Mounted Vs Unmounted Flap Discs

Flap discs are a popular choice among metalworkers, woodworkers, and DIYers for grinding and finishing a wide range of materials. Flap discs come in two main varieties: mounted and unmounted. In this article, we will explore the differences between mounted and unmounted flap discs.

1. Mounted Flap Discs

Mounted flap discs are typically attached to a backing plate, which allows the flap disc to be used with an angle grinder or other power tool. This type of flap disc is ideal for grinding large, flat surfaces and for reaching into tight spaces and corners. The backing plate provides stability and control, making it easier to achieve a consistent and even finish.

a. Advantages of Mounted Flap Discs

Stability and control: The backing plate provides a stable and controlled platform for grinding, making it easier to achieve a consistent and even finish.

Versatility: Mounted flap discs can be used with a wide range of power tools, including angle grinders, die grinders, and rotary tools, making them a versatile choice for grinding and finishing a variety of materials.

Ease of use: Mounted flap discs are typically easy to use and install, simply requiring the user to attach the flap disc to the backing plate and then mount the plate to the tool.

b. Disadvantages of Mounted Flap Discs

Limited size options: Mounted flap discs come in a limited range of sizes, making it difficult to find the right size for your specific needs.

Higher cost: Mounted flap discs are typically more expensive than unmounted flap discs due to the additional components required, such as the backing plate and mounting hardware.

2. Unmounted Flap Discs

Unmounted flap discs are not attached to a backing plate, and are typically used with a mandrel or arbor for mounting to a power tool. This type of flap disc is ideal for grinding and finishing small or intricate parts, as well as for reaching into tight spaces and corners.

a. Advantages of Unmounted Flap Discs

Wide range of sizes: Unmounted flap discs come in a wide range of sizes, making it easy to find the right size for your specific needs.

Lower cost: Unmounted flap discs are typically less expensive than mounted flap discs, as they do not require a backing plate or mounting hardware.

Increased flexibility: Unmounted flap discs can be used with a variety of mandrels and arbors, allowing for greater flexibility in terms of the types of power tools that can be used with the disc.

b. Disadvantages of Unmounted Flap Discs

Less stability: Without a backing plate, unmounted flap discs can be more difficult to control and provide a less stable platform for grinding.

Increased setup time: Unmounted flap discs require additional setup time, as the user must mount the disc to the mandrel or arbor before using it.

In conclusion, mounted and unmounted flap discs each have their own advantages and disadvantages, and the choice between the two will depend on the specific needs of the user.