P20-DM85 SUNNEN Diamond Honing Stone

Review SUNNEN Aftermarket Diamond Honing Stone

The P20-DM85 Sunnen Diamond Honing Stone is a superior tool for achieving precise, long-lasting engine cylinder bore finish. This stone, manufactured by Sunnen Products Company, is renowned for its ability to provide excellent cylinder bore finish for two-stroke and four-stroke diesel and gasoline engines.

The P20-DM85 is a diamond-impregnated honing stone, which means that its surface is embedded with industrial-grade diamonds. These diamonds, when used in conjunction with the recommended honing compound, create an abrasive surface that effectively removes metal from the engine cylinder bore. This process results in a smooth, mirror-like surface that minimizes engine friction, improves engine efficiency, and enhances engine performance.

The diamond particles on the P20-DM85 stone are evenly distributed and carefully graded to ensure consistent honing results. The stone's hardness and durability enable it to last for multiple honing jobs, making it a cost-effective solution for engine reconditioning.

The P20-DM85 Sunnen Diamond Honing Stone is designed to be used with Sunnen's patented honing machines, such as the Model B or Model C machines. These machines facilitate precise control over the honing process, ensuring that the engine cylinder bore is honed to the exact specifications required for optimal engine performance.

When using the P20-DM85 Sunnen Diamond Honing Stone, it is important to follow the recommended procedures and safety guidelines provided by Sunnen. Proper use of the stone, along with the recommended honing compound and honing machine, will result in a superior engine cylinder bore finish that contributes to improved engine performance and longevity.

The P20-DM85 Sunnen Diamond Honing Stone is a popular choice among machinists and mechanics for precision honing of engine cylinders and other components. Here are some pros and cons of purchasing this honing stone:

1. Exceptional cutting ability: The diamond particles in the stone provide excellent cutting ability, enabling quick and efficient honing of cylinders and other components.

2. Long-lasting: Compared to other honing stones, the diamond-impregnated stone lasts much longer, reducing the need for frequent replacement.

3. Consistent finish: The diamond particles create a consistent honing pattern, resulting in a smooth and even finish that improves engine performance and reduces wear.

4. Versatile: The P20-DM85 Sunnen Diamond Honing Stone can be used for various applications, including cylinder honing, crankshaft grinding, and surface finishing.

5. Easy to use: The stone comes with a user-friendly design, making it simple to set up and use, even for beginners.

1. Expensive: The P20-DM85 Sunnen Diamond Honing Stone is more expensive than traditional honing stones, making it a significant investment for some users.

2. Requires careful handling: The diamond particles can be brittle and may chip or crack if not handled carefully, requiring proper storage and handling techniques.

3. Limited availability: The stone may not be readily available at local hardware stores or retailers, making it necessary to order it online or through specialized suppliers.

4. May require additional equipment: To use the P20-DM85 Sunnen Diamond Honing Stone effectively, users may need to invest in additional equipment, such as a honing machine or motor mount.

In conclusion, the P20-DM85 Sunnen Diamond Honing Stone offers exceptional cutting ability, long-lasting performance, and a consistent finish, making it a valuable investment for those seeking precision honing and engine performance improvements. However, its high cost, limited availability, and potential need for additional equipment may be considerations for some potential buyers. Ultimately, the decision to purchase the P20-DM85 Sunnen Diamond Honing Stone will depend on individual needs, budget, and availability. If precision honing is a priority and budget is not a concern, then this stone is an excellent choice. For those on a tighter budget or with limited honing needs, traditional honing stones or alternative methods may be more suitable.

Details:

Part number: P20-DM85. Aftermarket Sunnen P20-DM85 diamond honing stone manufacturer. For more engine rebuilding tools and equipment, used for: any Sunnen mandrel using p20 or ml abrasives.

specifications lightument:

• brand: Sunnen
• mpn: P20-dm85
• country of origin: China

payments lightument:

• other
• credit card: visa
• wallet: paypal

shipping lightument:

• carrier: usps
• class: expedited
• service: usps priority mail flat rate envelope
• type: calculated
• transit: 3-8 days

seller lightument:

• # reviews: 4388
• city: council grove, kansas
• rating: 100.0%

general lightument:

• category: Business & Industrial > Light Equipment Tools

returns lightument:

• policy: returns accepted
• time: 30 days
• method: money back
• paid by: buyer

offer lightument:

• options: ship-to-home
• best offers: true
• sold #: 11
• started: february 3, 2026
• in stock #: 1
• price: $52.00
• item condition: New
• availability: in stock