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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Flex-Hone Brush Research Cylinder Hone, GB Series, Silicon Carbide Abrasive, 3-1/2" (89 mm) Diameter, 240 Grit Size

Product ID: 357338518

Details

Brand
Flex-Hone
Bristle type
Crimped Wire
Grit material
Silicon
Material
Silicon
Product dimensions
34.3L x 13W

🔧240 grit silicon carbide for precision finish

⚙️3.5" diameter for versatile fit

🇺🇸Made in USA for trusted quality

99302CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔩 Elevate your metal finishing game with the original Flex-Hone — where precision meets effortless perfection!

UNIVERSAL COMPATIBILITY - Works seamlessly with hand drills, drill presses, and CNC machines—no special setup needed.
PRECISION PLATEAU FINISH - Achieve a flawless 24-32 Microinch surface for superior oil retention and seal longevity.
ALL IN ONE DEBURRING FINISHING - Simultaneously deburr crossholes and finish cylinders in a single setup—boosting efficiency.
DURABLE SILICON CARBIDE ABRASIVE - Engineered for mild steel, stainless steel, cast iron, and softer ferrous metals with consistent results.
SELF CENTERING WEAR COMPENSATING - Innovative design ensures perfect alignment and extended tool life without extra training.

The Flex-Hone GB Series is a 3.5-inch diameter silicon carbide abrasive brush designed for precision plateau honing and deburring of ferrous metals. Made in the USA, it delivers a consistent 240 grit finish that enhances oil retention, seal performance, and surface longevity. Compatible with various rotating spindles, it offers a self-centering, self-aligning design that simplifies setup and maximizes efficiency across automotive, industrial, and precision applications.

Specifications

ASIN	B002XUL1EE
Brand Name	Flex-Hone
Bristle Type	Crimped Wire
Compatible Material	Metal
Customer Reviews	4.8 4.8 out of 5 stars (382)
Grit Material Type	Silicon Carbide
Grit Type	Medium
Item Dimensions	34.3 x 13 x 13 centimeters
Item Dimensions L x W	34.3L x 13W centimeters
Item Weight	308 g
Manufacturer	Brush Research Mfg.
Material Type	Silicon Carbide
Number of Pieces	1
Unit Count	1.0 Count

Reviews

J**M

Worked well

23.11.2025

J**H

Quick ship and decent quality.

30.08.2019

D**Y

Excellent product

19.01.2026

A**R

I used this on a Seadoo jet ski, and it exceeded my expectations

25.02.2026

R**B

Thought I would have to take the block to a machine shop, but I'm very pleased with how it turned out. Used this with the Flex-Hone oil and the N55B30 engine cylinders don't have any more rust, are nice and sparkly clean with a beautiful cross-hatch. Great product.

4.12.2025

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