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🛠️ Elevate your cylinder finish game — don’t get left behind!
The Brush Research GB31424 FLEX-HONE® is a 3.25" diameter, 240 grit silicon carbide honing tool designed for mild steel, stainless steel, cast iron, and softer ferrous materials. Its patented oversized, flexible abrasive design ensures self-centering, self-aligning, and self-compensating action for consistent, high-quality finishes. Perfect for deburring and finishing hydraulic, pneumatic, engine, and brake cylinders, it produces an optimal oil-retentive crosshatch pattern that enhances seal life and performance. Made in the USA by the original FLEX-HONE® inventors, this tool is a must-have for professional machinists and engine rebuilders seeking precision and efficiency.
| ASIN | B002XUL1F8 |
| Best Sellers Rank | #8,192 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Flex Hones |
| Brand | Flex-Hone |
| Brand Name | Flex-Hone |
| Bristle Type | Abrasive Globule Bonded To Flexible Nylon Filament |
| Color | Gray |
| Compatible Material | Other Softer Ferrous Materials, Stainless Steel, Mild Steel, Cast Iron |
| Customer Reviews | 4.8 out of 5 stars 1,854 Reviews |
| Global Trade Identification Number | 00843469143396 |
| Grit Material | Silicon Carbide |
| Grit Material Type | Silicon Carbide |
| Grit Type | 240 Grit |
| Included Components | GB 3-1/4" (83MM) 240SC FLEX-HONE |
| Item Diameter | 3.25 inches |
| Item Dimensions | 13.5 x 5.1 x 5.1 inches |
| Item Dimensions L x W | 13.5"L x 3.25"W |
| Item Type Name | Brush Research GB31424 FLEX-HONE®, 3-1/4" (83mm) Diameter, 240 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials |
| Item Weight | 10.4 ounces |
| Manufacturer | Brush Research Manufacturing |
| Material | Silicon Carbide |
| Material Type | Silicon Carbide |
| Model | GB31424 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Part Number | GB31424 |
| Product Dimensions | 13.5"L x 3.25"W |
| Recommended Uses For Product | Deburring, Finishing |
| UPC | 600717230037 843469143396 |
| Unit Count | 1 Count |
| Warranty Description | Manufacturer Warranty |
J**E
works great
works good as usual... a vital necessary tool in engine rebuilding...
L**R
Five stars!
The FLEX-HONE® is an outstanding tool for deburring and surface finishing! The 240-grit silicon carbide abrasive works perfectly on mild steel, stainless steel, and cast iron. It delivers a smooth, uniform finish with minimal effort. Durable and easy to use—highly recommended for automotive and machining applications. Great value for the quality.
G**R
Barely Fit 3.6" bore.
Buy exact fit to the .10" or one .10" larger Working on a 22r Toyota stock bore 3.6". This hone did it's job with a nice cross hatch. However, the hone just barely hit the bore walls. Maybe this is by design but I feel I should have gotten the 3.75" bore hone as my bore size is 3.6" If your bore is 3.5" then you would be fine. The hone would have a bit of pressure on the bore walls. If you plan on honing a 22r look for the next size up. The balls on the hone wore down Farley fast making flat spots on most the balls. So when you use this you do not want to hone one bore at a time. Make like 2 passes per bore to break in the hone tell you have broke the glazing off the bore walls and broke in the hone, then work on your cross hatch pattern. Over all I like this hone and it's ease of use but the fact that I most likely will not be able to use it again, I may get one more use from it in 5-8 years witch would pay for it self then but a stone hone would be more cost effective. If you build the same 3.5" size bore engine all the time this hone would be ideal. Cause you can just grab put in drill and hone (adding cutting oil).
D**S
Perfect Tool for Smoothing Various Metal Surfaces
I recently tried out the Brush Research GB41824 FLEX-HONE® in 4-1/8" diameter with 240 grit, and I am amazed by its performance. This tool is ideal for working on mild steel, stainless steel, cast iron, and other softer ferrous materials. The results were fantastic – the surfaces were smooth and polished to perfection. I love how versatile this FLEX-HONE® is, making it a valuable addition to my workshop. I highly recommend it to anyone looking to achieve professional results with ease.
I**H
the better ones I have used it did take time though and he got to watch what you use oil basis
This is one of the best ones I've ever used cleaned up the Sounders awesome but took time!
O**A
Helpful tool for engine work
I found this hone to be quite useful after not rebuilding an engine for a while. Its larger surface area makes it easier to keep the surface even. The pressure stays steady across the stone, which contributes to a smooth finish. I recently used it on a small Chevrolet engine, and it definitely simplified the job.
K**E
Works great
Worked great
J**L
Good product
I’m please with the cylinder wall finish
K**T
Flex-Home Cylinder
Met expectations..Very well built product..
J**M
Good tool
Worked well
E**S
Works well
Worked well for cleaning up 460 ford engine
A**R
It works
Used a few times to finish after using 4 stone plattow hone .
M**N
Easy to use
Very easy to use. Lubricate well and use correct rpm. Online tip of moving very quickly to get good crosshatching works. Don't forget, only for use if cylinders not out of round. Very impressed with this hone.
Trustpilot
5 days ago
1 week ago