4.5 sali cutting disc

Product Description

A 4.5 inch metal cutting disc is a standard abrasive accessory for angle grinders. It is designed specifically for the rapid cutting of metal workpieces such as pipes, rods, sheet metal, and profiles.

Also known as a cut-off wheel, this disc features a thin profile, typically between 1.0mm and 1.6mm. This minimizes material loss and reduces friction for a faster, cleaner cut.

The Type 41 flat design ensures stability during high-speed operation. It produces smooth, burr-free edges suitable for both professional workshops and DIY home use.

What Materials Are Compatible with this Disc?

A common question is its compatibility with various metals.

4.5 sali cutting disc

The 4.5 inch standard cutting disc is primarily engineered for carbon steel and stainless steel. It is highly effective on solid pipes, rods, angle iron, and thin gauge sheet metal.

While some general-purpose discs may handle non-ferrous metals, a specialised diamond or aluminium oxide disc is often recommended for aluminium or brass to prevent wheel loading.

What are the Standard Specifications?

The diameter is 115 mm, fitting common small angle grinders. The thickness is typically 1.2 mm, a thin kerf for fast cutting, ranging from 1.0 to 1.6mm.

The arbor hole is 22.23 mm, a standard fit for most angle grinders. The maximum RPM is 13,300 RPM, a safety rating that should not be exceeded. The speed rating is 80 m/s peripheral speed.

How Do You Install and Use the Disc Safely?

To install a 4.5 inch cutting disc, first unplug your angle grinder. Place the disc onto the spindle, ensuring it fits over the arbor. The printed side of the disc usually faces outward.

Tighten the flange nut firmly with the pin wrench. Always use the proper wheel guard for cut-off wheels and wear appropriate personal protective equipment.

Never exceed the maximum RPM rating of the disc. Cut in a straight line with light to moderate pressure, allowing the tool to do the work.

4.5 sali cutting disc

What Types of Cutting Discs Are Available?

For general steel cutting, the standard abrasive cutting disc made of aluminium oxide is the most common and economical choice.

For stainless steel, specialised discs use harder abrasives to prevent glazing and overheating.

For materials like stone, tile, or concrete, a diamond cutting disc is required. This is structurally different from abrasive metal wheels.

Why are Some Discs Marked as “Thin Kerf”?

“Thin kerf” refers to a disc thickness of 1.2mm or less.

A thinner disc removes less material, generates less heat, and requires less power from the grinder. This results in a faster cut. However, thin discs are more fragile against side pressure.

Thicker discs of 1.6mm offer more durability and impact resistance for heavy-duty rough cutting.

How Do You Choose the Right Disc?

The choice depends on the material being cut.

Use a standard metal cutting disc for general steel. Use a stainless steel cutting disc for stainless steel to prevent heat discolouration. Use a diamond disc for stone, brick, or concrete.

Always match the disc material to the workpiece material.