C-2 Use Portable Power Tools

What degree does a power-actuated tool safety feature only fire at?

A power-actuated tool will not fire if its held at an angle greater than 7 degrees from the work surface.

How is a High velocity Power-actuated tool fired?

Gun powder cartridge fired at a velocity greater than 150 meters per second.

Speeds of 460 meters per second are not unusual.

Rank the Power-actuated cartridges from weakest to strongest.

Grey

Brown

Green

Yellow

Red

Purple

Name Prerequisites for the guidance system in power-actuated tools

The piston must match the fastener

The faster washer guide must fit snugly in the barrel.

The proper cartridge for the tool must be used.

What kind of test can determine if a material is suitable for fastening when using a power-actuated fastener?

A Center Punch test

Why must you avoid fastening to material such as cast iron, glazed tile, hardened steel, glass, natural rock and most brick?

Too brittle, has very little holding strength or can easy break.

Whats the thinnest measurement for material that can be fastened?

> than 75mm/ (3”) thick

What kind of material can you not fasten to?

At no time can you fasten to precast iron.

What should you consider when fastening to steel?

Fastener must be at least 50mm (2”) away from any weld or torch cut.

Fastener must be at least 13mm (1/2”) away from edge of steel.

What can i use to prevent injuries from chain breaks in chainsaw

Chain break guard at the rear handle and chain catcher under the clutch cover.

How can i readjust tension if necessary?

Loosen the guide bar mounting nuts about one turn.

What is the maximum size holes a hammer drill can make?

20mm ( 3/4”)

How much stronger is the rotary hammer than a standard hammer drill?

10 times

What diameter holes can a rotary hammer or large drill make?

50mm to 150mm (2” to 6”)

What is the purpose of Demolition hammers?

Chipping and Demolishing concrete.

Can also be used for tamping or scaling.

What is a bushing tool attachment used for ?

Its used to make decorative patterns on a concrete wall.

Expose aggregate.

How much HP does a walk behind saw have?

10 - 25 HP

How big do Walk behind saw blades range up to?

Up to 30” in diameter

What type of material do super abrasive disks use?

Diamond-impregnated metal blades

Cubic Boron Nitride coated blades (CBN)

What are some advantages of using superabrasive types of blades?

Less dust and longer blade life

What is the main advantage Abrasive cups

Tends to produce a smoother, flatter finish.

Used to grind large, open surfaces such as walls or floors.

What are Wire Wheels and Cups used for?

Used for cleaning irregularly shaped objects and to prepare metal for painting.

What is need when cutting through thick material with a router?

Bits with a 1/2” diameter shank are needed

Define collet

Router bits are attached to the arbor of the motor using a collet.

The collet is a tapered metal piece that is split.

What part of the bit can be used to follow the edge of the routed material?

Guide tip or bearing guide

What shank sizes do router bits come in?

1/4” or 1/2”

and a matching collet size

Why must a router speed be slowed down when using large diameter bits.

Safety and efficiency of work.

Taking off the more material.

What is usually equipped when using jigs or templates

Guide Bushings

How is a lap-joined sanding belt attached on a belt sander

Putting the belt on with the direction arrow pointing in the direction of the travel of the belt.

What is another name for dual-action sanders?

Random orbital sanders

What is considered course grit?

36 - 50

What is considered medium grit?

60 - 100

What is considered fine grit?

120 - 180

What is a similarity between a Power plan and a Jointer

The rotary cutting action

What is perfect alignment for a power plane table

The finished position of the knives must just touch a straightedge when it rests evenly across both infeed and outfeed table.