Shape

Custom honeycombing services tailored to meet specific customer requirements.

Sizes

Why YASH Grinding Wheels?

Better finishing and a greater rate of removal of material. 

The ability to grind tough materials and components. 

Minimal dressing cycles are necessary due to no burning and no microstructural changes in the materials, increasing wheel life. 

Highly specialised customer service to address certain consumer issues. 

Popular equipment are readily available, and as a result, the operational duration is as minimal as one weeks after an order confirmation.

Our wheels are priced at best rate.

Applications

Silicon Carbide: - This is sharp and hard and it can be brittle. It should use this only in grinding of low tensile strength materials such as grey cast iron, chilled iron, bronze, aluminium, copper, and brass.

Aluminium Oxide: - This is slightly softer than Silicon Carbide but much tougher. It should be in cutting and grinding high tensile strength materials like alloy steel, malleable iron, bronze, etc.

• Automotive • Railway Coils • Spring • Tools • Engineering Industries • Forging • Casting • Hammer • Plier • Files • Saws • Chisel • Steel Fettling • Knife blades • Shears • Scissors • Surgical instruments • Guillotine knives • Mowing and chopping blades • Cutter blades • Planes • Spatulas • Trowels • Garden Shears • Hatchet • Axes • Hoes • Shovels • Spades

General Information of the Product

Abrasion is a technique that is commonly used to define "grinding." Sharp abrasive grains applied to the face or the sides of bonded grinding wheels remove the material. In fact, the grains eliminated chips from the operation. Off-hand grinding and precision grinding are the two main forms of grinding.

Off-hand grinding, also known as non-precision grinding, is the process of manually applying the grinding wheel to the job or off-hand applying the work to the grinding wheel. Snagging of castings or forgings, tool sharpening, weld grinding, cutting off, bench grinding, or pedestal grinding applications are all examples of off-hand grinding.

When precision grinding is done on a machine, the traverse and/or feed rates can be adjusted, and the process parameters can be monitored and managed. As the term suggests, there is a greater demand for surface polish, geometry, size control, etc. in this situation. Grinding processes that fall under the category of precision include cylindrical, centre-less, internal, surface, tool and cutter, thread, crankshaft, and camshaft grinding.

In essence, a grinding wheel is a precision tool made of abrasive grains that are held together by a bond. The abrasive grains give the wheel its cutting points, which in turn aid in either accurately cutting the material to the desired dimensions or enhancing the surface finish.

A distinct characteristic known as "structure" or "pores" is produced by how the abrasive grain and bond are arranged in the grinding wheel. These pores allow for chip clearance and are created based on application requirements.

Types of Bond used in grinding wheels

The various bonds used in grinding wheels or bonded abrasives are Vitrified, Resinoid, Rubber, Silicate, Shellac, Magnesite and Metal bonds. Besides holding the grains in the wheel, these bonds also help in defining the type and character of the grinding wheel.

Resinoid or Organic (B) Bonds

Resin-based "plastics" or "resins" are used to create resinoid or organic bonds, which are then baked at temperatures between 150°C and 200°C to cure. Resinoid wheels are more durable and less rigid than vitrified wheels. They are perfect for heavy duty activities and high working speeds, frequently with the help of fabric or steel ring reinforcement. Their lower elasticity modulus aids in producing finer finishes. Resinoid bonded wheels, in contrast to vitrified wheels, are impacted by alkali, humidity, or harsh climatic conditions and have a propensity to degrade over time.

Magnesite (O) Bond

The letter "O" designates magnesium oxychloride, which is used in a very small selection of wheels. It is highly favoured in disc grinders and is cool cutting even without a coolant. Since it has a cold setting, this bond is also employed while grinding heavy stocks, such as springs and files. It is also known as Oxychloride Magnesite Bond.

Types of Abrasives:

The two main abrasives utilised in the production of grinding wheels are silicon carbide and aluminium oxide. These artificial or synthetic abrasives give precise control over the shape and makeup of the abrasive grain. As a result, it is employed in the production of grinding wheels with extremely particular performance criteria related to application needs.

• Brown Aluminium Oxide Grits

• White Aluminium Oxide Grits

• Silicon Carbide Grits

• Brown & White Aluminium Oxide Mix Grits

• Aluminium Oxide & Silicon Carbide Mix Grits

Brown Aluminium Oxide

By processing bauxite ores in an electric furnace, this grain is produced. To create the furnace charge, the bauxite is burned to remove any moisture before being combined with coke and iron borings. The combination is fused and cooled, and the resulting material, which resembles rock, is then crushed and screened into different sizes.

The number of impurities (iron oxide, titanium oxide, and silica) affects the abrasive colour and toughness.

The effects of additives on toughness are also substantial.

For grinding most steels, annealed, malleable and ductile iron, and non-ferrous cast alloys, the most widely used abrasive, aluminium oxide, is typically advised.

• Abrasive denoted: A

• Properties: Very tough abrasive

• Major Applications: Used for heavy duty work such as snagging steel casting and for stock removal in cylindrical grinding, on all but the hardest and most heat- sensitive steels like low alloy steel, cast steel and rough grinding applications.

