ISO insertnomenclature pdf

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However believe it or not, these actually mean something. So technically, if you scrub up on your ISO coding knowledge you will never need to check for part numbers again, and that’s exactly what we want you to learn in this blog post. In this blog we will look at the turning tool ISO code system, and then in a later article we will analyse the boring bar codes.

Turning insertidentificationchart

Following on from point 6, the width of the shank can be determined by part 7 of the ISO code. So in the example at the top of the article again, the width is 25mm as the code has the number 25 there.

A split point drill bit has two additional edges ground into the chisel edge, which make the entire point of the drill one long cutting edge. This reduces the amount of pressure needed to make the drill cut. This style is also self centering which means the drill starts cutting without the need of a pilot hole.

The gentler cut of the 135 degree point is because the flatter angle means the cutting edges come into contact with the hold more evenly and gradually than a 118 degree point.

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Exclusive to Busy Bee Tools, this new spiral cutterhead, with carbide inserts, is designed to fit the DW735 Dewalt Planer. This cutterhead is designed ...

In this article you will know what is a carbide turning insert? How to identify one, what are different types of carbide turning insert and much more.

The disadvantage of a 135 degree point angle is that the bit is more prone to walking around.  This is the flip side of more gradual even contact of the cutting edge.  You’re more likely to need a spot drill or at least to center punch the hole.  Grinding a split point can help to minimize this walking behavior.  Using a more rigid setup such as a drill press can also help.

Carbideinsertcodes explained

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So knowing the codes doesn’t just help you with the tool holders themselves but it also helps you find the inserts to suit. To the right is a chart showing the different cutting edges each insert has and what the lengths are based on:

Carbideinsert

The third part of the code is used to determine the style of turning tool. There are many different types which are all primarily based on the approach angle of the tool. These can be found below:

According to Drill Doctor, some years ago most twist drill bits were 118 degree but now the 135 degree split point drill bits are the most commonly used angle.  They say this was mostly a marketing ploy.

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There are 5 different clamping methods on turning tools, these can all vary depending on what insert is clamped, the shape of the tool and also have different levels of rigidity/clamping force. See the legend chart below for what types are available and how they clamp:

ISO insertgradechart

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Carbideinsertgradechart

The choice of which angle to use is largely based on the material being drilled.  The 118 degree point angle is more aggressive and is preferred for soft materials like wood on up to aluminum.  However, the 135 degree angle will give a gentler cut which is better suited to harder materials.  Using a 118 degree point angle in a hard material will result in excessive tool wear of your drill bits.

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The fourth letter of the holder code, which defines the clearance angle of the insert also matches the 2nd letter of the insert that is suited to it. There are various clearancve angles that are available, these can all be seen below:

This final part of the code recognises the length of the inserts cutting edge that is being used in the tool. So using the example at the top of the article, it has 12 at the end which signifies a 12mm cutting edge length. These numbers will also match the first two digits that are used in an insert. So with the example at the top of the article we now know using points 2, 4 and 9 we can find the insert to suit that holder, In  this case it would be SN**12 inserts.

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This part of the code signifies the length of the holder. Each letter has a different length and it can be one of the most important things to know when you’re chosen length isnt available. So knowing this can provide alternatives and can help you get your tooling quicker if you hit any problems with availability if taking a different length is suitable.

Insertdesignationchart

CARBIDEinsert Chartpdf

If you have a choice of which style to use, you should take advantage of that choice.  Our G-Wizard Calculator tells you the best drill point angle to use based on the material to be drilled.

If you are drilling deep holes, you will find parabolic flutes are extremely helpful.  See our article on deep hole drilling for many more tips.

Bob is responsible for the development and implementation of the popular G-Wizard CNC Software.  Bob is also the founder of CNCCookbook, the largest CNC-related blog on the Internet.

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This part of the holder code always matches the first letter of the insert that is suited to it. There are slight indicators as to what letter is for what shape, but these are only loosely based on the more popular shapes so shouldn’t be adhered to all the time, such as S= Square Insert, T= Triangle Insert and R= Round Insert, but that’s about as far as it goes in simple terms, please see below the legend chart for all Insert Shapes and the angles of them:

Turning tools have 4 sided shanks (as oppose to boring bars which are round) so the height of these can be determined on the 6th part of the code. In the example at the beginning of the article, it states the number 25, which means the height of the shank is 25mm.

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One of the most important aspects to your tool holder is the orientation – whether it is left hand, right hand or a neutral (centred) type. Having these options can allow you to cut in mutliple directions. Please see to the right a visual representation of turning tool hand types.