Brush Research FLEX-HONE Cylinder Hone, BC Series, Silicon Carbide Abrasive, 3 (76 mm) Diameter, 240 Grit Size

Used the 3” 240 grit. Did an amazing job on the steel sleeves in this machine for a set of SPI pistons. Compression and performance are still spot on after 800 miles of use. Definitely would recommend.

Used this for my Predator 212cc go kart build, where I was swapping to a flat top piston for additional compression. While the cylinder didn’t look bad to begin with, this hone made it look great. I coated the hone in oil and utilized it for around 30 seconds per the instructions. Can’t wait to use its again on the next build!

If you are only a tiny bit over the nominal size do not follow the instructions and go up one size. They are oversized to begin with (my 1 1/8 hone being a few thousandths shy of 1 1/4). I bought a 1 1/8 hone to remove the seam from 1 SCH40 pipe and open it up from 1.03 to 1.06 so that 3/4 pipe will telescope in structural applications. I also intended to use it to open up 25mm aluminum C-cell flashlight tubes to fit 26mm LiFePO4 cells (1.026). I am hoping that after breaking in the hone on the steel pipe I will be able to start it in the aluminum tube without damaging the end. I think in both cases I would have been better served in not following the instructions and buying the 1 hone instead.

Wow, I didnt know how great a tool this was! Perfect honing and amazing product engineering.

This was exactly what I needed at a VERY affordable price. Came in 3 days!! Wicked F A S T shipping!!

This was exactly what I needed at a VERY affordable price. Came in 3 days!! Wicked F A S T shipping!!

I have personally relied on products from this company for a very long time in a professional setting. As far as ball Hones go Flex-Hone is the best and has been. The quality is top notch and the number of sizes they make are unequalled by any other company

This is an easy way to remove a small amount of metal from cylinders. It creates a smooth surface. I would recommend this item to others who wish to enlarge the inside of a cylinder.

Worked great

Worked great