Machining Epoxy Granite

Epoxy granite is your best bet but what epoxy granite is the best.

Machining epoxy granite.

The only machines use. Epoxy granite sometimes known as polymer concrete makes an amazing machine base. I did a fill on my original rf 45 cnc mill and it noticeably improved the performance. Epoxy granite makes an amazing machine base but there is a bit of work that goes into it.

All done in my garage with a very basic set of tools. The epoxy granite is a mixture with epoxy and gravel filler with different grain sizes. Epoxy granite filling a mill for vibration dampening and rigidity. It s broken into 4 parts.

German epoxy granite milling machine here s an awesome project i recently heard about on cnczone. The epoxy granite mixture being used is 30 granite gravel 30 joint sand 30 fine quartz sand. This is a full tutorial on how to achieve fantastic results. That machine is solid.

The sizes are chosen to make the most possible dense gravel mixture. Filling the machine castings with epoxy granite with epoxy granite sometimes also called polymer concrete has been a time honored tradition of some of the finest machine tool manufacturers such as hardinge with their proprietary harcrete and others. That s the question adam bender answered in a series of experiments that resulted in a great looking cnc machine. Read all about how to do it in my article on epoxy granite fills.

Hardinge as well as many of these others are quick to point out. One important thing is to make sure that the mold lies flat on a reference surface. Epoxy granite fills are fascinating. Stiffness and damping are important to cnc work.

If the machine frame bends too much when cutting forces are applied. It can be cast into almost any shape is incredible stiff and dampens vib. I few details i gleaned from one of the articles on the german site you have to register. Mostly time laps recording of the build process of a little epoxy granite router.

This saves expensive epoxy and it makes the machine heavier and more stable.