SUNNEN MM33-J87 Silicon Carbide Finishing Stones 3.3 4.2

( Brand: Sunnen ), ( Manufacturer Part Number: MM33-J87 ), ( Type: Finishing Stones ), ( Country Of Origin: United States )

Review SUNNEN Sunnenmm 33-j87 Grit Silicon carbide Finishing Stones 3.3 Inch To 4.2 Bore fits 400

Introducing the SUNnenMM33-J87 400 grit Silicon Carbide Finishing Stones, a must-have accessory for achieving a flawless finish on a wide range of materials. Designed specifically for use with 3.3 and 4.2-inch angle grinders, these stones are an essential addition to any workshop or toolkit.

The SUNnenMM33-J87 stones are made from premium-quality silicon carbide granules, which are known for their exceptional durability and ability to produce a smooth, polished surface. The 400 grit finishing stone is ideal for removing scratches and imperfections, leaving a mirror-like shine on the material.

Each stone measures 3.3 inches by 4.2 inches, making them a perfect fit for standard angle grinder disc plates. The stones are also thin, with a thickness of only 1/16 inch, which allows for precise control and easy maneuverability during use.

The SUNnenMM33-J87 stones come in a set of two, ensuring that you always have a backup stone on hand for extended projects. The stones are also easy to install, simply place them on the angle grinder plate and secure with the appropriate screws or clamps.

It's important to note that when using these stones, it's recommended to use a steady hand and to apply even pressure to avoid uneven wear or damage to the material being worked on. Also, be sure to keep the stone cool and wet during use to prevent overheating and to extend the life of the stone.

In conclusion, the SUNnenMM33-J87 400 grit Silicon Carbide Finishing Stones are an indispensable tool for achieving a perfect finish on a variety of materials. Their durability, ease of use, and thin design make them a must-have accessory for any serious DIYer or professional tradesperson.

Pros and Cons of Buying Sunnen MM33-J87 400 Grit Silicon Carbide Finishing Stones for 3.3/4.2 Inches

a. Superior Finishing: Sunnen finishing stones provide a superior finish by removing microscopic scratches and imperfections from the surface of the workpiece, resulting in a smoother and more polished appearance.

b. Durability: Silicon carbide abrasive is known for its durability and ability to hold a sharp edge for an extended period, making these stones suitable for heavy-duty use in various applications.

c. Consistent Grain Size: The 400 grit stone offers a consistent grain size, which ensures that the workpiece is evenly and uniformly finished.

d. Wide Applicability: These stones can be used on a variety of materials, including metals, glass, and concrete, making them a versatile addition to any workshop.

a. Requires Flattening: Like all abrasive stones, the Sunnen MM33-J87 400 grit stones need to be flattened regularly to maintain their performance and ensure an even cutting surface. This can be time-consuming and requires additional equipment such as a flattening plate or diamond plate.

b. Limited Sizes: These finishing stones are only available in 3.3 and 4.2 inches sizes, which may not cover all the various sizes of workpieces that require finishing.

c. Harder on Tools: Silicon carbide abrasive is harder on tools compared to other types of abrasives, such as aluminum oxide. This may result in more frequent tool replacement or sharpening.

The Sunnen MM33-J87 400 grit silicon carbide finishing stones offer exceptional finishing capabilities, durability, and wide applicability for various materials. However, they require regular flattening, come in limited sizes, and are harder on tools compared to other types of abrasives.

If you are in need of superior finishing capabilities and are willing to invest the time and effort into maintaining these stones, the Sunnen MM33-J87 400 grit finishing stones are an excellent choice for your workshop. However, if you require a more convenient or cost-effective option, consider exploring other types of finishing stones or abrasives that may better suit your specific needs.

Details:

See my other listings for more Sunnen stones including an unused set like this. Up for sale is a set of lightly used SUNNEN mm 33-J87 400-Grit Silicon-Carbide Finishing Stones 3.3 to 4.2 84 107mm Bore.

part #: mm33j87 price

• $43.63

specifications shopequipm:

• for models: 400
• brand: Sunnen
• mpn: Mm33-j87
• type: Finishing Stones
• country of origin: United States

payments shopequipm:

• other
• wallet: Paypal
• credit card: Discover

offer shopequipm:

• started: January 14, 2026
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0

returns shopequipm:

• policy: No Returns

general shopequipm:

• condition: Used
• Automotive Tools Supplies > Shop Equipment Supplies > Other Shop Equipment

seller shopequipm:

• # reviews: 4150
• rating: 100.0%
• city: Everett, Washington

shipping shopequipm:

• carrier: USPS
• cost: $0.00
• transit: 3-9 Days
• class: Standard
• service: USPS Ground Advantage
• type: Calculated

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