Floor and Power Equipment

portable drills are rated by?

their chuck size

The chuck on portable drills vary from what sizes?

1/4” to 3/4”

what smaller sizes of chuck may come equipped with a keyless cuck?

1/4” and 3/8”

the three jaw chuck on drills is called

jacobs chuck

Heavy duty drills typicall have a chuck sizer of?

1/2” or larger

Three main parts of the Twist Drill?

The Point, The body, and the Shank

A twist drill is held by its shank, the two types of shanks are?

straight shank and taper shank

the body of the twist drill has two flutes (grooves) cut into them. these grooves?

carry chips up and out of the hole.

The diameter of the twist drill bit is measured across its?

Margins (raised section of the drill bit)

What is a rule of thumb when choosing drill bits point angles?

For soft material choose sharper then 118 degrees

for hard material choose flatter then 118 degrees

and for general prupose choose 118 degrees

When drilling into concrete what type of tip should you use?

Carbide tip

What is the most common type of teeth for hole saw bits?

Alloy steel body with high speed teeth, they cut wood, plastics and many types of metal.

The circular saw cuts in a upward rotation, which means?

when your cutting the good face of the material should be facing up.

most common sizes of circular saws?

7 1'/4” and 8 1/4”

With the jigsaw the cuts can be either on the upstroke or down stroke depending on the?

The blade type determines the cutting action. Take this into account when maintaining the good side of the material.

What is the main purpose of the die grinder?

polishing deburring and smoothing sharp edges hard to reach.

Unishears are used when?

When the material you are trying to cut through is too thick to cut through with snips.

What is a disadvantage of the unishear?

The metal on one side of the cut line must be moved out of the way of the shear leaving that piece distorted.

How do nibblers function?

by a punching action that punches out small squares if metal called the kirf.

For full capacity use of the hand brake, what must be in place?

The angle bar

What does the noose bar achieve on the hand brake?

Adjusting the nose bar is done for different metal thicknesses. (if the metal is within four metal gauges of capacity of the brake move the nose back a distance equal to twice the thickness)

The box and pan brake is almost the same as a hand brake except what?

It has adjustable fingers that come in different widths instead of a solid nose bar making it it useful for bends the standard brake cannot

What are the characteristics of the electromagnetic brake?

Goes under the brand name Magnabend uses electricity to produce a magnetic force to bring down clamping members, known as keepers onto the metal to make complex bends the standard brake cannot perform.

The squaring Shear is used to?

trim or cut sheet metal to various sizes.

The bevel gauge on the squaring shear is useful for what?

It’s a short bar with a hole in it. This gauge can be used alone or with the front gauge when angle cuts are needed.

The noyes groover machine is used for?

To finish groove seams of various sizes, much quicker then working by hand.

Di-Acro hand manual bender is used for?

to bend various diameters of tubing and solid round bar stock up to 1” round mild steel.

The sensitive drill press cutting speed is?

The rate the edge of a tool moves through metal , measured in feet per minute or (meters per minute)

Cutting speed on a band saw is always expressed as?

Surface feet per minute (SFPM) or surface meters per minute.

What are two type of band saws?

Horizontal band saws and contour band saws also know as vertical band saws

What are horizontal band saws used for?

They are cut off band saws that cur material to length

What are vertical bandsaws used for?

for cutting complex profiles that cannot be produced by other types of metal working saws.

horizontal bandsaws are sized by?

The largest size they can cut

What is the space between the tool rest and the grinding wheel on a pedestal grinder of floor grinder

1/8” or 3mm

What are blotters when referring to a grinding wheel and what the essential function do they have?

• they protect the flanges from the abrasive frit of the wheel

• they compensate for uneven surfaces of the wheel

• they display valuable information including (safe rpm, size of wheel, type, grit and grade of wheel.

What is dressing or truing?

dressing is the operation of cleaning or restoring the sharpness of a wheel that has become glazed or loaded with foreign particles. Truing is the removal of material from the cutting face of a wheel so that the resultant surface runs flat parallel or concentric with it’s axis figure.

What does the press brake perform?

forming and bending and completing medium to high runs for all gauges of metal. the press brake utilizes several type of punches and dies to form the metal.

what is another name for the press brake?

power press brake or power brake

press brakes can use manual funtion to bend or?

CNC ( computer numerically controlled)

Like a foot shear power shears operate how?

having a top blade and a fixed bottom blade that cuts metal like a pair of scissors

spot welders are used to?

fuse metal together by clamping two electrodes together or welding tips and passing current through them. Also know as resistance welding.

How do plasma cutter operate?

by sending an arc through gas (typically air) that is passing through a constricted opening

And advantage of using a plasma cutter?

can cu any electrically conductive material faster, cleaner, and safer then many other cutting methods

Something to keep in min when using a plasma cutter?

The edges of the plasma cut are hardened and will cause damage to shearing and forming equipment

Slitters are used for?

cutting specific widths of metal off long lengths of sheets that cannot fit into the shear

The Transverse Duct Machine (TDC) machine does what

has auxiliary rolls to form the optional clips for the TDC joint as well as other roll options required by the individual shop.

What function does the Tripex Cleat Former perform

The main use is to make slip and drive cleats.