5GP20-906UC SUNNEN Honing Mandrel

Review SUNNEN Honing Mandrel .900 Inch .931

The Sunnen 5GP20-906UC 5ML-906M Honing Mandrel is a professional-grade tool designed for cylinder honing applications in engines with a 900 or 931 series engine block. This mandrel is manufactured by Sunnen, a well-known and trusted name in the automotive honing industry.

The mandrel is engineered to provide precise and accurate honing results, ensuring optimal engine performance and efficiency. It is specifically designed to fit engines with a 900 or 931 series engine block, making it an essential tool for mechanics and engine builders working on these types of engines.

The 5ML-906M Honing Mandrel features a durable and robust construction, with a hardened and precision-machined mandrel shaft and high-quality bearings. The mandrel is designed to be used with Sunnen's 5-inch (127mm) honing stones, which are available in various grit sizes to accommodate different stages of the honing process.

The mandrel is also equipped with a unique safety feature - a locking collar that secures the honing stone in place during use. This ensures that the stone stays firmly attached to the mandrel, preventing it from coming loose during the honing process and potentially causing damage to the engine or the mandrel itself.

The Sunnen 5GP20-906UC 5ML-906M Honing Mandrel is easy to use and requires minimal setup. It can be used with standard honing machines and is compatible with most popular honing fluid systems. The mandrel is also easy to clean and maintain, with a design that allows for quick and easy access to all components for routine maintenance and upkeep.

In summary, the Sunnen 5GP20-906UC 5ML-906M Honing Mandrel is a high-quality and reliable tool for cylinder honing applications on engines with a 900 or 931 series engine block. Its durable construction, easy-to-use design, and safety features make it an essential tool for any mechanic or engine builder working on these types of engines.

Pros and Cons of Buying Sunnen 5GP20-906UC 5ML-906M Honing Mandrel 900 931

The Sunnen 5GP20-906UC 5ML-906M Honing Mandrel 900 931 is a precision engineering tool designed for crankshaft and connecting rod honing. Here are some potential advantages and disadvantages of investing in this product.

1. High-precision tool: The mandrel is engineered to provide precise honing, which can lead to improved engine performance and longer engine life.

2. Versatile: It is compatible with various engine types, including those with 900 and 931 series blocks.

3. Durable: Made from high-quality materials, this mandrel is built to last and can withstand heavy use in professional workshops.

4. Easy to use: It features a user-friendly design, making it simple for mechanics and engine builders to use effectively.

5. Helps reduce engine wear: The mandrel's honing process helps to evenly distribute the metal filings, which can help reduce engine wear and improve overall engine performance.

1. Price: The Sunnen 5GP20-906UC 5ML-906M Honing Mandrel 900 931 is a premium product, and its price may be a barrier for some buyers.

2. Requires expertise: While the tool itself is relatively easy to use, honing an engine requires a certain level of expertise and experience.

3. Maintenance: Proper maintenance of the tool is essential to ensure it remains in good working condition and continues to provide accurate honing results.

The Sunneng 5GP20-906UC 5ML-906M Honing Mandrel 900 931 is an excellent investment for professional engine builders and mechanics who demand high precision and durability from their tools. Its ability to evenly distribute metal filings during the honing process can lead to improved engine performance and longer engine life. However, its price point may be a deterrent for some, and the tool requires a certain level of expertise to use effectively.

If you are a professional engine builder or mechanic, and you value high-precision tools that can help improve engine performance and longevity, the Sunneng 5GP20-906UC 5ML-906M Honing Mandrel 900 931 is an excellent investment. However, if you are new to engine building or have limited budget, you may want to consider other less expensive honing solutions or seek training to gain the necessary expertise before investing in this high-performance tool.

Details:

The coating shows moderate worn along the stone slot and on shank. Comes equipped with everything needed to hone: stone wedge, tension blocks, new uc-c guide shoes and a aftermarket set of honing stones. Condition: in working used condition. Old part number: 5ML-906M.

Range: .900 - .937 22,86mm 23,80mm. Please review pics. Sunnen 5GP20-906UC / 5ML-906M honing mandrel .900 - .931 , manufacturer. The equipped guide shoes and stones are new.

New part number: 5GP20-906UC. The tension blocks and stone slot are in good working shape with only some superficial dents.the wedge is moderately worn, but still functional.

specifications lightument:

• brand: Sunnen
• mpn: 5gp20-906uc
• country/region of manufacture: United States

offer lightument:

• in stock #: 1
• sold #: 18
• started: september 29, 2025
• options: ship-to-home
• best offers: true
• price: $325.00
• item condition: Used
• availability: in stock

returns lightument:

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

shipping lightument:

• carrier: usps
• service: usps priority mail
• type: calculated
• transit: 3-9 days
• class: expedited

payments lightument:

• wallet: paypal
• other
• credit card: mastercard

general lightument:

• category: Business & Industrial > Light Equipment Tools

seller lightument:

• rating: 100.0%
• # reviews: 4157
• city: council grove, kansas