What are the 3 types of grinding wheels we use?

There are three main types of grinding wheels, where various numbers differentiate between wheels with specific properties and uses — type 1 snagging wheels, type 27 grinding wheels and type 28 grinding wheels.

What are the grinding wheel selection factors?

After the abrasive material and wheel shape, main factors for wheel selection are grit size, bond type and bond hardness. Workpiece material dictates the abrasive, wheel shape and type of bond. Grit size and bond hardness usually are chosen based on surface finish requirements and the hardness of material.

What is a Type 27 grinding wheel used for?

The Type 27 grinding wheels are a very popular group of general purpose and specialized abrasive tools intended for rough grinding on various materials. They are commonly used in building, shipbuilding, metal, foundry, engineering, chemical and other industries as well as in smaller workshops.

How are grinding wheels specified?

A standard marking system is used to specify and identify grinding wheels. The number ’46’ specifies the average grit size in inch mesh. For a very large size grit, this number may be as small as 6 whereas for a very fine grit the designated number may be as high as 600.

How do you measure a grinding wheel?

The size of the grinding wheel is marked as dimensions in mm. For example, 230 x 3 x 22.2mm. This represents the wheel’s diameter x thickness x hole size.

What is the difference between Type 27 and Type 29 grinding wheels?

Type 27 is used for grinding the plane and outside corners. The grinding surface of the curved flap disc, Type 29, has an upward curvature, allowing it to grind at a steeper angle. It is mainly used for grinding of corners and edges. When speed and cutting ability have higher requirements always recommend the Type 29.

What is a Type 28 Grinding Wheel?

Type 28 Depressed Center Wheels Aluminum Oxide abrasive is suitable for cutting and grinding ferrous metals. Ceramic abrasive is suitable for fast cutting on almost all materials, including stainless steel, mild steel, and aerospace alloys.

What is the grinding ratio?

Grinding ratio is defined as the volume of material removed from the work per unit volume of wheel wear. It is related with Young’s modulus, the elastic failure energy and the visco-elastic properties of bond.

What are the types of grinding wheels?

It includes:

• Centerless Grinding Wheel.
• Cylindrical Grinding Wheel.
• Tool Room Grinding Wheel.
• Surface Grinding Wheel.
• Gear Grinding Wheel.
• Bench Grinder wheels and.
• Grinding cup Wheel.
• Roll Grinding Wheel.

What are the main two types of grinding wheel specifications?

Abrasive grains of the diamond wheel are of two types: natural diamond (D) and synthetic diamond, which is often used in industrial applications. “Synthetic diamond (SD)” and “metal coated composite diamond (SDC)” are used for the grinding wheel.

What grit size is used for rough grinding?

An abrasive grit size of 180-240 [P180-P280] is coarse enough to use on specimen surfaces sectioned by an abrasive wheel. Hack-sawed, bandsawed, or other rough surfaces usually require abrasive grit sizes in the range of 120-180 grit [P120-P180}.

How to select the right grinding wheel for your application?

Selecting the right grinding wheel. There are nine main factors to be considered when selecting a grinding wheel for any application: 1. What material will you be grinding and how hard is it? 2. What stock needs to be removed from the material? 3. Work out the shape of the material and the surface finish (or finishes) that are required. 4.

What grit size wheels do I need for grinding?

For this reason, finer grit sized wheels are required to grind hard materials and soft materials are best ground with medium to coarse grit size wheels. For most efficient operation, the grade must be adjusted to suit the hardness of the material. As a general guide, the harder the material, the softer the grade of wheel required.

How to choose the right abrasive for your wheel?

The first consideration is the material to be ground. This determines the kind of abrasive you will need in the wheel. For example, aluminum oxide or zirconia alumina should be used for grinding steels and steel alloys. For grinding cast iron, non-ferrous metals and non-metallic materials, select a silicon carbide abrasive.

What are the different parts of an grinding wheel?

Grinding wheels and other bonded abrasives have two major components-the abrasive grains that do the actual cutting and the bond that holds the grains together and supports them while they cut. The percentages of grain and bond and their spacing in the wheel determine the wheel’s structure.