SECTION 5: Operations

Overview

Use extreme caution when sharpening any type of knife, both during and after sharp- ening. Make certain the knife is fully sup- ported by the rest before bringing it into contact with the wheel. Failure to exercise care while working near knives could result in severe injury.

The dry wheel supplied with the G8220 is an 80 grit Aluminum Oxide wheel good for heavy mate- rial removal and for roughing in to approximate dimensions. The wet wheel is a very fine 1000 grit which, along with the water supply, allows fine grinding and honing to very precise edges. Choose the wheel and grinding method appro- priate for your grinding needs.

Wet Wheel Grinding

There are three adjustments necessary to get the proper grinding angle. Tool rest height, tool rest angle, and miter gauge angle must all be adjust- ed to get the proper angle of attack on the grind- ing wheel. Be sure the machine is off and unplugged. Lay the item to be ground on the rest and lay it against the stationary wheel. Adjust all three elements until the blade contacts the wheel in the proper orientation. A typical set up for a bevel tip chisel is shown in Figure 6.

The water reservoir allows the operator to drip water onto the wheel during the grinding process. The water serves two purposes. One is to provide a certain amount of cooling for the heat which is

Figure 6. Typical wet wheel grinding operation.

naturally generated during the grinding process. Secondly, the water acts as a lubricant for the grinding process improving the cutting character- istics of the fine grit wheel. As you begin grinding, adjust the water flow so there is a steady drip onto the surface of the wheel, close to the inner edge. Make sure the drain pipe coming out the underside of the water tray is directed so it is going into some type of container.

Plug the machine in and turn the motor on. Allow the wheel to get up to full operating speed before beginning the grind. Introduce the item to the wheel slowly and carefully, making sure it is fully supported against the tool rest and miter gauge. For some types of grinds, it may be necessary to sweep the item across the wheel surface by slid- ing the tool rest across the holder. Always lift the item off the surface when returning to the starting point of the sweep. Do not let the workpiece get too hot during grinding. If heat is increasing, slow down the rate of grind, or turn up the water flow. High heat will destroy the temper of the metal and will make it impossible to hold an edge.

G8220 Wet/Dry Bench Grinder

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Grizzly G8220 instruction manual Overview, Wet Wheel Grinding
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G8220 specifications

The Grizzly G8220 is a versatile tool that stands out in the woodworking and metalworking landscape, offering a blend of power, precision, and user-friendly features. This machine is primarily designed as a combination belt and disk sander, making it an asset for both hobbyists and professional artisans alike.

One of the key features of the Grizzly G8220 is its robust 1 HP motor, which provides ample power to handle a variety of sanding tasks. With a belt speed of 1,725 RPM and a disc speed of 3,600 RPM, this tool allows users to achieve smooth finishes on a range of materials, from hardwoods to softer metals. This ability to adjust sanding speeds not only enhances versatility but also ensures efficiency in the sanding process.

The Grizzly G8220 boasts a sizable sanding surface, including a 4-inch by 36-inch sanding belt and a 8-inch disc. This generous area facilitates larger workpieces and reduces the number of passes needed to achieve desired results. Additionally, the tilting table of the disc sander can be adjusted from 0 to 45 degrees, enabling bevel sanding for more complex projects.

Incorporating user safety as a priority, the G8220 includes features such as an integrated dust port that connects easily to dust collection systems. This helps keep the work area clean by minimizing debris and maintaining air quality. The machine's heavy-duty cast iron construction not only provides stability during operation but also contributes to reduced vibrations, resulting in a smoother sanding experience.

The machine is designed for ease of use and maintenance. The belt can be adjusted without tools, allowing for quick changes and maintenance. The onboard storage for tools enhances convenience, ensuring that everything needed is within reach.

Technologically advanced, the Grizzly G8220 supports a variety of sanding applications, including contour sanding and straight-edge sanding. It offers an excellent balance of power and precision that is ideal for both detailed intricate work and brute sanding tasks.

In summary, the Grizzly G8220 is an exceptional combination sander that delivers excellent performance and flexibility. Its powerful motor, generous sanding surfaces, and user-friendly features make it a reliable choice for woodworking professionals and enthusiasts, allowing them to tackle a wide range of projects with ease and effectiveness. Whether working on intricate designs or large-scale products, the Grizzly G8220 stands out as a must-have tool in any workshop.
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