Xuzhou GC Abrasives Co., Ltd.
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Mounted points are small grinding wheels bonded onto a spindle or mandrel. They are commonly used in precision engineering, tool and die making, foundries, and metalworking workshops for tasks that require high accuracy and fine surface finishes. Their versatility makes them invaluable for deburring, grinding, polishing, and finishing hard-to-reach areas or intricate components. For example, after machining a steel gear, a mounted point can be used to carefully deburr the gear's teeth and inner edges, ensuring smooth operation and reducing the risk of premature wear. This real-world scenario demonstrates how mounted points can access intricate parts that larger tools cannot reach, making them a practical solution for achieving precision and quality in finished products.
Vitrified mounted points, especially pink abrasive points, are widely used for precision grinding and deburring. They perform exceptionally well on all metals but are particularly effective on harder steels. These tools are often used in foundries and engineering workshops to deburr and clean castings and machined parts.
Common uses for mounted points include:
Deburring, cutting, grinding, blending welds, cleaning, chamfering, and edge breaking in industries that require precision metal components.
Vitrified mounted points are available in a range of shapes to suit specific applications. Selecting the right shape depends on your workpiece's geometry and the task you need to perform. For example, ball shapes are ideal for deburring the insides of holes or curved surfaces, where access is limited. Cones and pointed tree shapes are best for reaching into narrow spaces, tight edges, or small holes. Trapeze shapes are suitable for deburring along back edges or flat surfaces. By considering the contours and features of your component, you can choose the most effective mounting point shape to achieve accurate, efficient results.
Grades of Mounted Points
Mounted points are typically manufactured with vitrified bonds using corundum and aluminum oxide grits. They are offered in several grades to accommodate various materials and finishes.
Pink – The most widely used grade, made from aluminum oxide with low to medium chromium oxide content. It is a hard abrasive that retains its shape and produces a fine surface finish. It is ideal for use on steel, cast steel, cast iron, hardened and tempered steels, alloyed steel weld seams, and tool steels.
Ruby – Composed of aluminum oxide with a high chromium oxide content, this grade has a coarser grit that breaks down more rapidly. It is excellent for aggressive cutting and material removal, and is best suited to steel, cast steel, cast iron, hardened and tempered steels, alloyed steel weld seams, and tool steels.
Blue – A finer grit option for general work, offering low to medium stock removal and a smooth surface finish. Blue-mounted points are best on tool steel but also work well on glass, ceramics, carbide metals, and other hard materials.
When selecting a mounting point, consider the differences among these grades in key performance factors. Pink grade delivers a balanced combination of cutting speed, durability, and surface finish. It maintains its shape well, providing consistent results over time and leaving a fine finish that requires minimal additional polishing. Ruby grade offers the fastest cutting speed and excels at heavy stock removal, but breaks down more quickly, resulting in a shorter tool life and a coarser finish. Blue grade is best when a superior surface finish is needed, as it removes material more slowly but leaves a smoother surface. Its durability and shape retention are typically between those of pink and ruby grades, making it a good choice for precision finishing tasks.
Mounted points are typically supplied in packs of 10, mounted on 3mm spindles (with 1/8" and 3/32" spindle options available). These spindle sizes are compatible with a variety of tools, including rotary tools like Dremel, pneumatic or electric die grinders, flexible-shaft machines, and certain high-speed hand drills. When choosing mounting points, check your equipment's spindle size requirements to ensure a proper fit and safe operation.
Per pack of 10 points, all points are on a 3mm spindle (1/8″ and 3/32″ spindles are available)
Alternative Products to Pink Vitrified Points
Rubber points are softer and provide an even finer finish, making them ideal for ultra-smooth polishing of metals or delicate surfaces where minimal material removal is required. Choose rubber points when your primary goal is to achieve a mirror-like surface, especially on small or intricate parts that have already been ground to shape with vitrified points. Use vitrified points for more aggressive material removal, precise deburring, or shaping tasks, then switch to rubber points for final finishing or where a gentle touch is needed.
MX points use a cotton-bonded abrasive that grinds efficiently and leaves a superior finish.
Carbide burrs are highly efficient for heavy material removal and clean deburring tasks.
