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Пълна версия: What is Grooving Operation & Tool in Lathe Machine – How to Groove on CNC Lathe?
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What is Grooving Operation & Tool in Lathe Machine – How to Groove on CNC Lathe?

    Turning lathe is a type of versatile machine to complete a variety of operations on workpieces, to produce different details and change the dimensions, here we’ll introduce  what is grooving operation in lathe, how to choose and set up the grooving tool, difference between groove and slot, and how to groove on CNC lathe.

    Grooving is a type of specific turning option that cut grooves or forms a narrow cavity of a certain depth on external, internal surfaces, cylinder, cone, or a face of the part (face grooving or trepanning). Grooving is a machining process performed on CNC lathes, the shape of grooves or the majority of grooves will be related to the cutting tool shape. There are three typical types of groove: OD grooves, ID grooves and face grooves, which affects the use of the grooving tool.

    Grooving tool usually is a carbide insert mounted in a tool holder, can be used to cut external or internal grooves, and many other machining operations. There are multiple designs of grooving inserts, like a single tip or several tips for different configurations. Grooving tools with more tips can reduce costs and improve productivity. For specific groove types, OD (outer diameter) grooving works best when the tool tip held below the center line slightly. The ID (inner diameter) grooving get optimal performance when the tool top above the center line. In face grooving, the tool needs to be held slightly above center line and move in an axial direction, the clearance radius on the tool must match the radius being cut.

    1. Generally, a groove is blind while slot may be through.

    2. Grooving is often worked with round parts, while slot machined on rectangular plates.

    3. Groove usually in cylindrical cutout, slot tends to be a flat and narrow hole with straight edges.

    4. Slot is stretched in one direction and usually has complete radius on both ends with round or non-round edges, slot often cut into a flat plate or to the axis of a cylinder, grooves are cut around the OD or ID of a cylinder and do not pass through the axis of the cylinder, could have curves.

    What are milling inserts?

    Milling is the manufacturing of metal products using inserts to remove material from a workpiece. The variety of shapes and sizes determines the cutting or removal of these materials from the object. This is why the quality of inserts are as important to the machinery as well as the workpiece.

    Most beautifully finished metal products that are available for everyday use or production have been smoothed or finished by a metal milling insert. Milling inserts are replaceable bits that are used to machine tough some of the toughest materials. Some of the materials that they shape or cut are steel, stainless steel, cast iron, non-ferrous materials, Titanium, hardened steel, and plastic.

    These inserts are generally made of carbide, which allows them to be durable at extremely high temperatures and during high-speed applications for tasks such as drilling, hole making, finishing, etc.

    Once limited to basic shapes, optimizations by manufacturers now allow for a wide variety of milling insert geometric styles that are referred to as elliptical, frustum and helical. Each shape is specific in size, figure, and tolerance determined by the temperatures, elements, and manufacturing task that are required of it.

    Some features that will be important to consider when purchasing inserts are:

            Teeth, which actually cuts the material
            Flutes, which are the grooves between the teeth
            Coating, which impacts the cutting process and tool life
    What are the benefits of inserts?

    There is a monumental amount of force placed on a milling insert while it’s at work. This use of an insert will:

    Ensure safe and precise machining

    Provide high metal removal rates in challenging conditions

    Increase tool life

    Provide reliable performance in dry and wet machining

    The advantages of deep drilling with indexable inserts

    Even in deep drilling with single-lip drills, both when boring and drilling, the trend is moving towards tools with indexable inserts. The range of advantages is vast compared to soldered tools, with improvements in bore quality and performance being particularly noticeable.

    For holes with depths starting at about 20 x D, single-lip drills are clearly superior to other drilling tools. The gradients are lower, the surfaces of significantly better quality. These are important reasons why this type of tool is often used for applications with less deep bores, but the highest quality requirements. Experts refer to this as “precision drilling.”  The quality can be increased even further if single-lip drills with indexable inserts are used. This fact often remains unknown because indexable inserts are not nearly as common in deep drilling as, for example, in milling, turning or short-hole drilling.

