How To Choose The Grinding Mounted Point For Your Abrasive?

How To Choose The Grinding Mounted Point For Your Abrasive?


To achieve the results you want from deburring or edge-breaking, the key is to choose the most suitable mounted point for your application. These 4 steps can help you evaluate your application and select the best abrasive for your job.

Step 1: Select the Grain Type

At Rex-Cut, we suggest aluminum oxide for the majority of applications calling for mounted points. Aluminum oxide is a versatile grain and paired with our specialty bonds, it grinds exceptionally well on stainless steel, carbon steel, mild steel, aluminum, as well as certain alloys. For applications requiring high purity or brighter surface finish, such as medical implants or select aerospace components, silicon carbide, a sharper grain than aluminum oxide, may be preferable.

Zirconi alumina points are an excellent option for heavier stock removal.

Step 2: Choose the Right Bond

As a guideline for selecting the bond of the point, softer bonds work best on harder metals, and harder bonds on soft metals. Soft bonds such as our GFX, are able to shed easier, allowing fresh grain to be revealed for faster grinding. Harder bonds such as our MTX, hold on to the grain longer resulting in more controlled metal removal, in turn the point lasts longer.

Within the last year we started making mounted points with a rubber bond. These rubber points are often used in edge breaking applications. Removing the edge on stainless steel sheet metal before fabrication is one specific application we see regularly

Tip: For aluminum, you will want to look for a non-loading bond. Because aluminum has a low melting temperature, it can load up the abrasive product you are working with. A naturally non-loading bond such as our GFX, JTX, and MTX, will work great on aluminum without needing compounds or waxes.

Step 3: Find the Perfect Shape

In a perfect situation you would have full access to the area you are working on, but often burrs and sharp edges are in hard to reach areas. Mounted points come in A, B, and W shapes to fit many different applications. There are small shapes to deburr tiny i.d.s, larger points such as the W222 which is often used in the edge breaking application we mentioned, and even specialty points such as the seat track cleaner which were designed to remove grime and corrosion on aircraft seat track.

Step 4: Check Maximum Operating Speed

Before running the mounted point, check to make sure the tool you are using does not exceed the maximum operating speed of the point. This is an important safety step. In addition, operating at too high of a speed can reduce the life of your point and decrease the quality of the deburring job.

Trial and Error

After you go through the steps of selecting a mounted point, test it. If it is not giving you the results you want, make notes of what isn't working. If you are getting a surface finish that is too rough, go with a finer grit. If the point is taking off too much metal, go with a harder bond. Sometimes it takes more than one try to find the right mounted point(From

We would like to recommend a complete buffing wheel set to meet all your needs for polishing a wide variety of workpiece.

Used for carving, grinding and polishing to make the polished goods cleaner and brighter. Perfect for metal, jade, various molds, glass, medical equipment, gold and silver jewelry, non-metallic surfaces, etc.
Designed with mandrel mounted 1/8-inch shank, can be used with electric pneumatic drills, grinders, hanging mills, Dremel or other rotary tools.

Shank diameter: 1/8 inch(3mm)
Head diameter: 4mm/ 5mm/ 6mm/ 8mm/ 10mm
Materials: Wool, Rubber, Abrasive Stone, Sesame and Cowhide
Head Shape: 50pcs Cylinder shaped and 50pcs Bullet shaped

Instructions for Each Grinding Head:
1.The Pink Abrasive Stone Head is for sanding chamfering
2.The Sesame Grinding Bit is for rough grinding of metal such as aluminum and copper
3.The Cowhide Grinder Heads have good elasticity and wear resistance, perfect for fine polishing of agate, jade, mold, copper and aluminum
4.The Green Rubber Grinding Head is used for quick fine polishing of hardware accessories, jade and more
5.The Wool Bit is for mirror polishing, widely used in pneumatic, electric rotary grinder, various molds etc.
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