mechanical division
DESCRIPTION
Mechanical Division. Standard Hand Tools. Topics. Design. T-Square. Drafting Triangle. Caliper. Fabrication. Hacksaw. Cordless Drill. MVRT 115. File. Sandpaper & Steel Wool. Assembly. Allen Key. Wrench & Adjustable Wrench. Screwdriver. Ratchet. Design. T-Square. - PowerPoint PPT PresentationTRANSCRIPT
Mechanical Division
Standard Hand Tools
TopicsDesignT-SquareDrafting Triangle
FabricationHacksawCordless DrillFileSandpaper & Steel Wool
Assembly
Wrench & Adjustable WrenchAllen KeyScrewdriverRatchet
Caliper
MVRT
115
Design
T-SquareUsed in conjunction with drafting board and triangleAllows drawing of horizontal linesKeep your T-Square clean and check to make sure it is straight
MVRT
115
Examples of t-squares used in the art department
Drafting TriangleUsed by sliding on top of T-SquareAllows drawing of vertical linesKeep your triangle clean
MVRT
115
Keep your triangle clean
CaliperUsed for precision measuring of thickness and diameterMeasures up to ten-thousandths (0.001) of an inchUseful for measuring shaft and hole diameters
MVRT
115
A set of calipers similar to ours
Fabrication
HacksawUseful for cutting down long bolts & PVCLong smooth cuts versus short rapid spasms
Be careful not to damage the bladeWatch table edge and cornerAngle downward for ease of cutting
MVRT
115
A high tension hacksaw similar to ours
Cordless DrillUseful for drilling holes or tightening/loosening screws
Don’t even try to drill steel
Do not completely discharge the battery; it shortens its average life span
Use only when accuracy is not an issue
Avoid having to drill aluminum
Avoid over-tightening screwsTry not to wear out screw heads
MVRT
115
A standard cordless drillClick to continue
FileEffective at “making stuff fit together” by grinding down edges
Stay away from steel
File perpendicular to the teeth and away from yourself in smooth strokes
Absolutely not for precision parts
Use only on wood, Plastic, and aluminum
Can be used as an alternative to the de-burring tool for de-burring
MVRT
115
Click to continueA typical file
Sandpaper & Steel Wool A step down from the file in terms of grinding power
Generally use low (60-100) grit to start out wood and plastic
Use appropriate grit for material and amount to sand down
Absolutely not for precision parts
Higher grit = finer sand
Use medium (120-180) grit for working wood, plastic, and grinding aluminumHigh (220+) grit for finishing wood, plastic, and light work on aluminum
MVRT
115
Continued on Next slide
Steel wool is excellent for “persuading” shafts and other slightly-too-big parts to fit
Beware of the steel dust that falls off when polishing; they will make electrical unhappy!
Various grades of sandpaper Rolls of steel wool
Sandpaper & Steel Wool MVRT
115
Assembly
Wrenches and A. Wrenches Generally used in pairs to tighten bolts and nuts
Avoid using the adjustable wrench when possible; slippage causes wearing on the bolt heads and nuts
Use appropriate measuring system (metric or English/standard/whatever) to avoid wearing down nuts and bolt heads
Alternative to ratchet when space is an issue
MVRT
115
Click to continueA Wrench An Adjustable Wrench
Allen Keys Used to tighten and loosen socket-head bolts and screws
The ball-shaped end allows easy insertion to start off tightening
Comes in two flavors; Metric and English/Standard/Whatever
The flat end has greater potential for tightening torque due to long handleReplace Allen keys in proper sets
MVRT
115
Your everyday set of allen keys
Screwdriver Used to tighten and loosen Slot and Phillips head screws
Phillips is used for Phillips head screws
Slot, or commonly known as flat, is used for slot head screws
Wider-diameter Phillips screwdrivers generally have flatter tipsUse proper judgment when selecting a screwdriver to avoid unnecessary head wearing
MVRT
115
A screwdriver Click to continue
RatchetUsed to tighten and loosen Hex head bolts
Fast and easy way to loosen and tighten bolts
Generally used in conjunction with a wrench on the nut/bolt head
Socket heads come in metric and English/standard/whateverUse proper judgment when selecting a socket head to avoid wearingTo change socket heads, press and hold the release button on the back of the ratchet head
MVRT
115
Continued on Next slide
Then remove the socket, fit the new socket head on completely, and release the release button
Ensure the ratchet stop is set in the proper directionTo change rotational direction, flip the switch on the back of the ratchet head to the other side of the headRemember to replace socket heads in their proper locations
Some ratchetClick to continue
Ratchet MVRT
115