Intro to Power Tools

Ag Mech I

Class Notes

Objectives

• AM15.01 Explain how power tools are used in agricultural mechanics.

• AM15.02 Know and demonstrate how to use agri. mechanics tools

properly and safely.

Power Tools

I. Intro to Power tools and Use

A. General Safety Rules

1. Care should be taken to use guards and to keep hands and clothing away from cutting parts of tools and equipment.

2. All safety procedures covered should be followed.

Power tools

• B. Tools and Their Uses1. Band Saw- use and rules

a. Keep fingers AT LEAST 2 inches from blade at ALL time

b. DO NOT put fingers in front of blade

c. . Guard should be SLIGHTLY above the height of wood1). Un tighten by using back black knob- DO Not over tighten2). USE SIDE KNOB

TO RAISE AND LOWER

d. Cut short pieces from long pieces

Power Tools

e. Pieces that have been cut and are at blade-use extra piece to

push out -DO NOT use fingers

f. Short or sharp curves in wood require a narrow blade – ¼"

or less.g. To help prevent the wood from

binding, DO NOT use miter gauge and rip fence

at same timeh. A band saw used to cut metal

must have a speed control that will slow the blade speed, and a metal cutting blade must be used.

Power tools2. Drills- Cord and cordless

a. How to use1. Variable speed2. Forward and

reverse3. Torque pressure4. Types of chucks- holds bits a). Key-remove before using b). Keyless5. Putting bit in

chuck-tighten before using

6. Battery care

Power toolsb. A center punch should be used to

dent the metal before starting to drill a hole in metal.c. The bit should be tight in the chuck,

and the chuck key removed before using a drill.

d. Size of drill- determined by the shaft size of the drill bits

used1). Example- 3/8 “= largest

shaft of drill bit used is 3/8”e. Hammer drill is used to drill holes

in masonry f. Drill press is a stationary tool used

to make round holes in wood or metal using a bit.

Power tools3. Portable Grinder

a. Size determined by diameter of blade

1. Blades made for metal & masonryb. Use ear plugs and face shield c. Operator should use both hands with a circular grinderd. Have the guard between

you and wheel e. Check power cord before using for nicks or cuts- electrical tape f. It is unsafe to use a grinding wheel after one half its original

diameter is worn away.g. Stationary grinder- Abrasive or wire wheel

-used to sharpen and shape metal

Power tools4. Sanders-Belt, palm and finishing

a. Size based on part of sand paper1). Belt- Width and length

b. Belt sander requires operator to use both hands.

c.. Belt should be turning before it is gently touched to the wood 1). Move with the wood grain until

it is lifted from the wood, still running, when finished.

d. After use, a belt sander should be laid on its side.

e. A finishing or pad sander should be used to sand with the grain to get a smooth finish.

f. Putting paper on palmg. Putting belt on Belt sander

Power tools5.Compound miter saw is a cutoff type

saw used to cut angles and square cuts.

a. Parts1). Table2). Fence3). Blade a). Size of saw determined by

diameter of blade b). Combination saw blade

b. How to use1). Have wood marked before using saw2). Keep fingers and hand out of circle 3).Put wood tightly against fence4). Sight down blade and put blade on

waste side5).Hold wood with left hand a) Put longest part of wood on left side 6).Raise handle up, pull trigger and cut 7). When cut release trigger and raise blade

Power Tools

6. Jig saw (Sabre saw) uses a back and forth (up and down) motion blade

to cut curves. a. Blade types

1). Wood 2). Metal

b. Clamp wood downc. Put both hands on sawd. Start saw off wood

Power Tools

7.Router is used to make molding or designs in wood surfaces, dado cuts, and rabbet cuts.

a. Use different bits to make different cuts

1). Molding2). Grooves and slots

b. Hold router with both hands off woodc. Start router and slowly move into

wood

Power tools

• 8. Jointer- used to smooth edges of boardsa. The depth of cut should be about 1/16"

each pass.b. The last pass on each edge of the board

should be with the grain for a smooth cut.9. Planer- used to smooth top and bottom

a. Nails, dirt and loose knots should be removed before the board is planed.

b. The thinner end of a rough-cut board should be put in the planer first.

Power tools

10.Portable Sawsa. Portable circular saw (Skil saw)

. 1. Operator should use both hands with a

circular saw.2. Used to make straight

cuts in wood.3. Saw teeth should point

toward front of saw used to cut wood.11. Radial Arm Saw

a. The wood remains stationary on the saw table, and the saw is pulled to the wood.

Power Tools

• 12. Table Saw

a. To get the correct

board width

1. Measure from

side of fence nearest saw blade to the saw blade tooth

nearest the fence.

b. Install the correct blade with the teeth pointing toward the

direction of rotation of the saw

Power tools

13. Abrasive cutoff saw (metal cutting chop) uses

a circular blade to cut metal.

14. A nail gun is used to drive nails

using air (pneumatic)

15. Reciprocating saw- Used in tight

situations