---
title: Abrasive Specifications
description: Cotton Fiber Abrasives are available in many grits and bonds. Find out the difference between GFX, JTX, MTX, and NTX here.
---

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# Rex-Cut Support

For more information about specific products, applications, and safety, contact a Rex-Cut expert or take a minute to browse our product resources.

## Standard Marking Specifications

Rex-Cut Cotton Fiber products are constructed with our signature abrasive material which is manufactured exclusively in our Fall River, Massachusetts plant.

| Grain Type |  |
| --- | --- |
| A | Aluminum oxide |
| C | Silicon carbide |

| Grain Size |  |
| --- | --- |
| 16, 24, 36 | Coarse |
| 54, 80 | Medium |
| 120, 180 | Fine |
| 320* | Very Fine |

** Available only in aluminum oxide*

| Bond |  |  |
| --- | --- | --- |
| GFX | Soft | Flexible synthetic latex bond for light deburring, blending, and finishing in one operation. |
| JTX | Medium | Medium resin bond for light deburring and long life. |
| MTX | Hard | Hard resin bond for light to medium stock removal and long life |
| NTX | Very Hard | Very hard resin bond for medium stock removal and long life |
| IGX | Soft | For specialty applications |

![wheel_spec](https://www.rexcut.com/hs-fs/hubfs/assets-apr-2018/charts/wheel_spec.jpg?width=800&name=wheel_spec.jpg "wheel_spec")

## Surface Finishing Comparisons

Measured in micro-inches for a value of RA (roughness average)

| Grain Size | Conventional Abrasives RA* | Rex-Cut Cotton Fiber RA** | Sigma Green RA** |
| --- | --- | --- | --- |
| 24 | 210 - 240 | 110 - 130 |   |
| 36 | 185 - 205 | 38 - 80 | 100 |
| 54 (60) | 140 - 180 | 30 - 60 | 80 |
| 80 | 65 - 175 | 20 - 50 |   |
| 120 | 45 - 60 | 15 - 30 |   |
| 180 | 25 - 40 | 10 - 20 |   |
| 240 | 8 - 20 | N/A |   |
| 320 | 6 - 15 | 5 - 10 |   |

### ** Industry data for conventional abrasives on stainless steel ** Rex-Cut RA values measured with a Mahr Federal Surface Analyzer. The values are an average taken from multiple measurements on 304 stainless steel.*

 

## Grinding Wheel Spectrum

![grinding_spectrum](https://www.rexcut.com/hs-fs/hubfs/assets-apr-2018/charts/grinding_spectrum.jpg?width=800&name=grinding_spectrum.jpg "grinding_spectrum")

## Application Information

Need to find out which abrasives work best for the application you are working on? View our application charts here.

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## Still have questions?

Don’t hesitate to contact us for more information about Rex-Cut products, applications, safety, and more!

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Fax: (800) 638-8501

[CONTACT](https://www.rexcut.com/contact?hsLang=en)

 

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