instructor: james thornburgh unit 2 threaded fasteners bring up your homework & put on table
TRANSCRIPT
Instructor:Instructor:
James ThornburghJames Thornburgh
Unit 2Unit 2Threaded FastenersThreaded Fasteners
Unit 2Unit 2Threaded FastenersThreaded Fasteners
Bring up your Homework & Put on TableBring up your Homework & Put on Table
ObjectivesObjectives Define keywords related to Threaded Define keywords related to Threaded
FastenersFasteners List the three classes of fitList the three classes of fit Describe the differences between course, Describe the differences between course,
fine, and extra fine threadsfine, and extra fine threads Describe the difference between single Describe the difference between single
and multiple thread fastenersand multiple thread fasteners List the common information contained in List the common information contained in
a thread notea thread note
ObjectivesObjectives List and identify three different methods to List and identify three different methods to
graphically represent threadsgraphically represent threads Identify and draw different types of screwsIdentify and draw different types of screws Describe the difference between rivets and Describe the difference between rivets and
screwsscrews Draw pipe threads, hex and square bolts Draw pipe threads, hex and square bolts
and nutsand nuts Use thread tables to specify or draw Use thread tables to specify or draw
threaded fastenersthreaded fasteners
Class of fitClass of fit 11
Loose fitLoose fit For quick assemblyFor quick assembly
22 High QualityHigh Quality General purposeGeneral purpose
33 Very High QualityVery High Quality High Precision, stress, or vibrationHigh Precision, stress, or vibration
Thread PitchThread Pitch Determines how far a Fastener goes Determines how far a Fastener goes
with each revolutionwith each revolution
Thread TableThread Table
http://www.littlemachineshop.com/Reference/tapdrill.phphttp://www.littlemachineshop.com/Reference/tapdrill.php
Drawing ThreadsDrawing Threads DetailedDetailed
Show detailed thread formShow detailed thread form Time ConsumingTime Consuming Rarely used Rarely used
SchematicSchematic Easier than DetailedEasier than Detailed
SimplifiedSimplified Easiest to drawEasiest to draw Used most oftenUsed most often
Fastener TypesFastener Types BoltBolt
Hex or Square HeadHex or Square Head Used with a nut to Used with a nut to
Squeeze parts Squeeze parts StudStud
Threaded into a PartThreaded into a Part Attached second Attached second
part with a nutpart with a nut Cap ScrewCap Screw
Longer than a boltLonger than a bolt Threaded to the Threaded to the
headhead Threads into partThreads into part
Fastener TypesFastener Types Cap ScrewCap Screw
Can have Socket Can have Socket HeadHead
Machine ScrewMachine Screw Smaller than Cap Smaller than Cap
ScrewScrew Many different head Many different head
StylesStyles Set ScrewSet Screw
With or without a With or without a headhead
Used to keep parts Used to keep parts stillstill
ReferencesReferences http://www.mcmaster.comhttp://www.mcmaster.com http://www.boltscience.com/http://www.boltscience.com/ http://www.Barnhillbolt.comhttp://www.Barnhillbolt.com http://www.fastenal.comhttp://www.fastenal.com