1. Mechanical Division Standard Hand Tools

2. Topics Design T-Square Drafting Triangle Fabrication Hacksaw Cordless Drill File Sandpaper & Steel Wool Assembly Wrench & Adjustable Wrench Allen Key Screwdriver Ratchet Caliper MVRT 115

3. Design

4. T-Square Used in conjunction with drafting board and triangle Allows drawing of horizontal lines Keep your T-Square clean and check to make sure it is straight MVRT 115 Examples of t-squares used in the art department

5. Drafting Triangle Used by sliding on top of T-Square Allows drawing of vertical lines Keep your triangle clean MVRT 115 Keep your triangle clean

6. Caliper Used for precision measuring of thickness and diameter Measures up to ten-thousandths (0.001) of an inch Useful for measuring shaft and hole diameters MVRT 115 A set of calipers similar to ours

7. Fabrication

8. Hacksaw Useful for cutting down long bolts & PVC Long smooth cuts versus short rapid spasms Be careful not to damage the blade Watch table edge and corner Angle downward for ease of cutting MVRT 115 A high tension hacksaw similar to ours

9. Cordless Drill Useful for drilling holes or tightening/loosening screws Dont 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 screws Try not to wear out screw heads MVRT 115 A standard cordless drill Click to continue

10. File Effective 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 continue A typical file

11. 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 aluminum High (220+) grit for finishing wood, plastic, and light work on aluminum MVRT 115 Continued on Next slide

12. 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

13. Assembly

14. 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 continue A WrenchAn Adjustable Wrench

15. 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 handle Replace Allen keys in proper sets MVRT 115 Your everyday set of allen keys

16. 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 tips Use proper judgment when selecting a screwdriver to avoid unnecessary head wearing MVRT 115 A screwdriver Click to continue

17. Ratchet Used 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/whatever Use proper judgment when selecting a socket head to avoid wearing To change socket heads, press and hold the release button on the back of the ratchet head MVRT 115 Continued on Next slide

18. 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 direction To change rotational direction, flip the switch on the back of the ratchet head to the other side of the head Remember to replace socket heads in their proper locations Some ratchet Click to continue Ratchet MVRT 115