Wish one is best for a cylinder wall that is 75mm (2.95 inch) ?

For the cylinder wall bore size of 2.95", the 3" Flex-Hone is the correct choice., Enter this ASIN # B002N3AA2A in the Amazon search bar for the correct hone.

Hello, my cylinder bore is 3 1/8" what size tool do i need to purchase thank you.

For a 3.125" bore, your application will require the 3-1/4" (3.250") diameter Flex-hone. The 3-1/4" will work perfectly in the 3-1/8" bore as the 3-1/4" Flex-hones working range is down to 3.000". Thank you for the inquiry.

Can i use this to hone out an old cast iron pipe? it's about 3 3/4" now and i want it at 4" id. thanks

This hone is not coarse enough to remove that much material. It would take forever and the hone would wear out first. You would need a lathe to remove that amount of thickness.

I see that it says tool is oversized. For a cylinder bore of 3.66, should I be getting the 3.75 or the 3.50 model?

1I bought a 4.50 and used it on a 3.55 bore with no problem I didn't hone as much as instruction said for large bore, hatch marks were beautiful so go bigger and you can use it over a broad area of bores.

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⚙️ Hone your edge, own the finish.

DURABLE RELIABLE - Engineered to maintain performance despite wear, ensuring long-lasting efficiency.
EFFORTLESS ALIGNMENT - Self-centering and self-compensating design guarantees consistent results every time.
PRO GRADE FLEXIBILITY - Flexible abrasive cylinder adapts seamlessly to complex surfaces and cross holes.
VERSATILE COMPATIBILITY - Fits bore sizes from 4mm up to 36 inches—perfect for hand or CNC use.
PRECISION SURFACE PERFECTION - 120 grit silicon carbide delivers ultra-smooth finishes and flawless deburring.

The Brush Research FLEX-HONE GB Series is a 3.5-inch diameter silicon carbide abrasive cylinder hone with 120 grit size, designed for precision surface finishing and cross hole deburring. Its self-centering, self-aligning, and wear-compensating features ensure consistent, professional-grade results whether used by hand or in CNC equipment. Sized oversized for exact bore fit, it supports a wide range of bore diameters from 4mm to 36 inches.

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Grit type	120
Unit count	1.0 count
Number of pieces	1
Recommended uses for product	Deburring, Finishing
Manufacturer	Brush Research Mfg.
UPC	843469142832
Item diameter	3.5 Inches
Part number	GB31212
Item Weight	322 g
Item model number	GB31212
Size	3-1/2\
Style	120 GRIT
Item Package Quantity	1
Cutting Diameter	3.5 Inches
Measurement System	Inch
Grit Number	120
Included components	GB 3-1/2" (89MM) 120SC FLEX-HONE
Batteries included?	No
Batteries Required?	No

Brush Research FLEX-HONE Cylinder Hone, GB Series, Silicon Carbide Abrasive, 3-1/2" (89 mm) Diameter, 120 Grit Size

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