    “Single-lip drills with indexable inserts have both  performance and quality benefits,” says Dr. Thomas Bruchhaus, tool expert at  TBT Tiefbohrtechnik  in Dettingen/Erms. “If only one of these aspects is important to the user, we recommend indexable inserts with single-lip drills. And this is happening more and more often, because the cost pressure and the demands on the quality of the cutters are constantly increasing.”

    While the quality of the bore is of less importance than machining time for cooling or lubricating bores in the field of mould-making or the automotive industry, the plastics industry, for example, attaches great importance to extremely smooth surfaces. Both requirements can be fulfilled very well by the insert-type single-lip drill.
As a full-service provider for deep drilling, TBT has continued to expand its tool range in recent years. Single-lip drills with indexable inserts for full boring are currently available from a diameter of 12 mm. With small diameters, there is no space to clamp the indexable inserts and guide strips; as such, these are still manufactured exclusively with soldered cutting edges. Drilling with single-lip drills is a less common type of machining; the tools are almost always made by TBT according to customer requirements.

    How to Replace a Gear Shift Knob

    The gear shift knob in a manual transmission equipped car or light truck is the large knob, usually made of plastic, that attaches to the top of the gear shift lever. Over time the surface of the knob can wear and you might wish to replace it to spruce up the interior of your vehicle. Many aftermarket manufactures offer specialty gear shift knobs. Some of these are made out of exotic materials such as leather or billet aluminum. Some companies offer novelty gear shift knobs for owners who want to personalize the interiors of their vehicles.

    Locate the gear shift knob attached to the end of the gear shift lever. Gear shift knobs are usually mounted in one of two ways. There will either be threads machined into the gear shift lever that the knob screws onto, or a small screw (usually an Allen head screw) at the base of the knob that secures the knob to the shift lever.

    Turn the knob counterclockwise or remove the screw at the base of the knob to remove the knob from the shift lever.

    Install the new knob on the shift lever by threading it clockwise onto the shift lever or sliding it onto the shift lever and tightening the screw to the base of the knob.

    What Wood Types Are Commonly Used For Knife Scales?

    Hardwoods make the best choice for knife scales because they are durable. They can maintain thin sections and fine curves like flutes and finger grooves without chipping, splintering, or breaking. When selecting a wood, look for close-grained options that will resist staining and contamination.


    Walnut is used for practically everything: furniture, kitchen fixtures, gun handles, and more. However, if you plan to use it for knife scales, it’s a better choice for one-of-a-kind display pieces that get little use. Although elegant in appearance, walnut is not as stable as other woods, so it’s not the best option for a knife you plan to use regularly.


    Oak is a highly popular choice for knife scales, and it’s easy to see why. It’s affordable and results in a beautiful, durable, and stable handle. Because oak is so effortless to work with, artisan knifemakers will often add inscriptions or designs to the finished handle to boost its aesthetic value. Its unique combination of affordable price and resilient composition makes it an ideal choice for utilitarian projects like kitchen or hunting knives.


    Like oak, rosewood is a cost-effective knife scale material. It varies in shade from golden brown to a deep, purplish hue and darkens with age, making it look deep and luxurious when polished.   Rosewood has a sturdy composition that makes it suitable for the most demanding uses. Many knifemakers prefer Indian rosewood because of its rich coloration and resistance to all types of contaminants- even termites!


    Olive wood, which originates in Europe and Eastern Africa, is a yellowish wood with darker brown or black streaks. Like rosewood, the color deepens with age. The most common uses are veneer manufacturing, turned objects, and specialty wood pieces. Although olive wood is prone to insect infestation, you can avoid this problem by maintaining your knife regularly.


    Ebony is a beautiful, luxurious wood with a rich darkness that puts it in demand for everything from luxury furniture to upscale knives. Consequently, it’s pretty expensive, but the stylish results and resilient performance makes it worth the price, especially if you want to make a knife that collectors will be eager to buy.


    Amboyna is one of the most expensive woods you can use for a knife handle, but in terms of beauty and functionality, you will definitely get your money’s worth. It is solid, stable, and resists oxidizing. Although strong enough to be used on everyday knives, the price tag makes amboyna more appropriate for artisan knives that get little wear.