Difference between revisions of "Power Tools"
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== Circular Saw Safety ==
== Circular Saw Safety==
Revision as of 19:42, 25 July 2017
OSHA 3080 defines a power tool as any tool requiring external electrical, pneumatic, or chemical power to function.
1. Wear safety glasses at all times upon entering a lab situation.
2. Check wood stock for defects before cutting, such as knots, cracks, and foreign objects . 3. Plan sawing procedures so there is a maximum of forward feed and a minimum of backing out.
4. Cut only flat stock whenever possible. When cutting dowels or other round stock, use approved holding device and get permission for this special setup.
5. Be sure the saw blade is the proper width for the job being done.
6. Blades are different widths and may require relief cuts to be made when cutting small radius curves.
7. Hold any wood firmly on the table and not up off the table.
8. Set the upper blade guide ¼” or less above the wood to be cut.
9. Always keep fingers out of the path of the blade and a safe distance from the blade.
10. Feed material into the blade at a moderate rate of speed.
11. Allow the machine to come to a complete stop before backing out of a long cut. Do not back out of a cut with the machine running. This can pull the blade off of the wheels.
12. Turn off the power after using the band saw and stand by until the machine has come to a complete stop.
13. Keep the table clear of scraps and clean table of scraps after the blade stops moving. Never pick pieces of wood from the machine while it is in motion and then it is wise to use a push stick or brush.
14. Make all adjustments while the machine is off and stopped.
15. When handling long pieces of wood, get help and do the pushing yourself.
17. When operating the machine, keep well balanced and stand carefully to avoid injury from unexpected slips or falls.
19. When a band saw blade breaks or comes off the wheels, step away immediately, shut off the power without endangering yourself, and then notify shop personnel.
19. Always keep clear of the area to the right of the band saw when it is being used because if the blade breaks it may whip out into this area.
20. Check the blade for cracks or splits before using the band saw. If a crack is found, unplug the machine and notify shop personnel.
21. Listen for tell-tale sounds as you cut. A clicking sound may mean a cracked blade.
22. When making adjustments it is a wise practice to unplug the machine to avoid accidental starts.
23. Turn on the dust collection system and close all gates, except that for the band saw.
Drilling machines, or drill presses, are primarily used to drill or enlarge a cylindrical hole in a workpiece or part. The chief operation performed on the drill press is drilling, but other possible operations include: reaming, countersinking, counterboring, and tapping.
1. Prior to drilling a hole, locate the hole by drawing two crossing lines. Use a center punch to make an indentation for the drill point to aid the drill in starting the hole.
2. Select the proper drill bit according to the size needed.
3. Select an appropriate size center drill.
4. Select a cutting fluid when necessary.
5. Properly secure the workpiece to the table.
6. Select the correct RPM for the drill bit. Take into account: size of bit, material, and depth of hole to be drilled.
7. Use an interrupted feed, called peck drilling, to break up the chips being produced.
8. Pilot holes should be used on holes larger than 3/8” dia. Holes are to be enlarged in no more than 1/4” increments.
9. Clean the drill press and surrounding area when finished.
1. No attempt should be made to operate a drill press until you are certain you understand the proper procedures for its use.
2. Dress appropriately. Remove all watches and jewelry. Safety glasses or goggles are a must.
3. Plan out your work thoroughly before starting.
4. Know the location of the OFF button.
5. Clamp all work securely to the table.
6. Always remove the chuck key immediately after using it. A key left in the chuck will be thrown out at a high velocity when the machine is turned on. Never let the chuck key leave your hand except to put it back into its holder.
7. Never stop a drill press spindle with your hand after you have turned off the machine. Chips often build up around the chuck.
8. Use a brush, not your hands, to remove chips from the machine. Do not clean up while the machine is running.
9. Remove burrs from drilled workpieces as soon as possible.
10. Keep the floor area clean. Immediately wipe up any oil spills.
Circular Saw Safety
1. Always wear eye protection when operating circular saws.
2. Tie up loose clothing and hair, and remove jewelry that could be pulled into the saw. Hearing protection is also recommended as saws are very loud and can lead to hearing loss.
3. Verify that the saw blade or abrasive cutting disc has a RPM rating ABOVE the saw RPM.
4. Set the saw cutting depth as shallow as possible – avoid letting the blade protrude much below the stock being cut.
5. Never set a circular saw down unless the blade has stopped.
6. Make adjustments and change blades only when unplugged.
7. Do not hold or force the retracting lower guard in the open position.
8. Do not place hand under the shoe or guard of the saw.
9. Do not over tighten the blade-locking nut.
10. Do not twist the saw to change, cut or check alignment.
11. Do not use a saw that vibrates or appears unsafe in any way.
12. Do not force the saw during cutting – forcing can cause kickback.
13. Do not cut materials without first checking for obstructions or other objects such as nails and screws.
14. Do not carry the saw with a finger on the trigger switch.
15. Do not overreach and make sure to keep proper footing and balance.
16. Do not rip stock without using a wedge or guide clamped or nailed to the stock.
17. Make sure the stock will not fall and “bind” the circular saw – kickback can occur.