Wheel Selection

The Model H4378 only accepts Type-1 wheels with a 1Ú2" bore. The Model H4379 only accepts Type-1 wheels with a 5Ú8" bore.

Aluminum oxide and silicon carbide wheels are marked in a somewhat uniform manner by all the major manufacturers. Understanding these mark- ings will help you understand the capabilities of various wheels. Always refer to the manufactur- erÕs grinding recommendations when selecting a wheel for your project.

The basic format for wheel numbering is:

Prefix

Abrasive

Grit

Grade

Bond

 

Type

Size

 

Type

 

 

 

 

 

1

A

60

L

V

 

 

 

 

 

The Prefix is the manufacturerÕs designation for a particular type.

The most common Abrasive Types used are A for Aluminum Oxide and C for Silicon Carbide, and occasionally SG for Seeded Gel.

The Grit Size is a number that refers to the size of the abrasive grain in the wheel. The lower the number, the coarser the wheel. 10 is a very coarse wheel for roughing and 220 is usually the upper range for fine finish work.

Grade is an indication of the hardness of the wheelÑÒAÓ being the softest and ÒZÓ being the hardest.

Bond Type refers to the type of bonding material used to hold the abrasive material. Most general purpose wheels will have a ÒVÓ indicating Vitrified Clay is used. Vitrified Clay provides high strength and good porosity. The other common bond type is ÒBÓ for resin where synthetic resins are used. These are used to grind cemented carbide and ceramic materials.

There may be other numbers inserted that have meaning for a particular type of wheel. Refer to the manufacturerÕs technical data for a complete explanation.

H4378/H4379 Slimline Bench Grinder

-11-

Page 13
Image 13
Grizzly G7298, G7299 instruction manual Wheel Selection, Prefix Abrasive Grit Grade Bond

G7298, G7299 specifications

Grizzly G7299 and G7298 are both remarkable additions to the lineup of woodworking tools designed for professionals and creators. These models stand out due to their robust features and advanced technologies, engineered to enhance the efficiency and precision of various woodworking tasks.

The Grizzly G7299 is a 9" x 19" variable-speed metal cutting bandsaw that offers exceptional versatility. One of its main features is the adjustable blade speed, with options ranging from 80 to 280 FPM, allowing users to tailor the cutting speed according to the material being processed. The powerful 1 HP motor is another highlight, providing ample power for cutting through tough metals with ease. Equally, the G7299 is equipped with an easy-to-read digital display to monitor speed settings, enhancing user control.

For added convenience, the G7299 includes a large cast iron table which provides stability during operation. The table is also adjustable, enabling users to make angled cuts with precision. The built-in work light illuminates the cutting area, ensuring that users can see clearly even in low-light conditions. Safety is a priority with features like a blade guard and a quick-release tension mechanism for easy blade changes.

On the other hand, the Grizzly G7298 brings its own set of advantages as a high-performance 10" table saw. This model features a powerful 2 HP motor and a 30" rip capacity, making it suitable for larger projects. The G7298’s rack and pinion fence system ensures accurate and smooth adjustments, allowing users to achieve precise cuts consistently.

Additionally, the G7298 boasts a sturdy cast iron tabletop, which minimizes vibration and improves stability, thereby enhancing the quality of cuts. The integrated dust collection port helps maintain cleanliness in the workspace, conveniently connecting to most standard shop vacuums.

Both models are built with durability in mind, constructed from high-quality materials suited for heavy-duty use. They appeal to both hobbyists and professional woodworkers alike due to their reliability and performance. The Grizzly G7299 and G7298 are perfect examples of how modern technology and engineering come together to fulfill the needs of today’s woodworking enthusiasts, ensuring that every project is completed with precision and ease.