The BRM GBD50012 Flex-Hone® is a professional-grade cylinder surface finishing tool engineered for 4.50 inch to 5.00 inch bores and equipped with 120-grit Silicon Carbide (120SC) abrasive. Designed for precision deglazing, plateau honing, and surface conditioning, this Flex-Hone prepares cylinder walls for optimal piston ring seating during engine rebuilds and maintenance.
BRM’s patented flexible abrasive globule design allows the hone to conform to the true bore geometry, maintaining roundness while creating a consistent, oil-retaining crosshatch finish. Unlike rigid hones, the Flex-Hone minimizes the risk of taper or out-of-round conditions and delivers a controlled surface texture that improves ring seal, oil control, and reduces break-in time. The 120SC grit offers an ideal balance of light material removal and surface refinement, making it suitable for cast iron and steel cylinder walls commonly found in automotive, heavy-duty diesel, industrial, and performance engines.
The GBD50012 is trusted by professional engine builders, machine shops, and fleet maintenance facilities worldwide. For best results and extended tool life, it is intended for use with low-speed drills and appropriate honing oil.
Key Features & Benefits
-
Bore Range: 4.50" to 5.00" diameter
-
Abrasive Type: 120-grit Silicon Carbide (120SC)
-
Produces a uniform, controlled crosshatch pattern
-
Ideal for cylinder deglazing and plateau honing
-
Flexible globule design conforms to bore geometry without taper or distortion
-
Enhances piston ring seating and oil retention
-
Reduces engine break-in time
-
Suitable for cast iron and steel cylinder liners
-
Professional-grade BRM Flex-Hone® quality
Applications
-
Engine cylinder deglazing and surface finishing
-
Piston ring replacement and engine rebuilds
-
Automotive, heavy-duty diesel, industrial, and performance engines
-
Engine builders, machine shops, and fleet maintenance facilities
While these go by many names dingleberry hone, dingle ball hone; ball
hone, flexhone and dingleberry brush Flex-Hone is the correct name.
The BRM GBD50012 Flex-Hone® is a professional-grade cylinder surface finishing tool engineered for 4.50 inch to 5.00 inch bores and equipped with 120-grit Silicon Carbide (120SC) abrasive. Designed for precision deglazing, plateau honing, and surface conditioning, this Flex-Hone prepares cylinder walls for optimal piston ring seating during engine rebuilds and maintenance.
BRM’s patented flexible abrasive globule design allows the hone to conform to the true bore geometry, maintaining roundness while creating a consistent, oil-retaining crosshatch finish. Unlike rigid hones, the Flex-Hone minimizes the risk of taper or out-of-round conditions and delivers a controlled surface texture that improves ring seal, oil control, and reduces break-in time. The 120SC grit offers an ideal balance of light material removal and surface refinement, making it suitable for cast iron and steel cylinder walls commonly found in automotive, heavy-duty diesel, industrial, and performance engines.
The GBD50012 is trusted by professional engine builders, machine shops, and fleet maintenance facilities worldwide. For best results and extended tool life, it is intended for use with low-speed drills and appropriate honing oil.
Key Features & Benefits
-
Bore Range: 4.50" to 5.00" diameter
-
Abrasive Type: 120-grit Silicon Carbide (120SC)
-
Produces a uniform, controlled crosshatch pattern
-
Ideal for cylinder deglazing and plateau honing
-
Flexible globule design conforms to bore geometry without taper or distortion
-
Enhances piston ring seating and oil retention
-
Reduces engine break-in time
-
Suitable for cast iron and steel cylinder liners
-
Professional-grade BRM Flex-Hone® quality
Applications
-
Engine cylinder deglazing and surface finishing
-
Piston ring replacement and engine rebuilds
-
Automotive, heavy-duty diesel, industrial, and performance engines
-
Engine builders, machine shops, and fleet maintenance facilities
