Anything in the world that spins has a little problem. This problem has many names, but in machining we call it runout. No mechanical system spins perfectly. Runout is the amount of inaccuracy in spinning mechanical systems. Runout is caused when the turning tool or shaft isn't in complete alignment with the main axis. While it may be a common problem that doesn't mean it is a small problem. Frankly, it is a huge problem. Thank goodness it is easily solved with a collet wrench.
TIR Measures Runout
When the drill chuck can't hold the bit dead center, it turns on a secondary axis as it rotates. This is secondary axis is runout. Total indicator runout (TIR) measures concentricity to determine runout. Runout refers to the spin in a specific location. To measure runout, press a dial indicator
against the rotating part as it turns. A dial indicator amplifies all variations. Through amplification, these variations become large enough to see with the unaided eye. The dial indicator takes any deviation from concentricity and makes it large enough to detect and measure. That's crucial for accuracy because you can’t adjust what you can’t measure. Measure what you can’t see is hard. But, if you can see and measure deviations, you can adjust for them.
How to Correct Runout on a Drill Press
Before you make yourself crazy, start with the basics. Sometimes all you need to do to correct runout on a drill press is simply clean it. Just fully open the jaws and use compressed air to blow them out. Just a single speck of debris in the jaws can cause runout. After cleaning, verify that the drill rod is true. Check the runout on the spindle and check the bearings on the spindle. Either causes runout.
Ranger RL 8500 Brake Lathe
How to Correct Runout on a Brake Lathe
Correcting runout on a brake lathe means taking care of the arbor. You must periodically inspect the arbor and spindle for rust or metal chip buildup. Use fine steel wool and a little WD40 to clean the arbor. Stay away from sandpaper and wire brushes. Removing metal only makse the runout worse. Check the spindle bearings. When the lathe is properly set up and the arbor is good, this is most likely the runout source.
Use a Collet Wrench to Protect Your Collets
Preventing runout is easier than correcting it. Collets that are too lose or too tight produce runout. Runout will also damage the collet over time. Use a collet wrench to tighten all three jaws evenly. Just slip the prongs into the collet top. Turn the wrench to thread the collet using the right amount of torque. So stop runout and get a collet wrench from The Tool Company
Get a Collet Wrench
The Tool Company collet wrench
has a concave face. Enjoy perfect alignment the first time every time
. The heft of the tapered handle is comfortable. The bright orange handle stands out. It's easy to find this wrench. Buy your collect wrench at The Tool Company and stop runout before it starts.