Type 5 Grinding Wheels Drive Precision Machining Industry

Imagine the perfect flatness of an automobile engine cylinder head, the precise contours of aircraft engine blades, or the flawless finish of bearing raceways—all these engineering marvels rely on an unassuming yet critical tool: the Type 5 straight grinding wheel. More than just an abrasive tool, it serves as an indispensable foundation in precision manufacturing, working silently on production lines across industries to create countless high-precision components.

As the name suggests, Type 5 straight grinding wheels feature a flat shape and are widely used in various grinding operations. They excel particularly in surface grinding, cylindrical grinding (including centerless and centered grinding), internal grinding, tool sharpening, and form grinding. Their versatility makes them ideal for workshop operations, capable of handling both heavy-duty rough grinding and fine precision work.

Type 5 wheels play pivotal roles in industries demanding extreme precision—such as automotive, bearing manufacturing, and aerospace—as well as in various machining operations and tool manufacturing facilities.

Type 5 wheels manufactured by Andre Abrasive Articles use vitrified bonds and are produced with various high-quality abrasive materials, including:

• Brown Aluminum Oxide (95A): Known for good toughness, this abrasive is suitable for grinding materials with high tensile strength like carbon steel and alloy steel. Its excellent wear resistance and strong cutting force make it widely used in rough and semi-finish grinding.
• White Aluminum Oxide (99A): With higher purity and slightly greater hardness than brown aluminum oxide (though with slightly less toughness), it offers sharp cutting with low heat generation. Ideal for grinding heat-sensitive materials like hardened steel and high-speed steel, it produces superior surface finishes.
• Pink Aluminum Oxide (CRA): Produced by adding small amounts of chromium oxide to white aluminum oxide before firing, it features higher hardness and wear resistance with improved cutting performance. Suitable for precision and form grinding, it achieves exceptional dimensional accuracy and surface quality.
• Black Silicon Carbide (98C): Extremely hard but brittle, this abrasive works well on hard, brittle materials like cast iron, non-ferrous metals, ceramics, and stone. Its self-sharpening properties provide sharp cutting edges and high grinding efficiency.
• Green Silicon Carbide (99C): With higher purity and slightly greater hardness than black silicon carbide (but also more brittle), its sharper cutting edges suit harder, more brittle materials like carbide alloys and optical glass.

For specialized applications, Andre also offers other abrasive combinations to meet higher performance requirements.

Type 5 wheel markings typically include:

• Wheel Type: 5 (indicating straight wheel)
• Dimensions: D × T × H (outer diameter × thickness × bore diameter in millimeters)
• Abrasive: e.g., 95A, 99A, CRA, 98C, 99C
• Grit Size: e.g., 60 (higher numbers indicate finer particles)
• Hardness: e.g., J (later letters in the alphabet indicate harder grades)
• Bond Type: e.g., 7 (indicating bond classification)
• Structure Number: e.g., VC01 (indicating abrasive density in the wheel)
• Maximum Operating Speed: e.g., 35 (maximum permissible operating speed in meters per second)

Formula: F ≤ 0.5T; P > 0.33D

Where:

• D = Outer diameter
• T = Thickness
• H = Bore diameter
• P = Mounting surface width
• F = Wheel side width

For example: 5 - 300×50×76-P200F25-98C60J7VC01-35 indicates a Type 5 straight wheel with 300mm outer diameter, 50mm thickness, 76mm bore diameter, 200mm mounting surface width, 25mm wheel side width, black silicon carbide abrasive (98C), 60 grit, J hardness, type 7 bond, VC01 structure, and 35m/s maximum operating speed.

The following table lists some standard Type 5 wheel specifications offered by Andre:

Note: Custom sizes and profiles can be manufactured according to specific customer requirements.

Type 5 wheels using 99A white aluminum oxide abrasive are particularly suitable for precision grinding of steel and cast steel components. Typical applications include face grinding of shaft components (using centers or centerless grinders), internal grinding, and various workshop operations.

Example of a 99A white aluminum oxide wheel:

• Code: 515005
• Dimensions [mm]: 80 × 50 × 20
• Characteristics: P40 F25 99A60K7VE01
• Speed [m/s]: 35 (maximum operating speed)
• Per box: 18 (quantity per box)

Andre Abrasive Articles combines deep technical expertise with extensive customer collaboration to produce high-quality abrasive products. Since its founding, the company has prioritized product quality, striving to meet individual customer needs while exceeding expectations in even the most demanding grinding applications.

Andre's abrasive products meet all relevant safety standards. The company continuously improves its technical processes to provide tools with higher usability and safety factors. Membership in leading abrasive manufacturer organizations and regular certifications demonstrate Andre's commitment to product quality and safety.