Aluminium purity in white aluminium oxide is over 99%, making it a highly refined form of aluminium oxide. This abrasive exceptional purity gives it a distinctive white colour as well as the special quality of being extremely friable. However, this abrasive has a hardness that is comparable to brown aluminium oxide (1700–2000 kg/mm knoop).

White Aluminium Oxide

This white abrasive is particularly well suited for grinding hardened or high speed steel in a variety of precision grinding processes because of its incredibly quick and cool cutting and grinding qualities.

• Abrasive denoted: WA

• Properties: More friable than Brown Aluminium Oxide. This is also a cool cutting grain.

• Major Applications: WA is used for light grinding of all kinds of hard, heat-sensitive steels. It is excellent for tool room grinding, sharpening of high speed steel, cast alloy tools like hardened steel, H.S.S., Tool steels S.S (400 series) and chrome plated material. It is also recommended for cylindrical, surface and internal grinding applications of tools, dies and gauges.

Brown Aluminium Oxide & White Aluminium Oxide Mix

A blend of Brown and White Aluminium Oxide 

• Abrasive denoted: DA or MA

• Properties: DA is a blend of brown regular A and white WA and therefore, has intermediate grinding actions.

• Major Applications: Used in applications where high stock removal rate with less thermal damage and better form holding is required. E.g.: Cylindrical plain and angular head grinding, camlobe grinding, inner ring track grinding, bore grinding.

Black Silicon Carbide 

In an electric furnace, pure white quartz (sand) and fine petroleum coke are fused to create silicon carbide (SiC). In contrast to the process of refining bauxite into aluminium oxide, this one involves synthesising, or mixing, the sand and coke. The resulting crystalline mass is once more broken down and classified according to particle size.

In addition to being harder than aluminium oxide abrasives, silicon carbide abrasives are also more friable.

These qualities make silicon carbide abrasives perfect for grinding non-metallic materials like glass, gemstones, plastic, and rubber as well as low tensile materials like grey iron and unannealed malleable iron.

• Abrasive denoted: C

• Properties: Very hard and more friable than Aluminium oxide.

• Major Applications: It is used for general grinding, heavy duty snagging, cylindrical, centre-less and internal grinding. With a specialised bonding process, it is also used for grinding cemented carbide, for bench grinding and centreless grinding applications. Also used for non- ferrous materials, cast iron, stainless steel and rough grinding applications.

Brown Aluminium Oxide & Black Silicon Carbide Mix 

A blend of Aluminium Oxide and Silicon Carbide; this is used for specialised precision and non-precision applications.

• Abrasive denoted: AC

• Properties: Combined properties of A and C.

• Major Applications: Used mainly in specialised precision and non precision applications.

Elements of Abrasives 

Grain or Grit Size 

The size of the abrasive grain is expressed by the size of the screen opening through which the grains are sifted or sorted. For instance, a grain or grit which goes through a screen 8 mesh or openings per linear inch is called 8 grain or grit size, while a 24 grit size is roughly twenty fourth of an inch across. The higher the grit size, the finer its type. 

Coarse 10, 12, 14, 16, 20, 24

Medium 30, 36, 46, 54, 60

Fine 80, 100, 120, 150, 180

Very Fine 220, 240, 280, 320, 400, 500, 600

Structure 

This is basically the spacing of the abrasive grains in a wheel or the volume content of the abrasive in the wheel. This is defined by the 'voids' or spaces between the abrasive grain and the bonding material and is called wheel 'porosity'. A 'close' structure wheel is one where the volume of closely packed grains is more. These are given structured numbers of 1 and 2. Conversely, 'open' structure wheels are those with wider grain spacing. 

The structure refers to the spacing between the abrasive grains in the grinding wheel.

It is denoted by the number of cutting edges per unit area of the wheel face and size of void spaces between grains.

If there are a large number of cutting edges per unit area, the structure is called a dense structure; otherwise it is called an open structure.

The different structure of the grinding wheel as follows:

Dense 1, 2, 3, 4, 5, 6, 7, 8

Open 9, 10, 11, 12, 13, 14, 15

Wheel Grade 

This is generally a measure of 'hardness' or bonding strength of the wheel. For a wheel of a particular bond type, the amount of bond used in the wheel mainly determines its hardness. When the amount of bond is increased, the size of the bond posts connecting each abrasive grain to its neighbours is also increased. The larger bond post is naturally stronger, thereby increasing the wheel's hardness.

Grade is therefore not a measure of the hardness of the abrasive material but of the durability of the wheel. A hard abrasive can be bonded into a 'soft', free cutting wheel by using less bond, while an increase in the amount of bond can make the wheel act harder. Wheel grading range from 'D' for the softest, to 'Z' for the hardest.

The grade refers to the harness or strength with which the bond holds the abrasive grains of a grinding wheel in a place.

The Grade is indicated by the English alphabet A to Z.

A denotes Softest and Z denotes Hardest Grade.

The different grade of the grinding wheel as follows:

Soft A, B, C, D, E, F, G, H

Medium I, J, K, L, M, N, O, P

Hard Q, R, S, T, U, V, W, X, Y, Z