You can secure the drill rig by use of a vacuum system, a jack screw or a mechanical anchor.
Ensuring a perpendicular hole can be attained by having a small level permanently attached to the column or utilizing a magnetic strip on the level.
Base leveling screws can be used to level the drill rig itself.
Always apply pressure while allowing the bit to spin.
Segments of the bit can glaze over and overheat without applied pressure and can also cause diamonds to round off.
Before starting the drill motor, always start the water.
If you don't have the water on, the water jacket seals can become brittle from the heat which will cause water loss.
If your bit hits steel rebar, never push the bit.
Instead, relax your pressure around 1/3 to 1/2 and allow the bit to cut at its own rate.
If drilling a very hard aggregate such as high PSI concrete, flint or river rock, the bit can glaze over.
If you need to redress or open the bit, you can employ the following measures.
Drill the bit into a cement block, cinder block or a soft, vitrified grinding wheel.
You can also pour masonry sand into the slurry, decrease your water by half for 3-5 minutes and, as the bit increases speed, increase the water flow until it reaches its original non-glazed state.
You can follow these procedures while also adding a sandblast media like "Black Beauty" to the slurry.
Using these procedures singly or in combination should solve your bit glazing problems.
Turn your water down very low when finished drilling.
Make sure to back the core bit out of the hole while the motor is still running.
If you're segment is cracking, your bit may be too hard for that particular material or your machine setup isn't rigid enough.
Check your vacuum system, increase RPMs, use a softer bit or tighten the anchor to remedy your cracking problems.
If you're experiencing segment loss, your bit may be too hard for that material.
Use a softer bond and, if possible, increase motor RPM.
If you're seeing loose material in the cut, bit segment hanging or machine setup is not rigid enough, check your vacuum system for proper pressure and tighten your anchor.
Again, using a softer segment bit will resolve the issue of the segment being too hard for that material and, if you're getting an unwanted amount of high feed pressure, simply back off your pressure.
If you're experiencing overheating, it's usually the result of an insufficient volume of water to flush and cool the drilling of the segment.
Increase the flow of water until the slurry becomes milky and then it will flow much more easily.
Of course, it's always a great idea to review pertinent literature accompanying your diamond core bit and prepare yourself for unwanted problems by reading and keeping handy guides such