You should now be able to select plus/minus and then the box will give you options general\broken edge\shaft\hole from there you can select H6 or whatever you need.

A compression bit can be a little more expensive than standard router bits, however here at AXYZ we recommend them as an essential tool when processing double laminate wood materials.

By combining both geometries, you achieve a win/win situation. The bottom of the material is pulled upwards while the top of the material is pushed downwards thus eliminating the risk of damaging the laminated surfaces. When run at full depth, the bit leaves a sharp, clean edge on both sides of your workpiece.

k finding a reliable supplier in China. It can be very difficult. I just had some aluminum prototypes made by a company I found on Alibaba and the tolerances were not even close to being correct. I was very specific and clear about the tolerances that I wanted and how the parts should fit together. However, when the parts arrived they would not fit together and were all about +/- 0.5mm or worse. I am sure there are better suppliers out there, just be skeptical of anything they tell you.

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While compression bits are the tool of choice for cutting double side laminates, it’s essential you use the tool correctly.

CNC routers need bits. They determine the kind of processing you can do, the resolution of your finished designs, and how fast you can move through the material. They come with cutting edges that pull up or push down (sometimes both), they have square or shaped ends, they are made for speed or accuracy, and they come in diameters from a pinpoint to over two inches for standard CNC routing.

tolerance table_dir = 'you'll need to work this out for yourself' (creo install directory probably) look for *.ttl* files

Author: Abdullah Umair is an application specialist for AXYZ, a global manufacturer of CNC router and knife systems. Abdullah has covered many areas during his spell at AXYZ to ensure he has gained holistic exposure to both the needs of customers and the functionality of the machine.

The cutting edge of most tools are on the side of the tool, therefore a direct plunge into the material will be fine for your standard upwards tool as the waste material is lifted out of the cut line and into the extraction system.

A dedicated up or downward spiral may only give a good finish on one side of the material if the material is laminated. Where both sides of the material require the best possible finish, a compression bit is your best solution.

If it's "add1", then it should work.  If it is a "d1", then you need to load the hole tables into the model and assign the fits to the model dimensions.

I'm not sure - because you use Creo 4.0 (I'm on Creo 2.0), and also I'm guessing from your screenshot: but you seem to be loading the tolerance tables into the drawing?  And the dimensions you are concerned with - are they "shown" dimensions, or are they drawing annotations?

A compression bit is the combination of both upcut and downcut spirals. Typically, a compression spiral has an upcut single, double or triple flute at the tip of the cutter, approximately one third of the cutting length. The remaining two thirds is ground to give a downcutting shear.

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However, for downward spirals and/or compression tools, it is best to ramp into the material. This approach stops the swarf from compressing at the bottom of the tool and causing extreme levels of heat. This heat will damage the cutting edge of the tool and the work piece.

Compression bits are used extensively for cutting double side laminates such as melamine or plywood. These tools can also be used on natural woods where edge finishing is a problem with standard spiral tools.

I am having trouble figuring out how to get the tolerance tables to work.  I am not able to select hole or any of the values.