User:Jstapko/EngLab/toolcerts/HandDrill

Introduction
HCC has several hand held power drills, and experience has shown that this tool is used often. These are generally very simple to use, but there are a few things new users need to know to prevent injuries.

Warnings

 * Safety goggles are required when using this tool
 * gloves should not be worn when using this tool
 * Trying to hold the thing you are drilling with one hand while drilling with the other has a strong chance of causing injury if the drill slips; USE A CLAMP OR VISE to hold your work.
 * Using a drill bit not appropriate for the job can pull the drill in or slip out of the hole sideways, exposing the moving cutting edges, which can cause injury. (this is particularly a problem with spade bits and Forstner bits, use extra care when working with these)
 * Using dull drill bits in metal, or drilling with the wrong speed, can put excess torque on the drill bit, which can break it. The pieces can then fly across the room, injuring the operator or bystanders.  To prevent this, make sure your bits are sharp before starting.
 * Be considerate of other users. If a drill battery dies while you are using it, put it on to charge.  If you don't have time to monitor the charging (chargers in operation should not be left unattended), consult a lab assistant or professor.

Quick Start Guide

 * 1) put your safety goggles on
 * 2) Select a drill bit. Your basic choices in the HCC lab are:
 * 3) *twist drills (use these for metal, wood, certain plastics, most things)
 * 4) *spade bits (use these for wood only)
 * 5) *Forstner bits (use these in wood only, preferred over spade bits)
 * 6) *drill bit selection has been covered in greater detail on the drill press wiki
 * 7) clamp the drill bit securely in the chuck
 * 8) locate your hole and center punch it with a nail, or similar pointy object
 * 9) clamp you stock securely in the vise or to the table (if to the table, use a piece of scrap as a backing to prevent drilling into the table)
 * 10) if necessary, connect the battery
 * 11) use both hands to operate and guide the drill as needed
 * 12) watch for and avoid drilling items not part of your part, such as:
 * 13) *vise jaws
 * 14) *the lab bench
 * 15) When finished, put the drill and bit back where you found them, and clean up your chips.

Additional Resources

 * techedlearning.com's drill press page
 * HCC Drill Press wiki

Videos

 * Brittaney Bailey (generally excellent vid, but puts hand in front of drill bit a few times)
 * April Wilkerson demonstrates how to set up a Makita, like the one in HCC's lab. Does not wear safety goggles, and uses unsafe technique for inserting/removing drill.
 * Skil PowerTools Good discussion of setting clutch and other controls on a Skil drill. Uses hand to hold workpiece (safety hazard).
 * AcehardwareDC Doesn't wear safety goggles

Quiz
{What is the function of the clutch sleeve at the front of the hand drill, behind the chuck? -It controls the speed of the drill +It limits the maximum available torque to prevent breaking screw heads off when driving with power -It is to stop the chuck quickly in an emergency
 * type=""}

{Why is wearing gloves a bad idea when using this tool? -Drill bits can go through steel, so there's really no point +Gloves can catch on the drill bit or chuck,pulling your hand into it and causing an injury- -The gloves can inhibit your finger movement, reducing your ability to precisely control the drill's speed
 * type=""}

{What is the most important reason to avoid drill bit breakage?
 * type="[]"}

-Sharp points on broken drill edges can cut operator +Broken drill bit parts can fly across the room, injuring operator or others -Should make effort to avoid damaging or destroying school resources

{What steps can be taken to reduce the chance of drill bit breakage? +Select the proper drill bit for the material you are drilling +Inspect your drill bit's point and make sure it is sharp +Don't bend the bit by wobbling the hand drill when running it +Don't try to force your drill bit to drill faster than is suitable for the material and hole diameter
 * type="[]"}

{Why do you need to clamp the workpiece down when drilling it? -Doing so is good practice for when you need to clamp things to the drill press +If you don't, the drill can catch the part and spin it, which could cause an injury +Because holding the piece with your hand is very likely to result in drilling your hand
 * type="[]"}

{What should you do when the drill battery dies? -Leave it for a lab aide to charge +Put it on to charge -Notify a professor +When setting up charger, first plug the battery into the charger, then the charger into the wall, not vice versa
 * type="[]"}