Mornajina 4.5in Glass Cutting Disc 5-Pack - Thin, Accurate Cuts

In this review of the Mornajina 4.5in Glass Cutting Disc 5-pack the bottom line is simple: this set is for hobbyists and professionals who need a thin, durable blade for clean glass and tile work. The reviewer found the discs deliver noticeably straighter, low-debris cuts thanks to the 0.04in ultra-thin diamond edge and upgraded brazing process, making them well suited for projects like bottle cutting, tile trimming, and stone or jade shaping where controlled, chip-free results matter.

Key Features

• Ultra-thin 0.04in edge: The 1mm thickness gives precise, straighter cuts and reduces material loss on fragile workpieces.
• Diamond high manganese steel matrix: The upgraded brazing produces a hard, wear-resistant rim that stays sharp longer under repeated use.
• Dry and wet cutting: Usable in both dry and wet conditions so users can choose speed or extended blade life depending on the job.
• Low dust and noise: The thin design and uniform grinding force reduce grinding noise and airborne debris for cleaner workspaces.
• Wide material compatibility: Cuts and grinds glass, ceramic tile, jade, crystal and wine bottles for versatile workshop and craft applications.

Who It's For

The Mornajina disc set suits glassworkers, tile installers, and DIYers who use 4.5in (115/125 model) angle grinders and need accurate, chip-free cutting on delicate materials. It is especially useful for people who value clean edges when working with glass, bottles, ceramics or small stone pieces.

Those who require heavy-duty metal cutting, high-thickness masonry work, or specialized blades for steel should look elsewhere, since these ultra-thin diamond discs are optimized for glass, tile, and similar brittle materials rather than thick metal cutting.

Pros & Cons

Pros

• Very clean, chip-free cuts on glass and tile thanks to the ultra-thin 1mm rim.
• Durable construction with a diamond high manganese steel matrix that sustains cutting performance.
• Versatile for both dry and wet use, allowing faster dry work or extended life with water cooling.
• Users reported the wheels cut smoothly, with one noting they slice like a hot knife through butter.

Cons

• Not intended for heavy structural metal cutting, so performance is limited to brittle and ceramic materials.
• The thin rim may require careful handling to avoid chipping if incorrectly used at the wrong angle.

Specifications

Diameter	4.5in (115mm)
Thickness	0.04in (1mm)
Arbor / Inner hole	0.87in (22mm)
Compatible grinder models	115 / 125 model 4.5in angle grinders
Material focus	Glass, ceramic tile, jade, crystal, wine bottles
Cutting modes	Dry cutting and wet cutting supported

Our Verdict

The Mornajina 4.5in Glass Cutting Disc 5-pack is a practical, cost-effective choice for anyone cutting glass, tile or similar brittle materials with a 4.5in angle grinder. Its ultra-thin, diamond-reinforced rim yields accurate, low-debris cuts and holds up well under continued use, making it good value for hobbyists and trade users who need cleaner edges without frequent blade swaps.

Frequently Asked Questions

Can these discs be used wet?
Yes. They are designed for both dry and wet cutting; wet cutting will extend blade life and reduce dust.

Will these cut metal or steel?
No. They are optimized for glass, ceramics, jade and similar brittle materials and are not intended for heavy metal cutting.

Which angle grinder models fit this disc?
The discs fit standard 4.5in (115/125 model) angle grinders with a 22mm inner hole.