Diamond Glass Cutting Disc 4.5in 3pcs - Thin Fast Straight Cuts

In this review the Diamond Glass Cutting Disc 4.5in 3pcs is assessed for hobbyists and trade users who cut glass, jade, crystal or wine bottles and need a thin, fast blade that stays true. The reviewer found the set useful because the super thin 1.5mm diamond segments with #100/120 grit deliver clean, controlled cuts with less chipping, and the vacuum brazed diamond on a steel substrate promises longer life than lower quality alternatives. This review focuses on practical performance, recommended machines and when to use water for best results.

Key Features

• Diameter and fit: The 4.5in (115mm) diameter and 7/8in bore with a 7/8in-5/8in washer make these blades compatible with common angle grinders and masonry saws.
• Thin profile: The 1.5mm thickness and thin segment design allow fast, straight cuts and reduced material loss on delicate pieces like glass and crystal.
• Durable segments: Diamond height of 15mm and vacuum brazed construction increase wear resistance and tolerate higher temperatures during continuous cutting.
• Versatile grit: The #100/120 diamond grit balances cutting speed and surface finish, suitable for both cutting and light grinding of tile, marble, jade and bottles.
• Dry or wet use: The blade is suitable for dry and wet cutting, and using water reduces chipping when working with thin or brittle materials.
• Recommended speeds: Intended for angle grinders at around 8000RPM and safe to a maximum of 13200RPM to avoid overspeed risks.

Who It's For

These diamond discs are aimed at DIYers, craft makers and tradespeople who need a compact blade for an angle grinder or masonry saw to shape glass, stone and similar brittle materials. The thin 1.5mm profile is particularly useful when conserving material and achieving straighter cuts on bottles, tile edges and small marble pieces.

Those who should look elsewhere include heavy demolition or production shops that need very wide, high-volume blades for prolonged cutting of thick stone; for those tasks a full-size masonry blade or continuous rimblade made specifically for heavy stone work is more appropriate.

Pros & Cons

Pros

• Thin 1.5mm blade cuts fast and straight with fewer chips on glass and crystal.
• Vacuum brazed diamond on steel substrate improves life and tolerates higher temperatures during continuous cutting.
• Versatile use for dry or wet cutting across glass, jade, marble, tile and bottles.
• Includes washer option to fit common grinder arbors for easy mounting.

Cons

• Not intended for heavy production stone cutting or very thick material where a larger blade would be more efficient.
• Requires attention to recommended speed limits and water use to avoid chipping or overheating in some applications.

Specifications

Diameter	4.5in (115mm)
Bore	7/8in (22.23mm) with 7/8in-5/8in washer (15.875mm)
Diamond grit	#100/120
Diamond segment height	15mm
Thickness	1.5mm
Recommended machine	Angle grinder, masonry saw
Recommended speed	8000RPM (max 13200RPM)

Our Verdict

The Diamond Glass Cutting Disc 4.5in 3pcs is a practical, value-minded choice for hobbyists and light trade work that requires thin, accurate cuts in glass, jade, tiles and bottles. Its vacuum brazed diamond segments and thin 1.5mm profile deliver cleaner edges and longer life than generic blades, making it a good buy for anyone using an angle grinder or masonry saw at the recommended speeds.

Frequently Asked Questions

Can these blades be used wet?
Yes. The discs support wet cutting which helps reduce chipping and heat when working with glass and brittle materials.

Will they fit my angle grinder?
The blades have a 7/8in bore and include a 7/8in-5/8in washer to fit common grinder arbors; confirm your tool arbor size before mounting.

Are these suitable for heavy stone cutting?
They are best for glass, tile, marble and light stone work; for heavy, continuous stone cutting a larger, dedicated masonry blade is preferable.