Carbide inserts are replaceable and usually indexable bits of cemented carbide used in machining steels, cast iron, high temperature alloys, and nonferrous materials. Carbide inserts allow faster machining and leave better finishes on metal parts. Carbide inserts can withstand higher temperatures than high speed steel tools.

Cemented carbides are composed of a metal matrix composite where carbide particles act as the aggregate and a metallic binder serves as the matrix. The process of combining the carbide particles with the binder is referred to as sintering. During this process, the binder eventually will be entering the liquid stage and carbide grains (much higher melting point) remain in the solid stage. The binder is embedding/cementing the carbide grains and thereby creates the metal matrix composite with its distinct material properties. The naturally ductile metal binder serves to offset the characteristic brittle behavior of the carbide ceramic, thus raising its toughness and durability. Such parameters of carbide can be changed significantly within the carbide manufacturer's sphere of influence, primarily determined by grain size, cobalt content, dotation, and carbon content.

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Carbide is more expensive per unit than other typical tool materials, and it is more brittle, making it susceptible to chipping and breaking. To offset these problems, the carbide cutting tip itself is often in the form of a small insert for a larger tipped tool whose shank is made of another material, usually carbon tool steel. This gives the benefit of using carbide at the cutting interface without the high cost and brittleness of making the entire tool out of carbide. Most modern face mills use carbide inserts, as well as many lathe tools and endmills.

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Recessed areas are included to accommodate the stock driver bit holder as best as possible. The drawers have ridges in the bottom which I had to design around; thus, I was limited with how much space I could provide. Whether the skin fits will depend on the length of the driver bits you want to insert into the holder. If you need to remove them prior to inserting the tool, there are extra storage spots included around the design as well as underneath where the tools sit.

This is a custom insert designed by Jonah Pope to fit your Milwaukee Packout Drawers to store your M18 Gen 4 Drill and Impact Driver. It specifically fits the Milwaukee 2 & 3 Drawer units (48-22-8443 & 48-22-8442), note belt hook details below…

BELT HOOK NOTE: If you use your M18 Gen 4 tools without the belt hook, you will be able to place the insert into the 3-drawer unit. If you use your Gen 4 tools with the belt hook, you will need to use the 2-drawer unit. Unfortunately, due to the distance the hook protrudes from the tool, it is not possible to fit the skin in the 3 drawer unit with the hook attached.

If your belt hook is on the same side as what is pictured above in the grid comparison photo (the left side) you will need to choose the “left sided” option. If your belt hook is on the opposite side of the tool, you will need to choose the “right sided” option. This ensures that your tool sits flat without the belt hook underneath which would prevent the tool sitting flat.

Check your belt hook clip side before choosing orientation Custom insert designed by Jonah Pope to fit your Milwaukee Packout Drawers to store your M18 Gen 4 Drill and Impact Driver.

To increase the life of carbide inserts, they are sometimes coated. Four such coatings are TiN (titanium nitride), TiC (titanium carbide), Ti(C)N (titanium carbide-nitride), and TiAlN (titanium aluminum nitride). Most coatings generally increase a tool's hardness and/or lubricity. A coating allows the cutting edge of a tool to cleanly pass through the material without having the material gall or stick to it. The coating also helps to decrease the temperature associated with the cutting process and increase the life of the tool. The coating is usually deposited via thermal CVD and, for certain applications, with the mechanical PVD method at lower temperatures.