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Types Of Metal Grinding Process

Types Of Metal Grinding Process

In our prior post, we covered the fundamentals of grinding. In this post, we'll discuss various metal grinding processes. Let's start by explaining metal grinding.


Metal grinding is a procedure used to smooth out and finish metal objects. It is most used for sharpening edges, deburring, and bespoke edge finishes.

The use of bonded abrasives to create a grinding wheel is the method of removing metal through grinding. Each moving abrasive particle makes a tiny chip in the workpiece as it comes into contact with it. Contrary to popular belief, cutting actions are used just as frequently in grinding as drilling, milling, and lathe turning.


The four most common grinding processes used in industries are listed below.

  • Surface grinding
  • Cylindrical grinding
  • Internal grinding
  • Centerless grinding


The term "surface grinding," also known as "Heiken" or "Hiraken," refers to the use of either a vertical axis grinding machine or a horizontal axis grinding machine, along with a square table or a circular table, a straight type wheel or a cup type wheel.

To grind, the workpiece is mounted on a table, and the abrasive wheel is turned quickly. The double-ended kind has wheels above and below that grind the workpiece between them. The most common grinding technique, surface grinding, is utilized in a variety of industries.


Enken, or cylindrical grinding, is frequently performed on a universal or cylinder grinding machine. The cylindrical workpiece is mounted on the wheel, and its outer rim is machined. Straight cylindrical, tapered, end face and complete shape grinding are a few of the several ways of grinding. It is a generic grinding technique that is popular and similar to surface grinding.


Using an internal grinding machine, a cylindrical grinding machine, or internal grinding equipment connected to a universal grinding machine, one can do internal grinding, also known as Naiken.

The inner surface of the fixed workpiece is machined using a rotating axle wheel. Grinding can allegedly be done while the workpiece rotates. The grinding process comprises taper and end-face grinding, like cylindrical grinding.

Workpieces will be held in a three- or four-jaw chuck, and the chuck will rotate as the workpiece moves. The internal grinder spindle and internal grinder wheel will be connected. In order to thoroughly grind the interior surface of the workpiece, the internal grinder will both rotate and move transversely.


When processing the outer edge of a cylindrical workpiece with a centerless grinding machine, it is sometimes called Shinbashi grinding. Between a fixed blade, a spinning adjustment wheel, and a grinding wheel, a workpiece is supported. The workpiece's rotation and feed are then adjusted by rotating the adjustment wheel while grinding the workpiece's outer circle. A center hole in the workpiece is not necessary for centerless grinding, nor is the installation or removal of the workpiece from the grinding machine. It is excellent for mass production due to these characteristics.

The three basic types of centerless grinding processes are listed below.

  • THROUGH-FEED GRINDING – In through-feed grinding, the workpiece is fed axially by an axial force applied to it by the revolving surface of the regulating wheel. Because multiple things can be ground concurrently, the through-feed grinding method is highly productive.
  • IN-FEED GRINDING – In-feed grinding is different from through-feed grinding. If a workpiece is not perfectly circular but close, we will favor the in-feed grinding procedure since the grinding wheel can be dressed to the surface of the workpiece in this case. In the event of an in-feed grinding operation, the grinding wheel will be fed in a radial direction. Due to the lengthy preparation time required for in-feed grinding, it is less productive than through-feed grinding.
  • END-FEED GRINDING – The workpiece advances axially throughout the end-feed grinding process. The workpiece will stop moving while on the ground, then start moving again.



Narai grinding, or contour grinding is a technique that uses a profile grinding machine to form a workpiece into any shape.


Gear shaping is done with a gear grinding machine and is also called "Haken." The most common whetstones are those made with diamond abrasive grains and molded with a dresser (rotary dresser).


Using a toothed machine, form the thread by thread grinding.


The various types of grinders used for grinding metal include:

  • BELT GRINDER – uses an abrasive-coated belt to grind metal so that the surface is smooth.
  • BENCH GRINDER – It is a table top grinder that powers abrasive wheels for rough grinding of hand tools and other materials.
  • GRINDING CYLINDER – The outside surfaces of items are shaped with a cylindrical grinder.
  • SURFACE GRINDER – A finishing wheel made of abrasive material for flat surfaces.
  • BIT GRINDER – used to sharpen milling cutters and tool bits.
  • JIG GRINDER – used for intricate form grinding when precision and polish are crucial.

We hope this "Types Of Metal Grinding Process" post helps you see things clearly.

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