of this general type are made in the USA, Canada and China. These saws are characterized by a cast iron top on a full-length steel base, square in section, with radiussed corners. Two 3/8" deep by 3/4" wide miter slots are located parallel to the blade, one to the left of the blade and one to the right. The most common type of rip fence mounted to this type of saw is characterized by the standard model made by Biesemeyer. It has a sturdy, steel T-type fence mounted to a steel rail at the front of the saw. It has replaceable laminate faces. American cabinet saws are normally designed to accept a 13/16" wide stacked dado blade in addition to a standard saw blade. The most common size of blade capacity is 10" in diameter. The blade arbor has a diameter of 5/8". American saws normally include an anti-kickback device that incorporates a splitter, toothed anti-kickback pawls and a clear plastic blade cover. American style saws have an easily replaceable insert around the blade in the table top. This allows the use of zero-clearance inserts, which greatly reduce tear out on the bottom of the workpiece. It is common for this type of saw to be equipped with a table extension that increases ripping capacity for sheet goods. American style table saws are commonly available with the option of left or right tilt blade capability. While relatively simple in design, these saws are highly evolved and capable of efficient and precision work. European-style cabinet saws are often more complex and modern in design compared to American types. They often are equipped with a sliding table to make cross cuts easier and safer than by the use of an American style mitre gauge. Unless modified for the American market, European table saws are not equipped to allow the use of a stacked dado blade set (this is due to safety laws in European markets). Rip fences on European saws tend to be of lighter construction and less smooth in operation compared to American cabinet saws. European cabinet saws are often available in multi-purpose tool configurations that can offer jointer, planer, shaper or boring features. The blade arbor typically has a diameter of 30mm, though for the American market a 5/8" arbor is commonly available as an option. Note that American woodworkers are likely to use a stacked dado blade to cut dados (square sectioned grooves) where European woodworkers might use a shaper or other tool for this task. European cabinet saws often incorporate a riving knife to prevent kickback. Riving knives differ from American style splitters in that they rise and fall with the blade (splitters are fixed in place without regard for the height that the blade is adjusted to). European cabinet saws often offer as an option a scoring blade, which is a second, smaller diameter blade mounted in front of the regular saw blade. The scoring blade helps reduce splintering in certain types of stock, especially laminated stock

Friday, March 8, 2013

Table Saw

working knowledge of the products. Many people go looking for table saws on the Web, only to find themselves quickly overwhelmed by a surfeit of unfamiliar terminology and power ratings. A simple guide can help you make wiser choices when selecting a table saw. The makeup of a table saw has not changed much in decades. Generally it consists of an arbor, or mount, the saw itself, and a motor to power the whole operation. The major varieties are known as bench top saws, cabinet saws, contractor saws and hybrids. With few exceptions, most of the modern versions fall cleanly into these categories, so determining which one you need can save you considerable time at the store.Bench top table saws tend to be lightweight and portable--fit for one person to carry and use without difficulty. If you are into cutting heavy lumber or major furniture parts, you may want to invest in something a little more substantial. Most home users looking for serious reliability favor cabinet table saws for their unsurpassed power and versatility.The best cabinet saws offer rip fences with replaceable facing, anti-kickback devices and table extensions for projects that exceed the dimensions of your arbor. Many require a heavy circuit installation to cover all that extra power, so it may be worth thinking twice before you commit to such permanent home repair. That said, once in place, it is not unusual for such machines to run for ten years or more without requiring serious maintenance. Delta, Dewalt, and Ryobi are leading table saw manufacturers who offer quality products.