fastener sk-kd 5

FASTENERS

Teknik Kendaraan RinganSemester 1st Class X

Dasar Kompetensi KejuruanSK-KD 5TH

DIAGRAM ALUR PENCAPAIAN KOMPETENSI

The Nuts and bolts we all use

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SYSTEMS OF THREAD MEASUREMENT

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ENGLISH SYSTEMSystem of thread measurement uses a fractional system to determine thread diameter when 1/4” or larger.Each diameter increases by 1/16” up to about 1/2” Thread diameters of 1/4”, 5/16”, 3/8”, 7/16” 1/2” are most commonly used

1/4 5/16 3/8 7/16 1/2

ENGLISH SYSTEMThese diameters are the most commonly used.

SYSTEMS OF THREAD MEASUREMENT

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METRIC FASTENERS SIMILAR TO ENGLISH SYSTEM THREAD DIAMETER IS

EXPRESSED IN MILLIMETERS (mm)

THREAD TYPE IS DIFFERENT THREAD SIZE IS DETERMINED BY

MEASURING THE DISTANCE IN MILLIMETERS FROM CREST OF ONE THREAD TO CREST OF NEXT ONE.

Example 1.00, 1.25, AND 1.50

Thread Designations for Metric

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To write out Thread designations for Metric bolts first you give the Diameter then the Thread Pitch then the Length. Only this time it should be in millimeters

D X TPI X L M12 X 1.50 X 60 You can always

add the Class (grade) of the bolt. Such as 4.8, 8.8, 10.8

Metric Recommended Bolt Torque

DiameterRecommended Torque (N*m)

Class 8.8 Class 10.9

5 7 96 12 168 30 40

10 55 7512 100 13514 160 21516 245 33520 480 650

STUD STRENGTH

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STUD REMOVAL

One way is to jam two nuts together and then put the Wrench on the inside one and turn it out.

How to measure a bolt

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A. Pitch C. Diameter D. Thread length E. Screw lengthF. Threads per inch G. Head size

THREAD PITCH

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From 0-1 shows that you have 7 TPI Threads per inch. (US standard)

Metric you measure the pitch, from top of thread to top of thread like # A

Thread pitch gauge

Used to find how many threads in an inch

come in metric and standard Screw pitch gauge common name

of this

Thread Designations

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To write out Thread designations for US bolts first you give the Diameter then the Thread Pitch then the Length

D X TPI X L ½ X 13 X 2 ½ Take a bolt and give me

the Thread designations for it.

You can always add the grade of the bolt. Such as grade 5

Thread Designations

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Next we measure the Thread Pitch.

D X TPI ½ X 13

Then we measure the Length. D X TPI X L ½ X 13 X 2 ½

Thread Designations for Metric

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To write out Thread designations for Metric bolts first you give the Diameter then the Thread Pitch then the Length. Only this time it should be in millimeters

D X TPI X L M12 X 1.50 X 60 You can always add the Class

(grade) of the bolt. Such as 4.8, 8.8, 10.8

SPECIAL FASTENERS

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This is a normalHex Head Cap Screwwith a flat washer andhex nut.

Bolts

Eye Bolts

Eye Nuts

WASHERS

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Washer is ………………………………………..

LOCK WASHERS

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Internal Tooth lock washerExternal Tooth

lock washerCountersunkSplitLock washer

SAEFlatwasher

USSFlatwasher

Fender Washer

Nuts

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Socket Head fasteners

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Machine Screws

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Tips

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Drywall

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Rivets, Pins & Clips

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Name the different clips

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Internal snap ring

Pal nutExternal snap ring

Grease Zerk

Blind RivetsWing Nut E-ClipSplit or Roll

PinHitch pin clip

CotterPin

Set Screw

Stud

Thin or Jam nut

Speed nuts Lock

nut

Thread lockers

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Anaerobic cures after the components are put together

Locks Bolts & Studs against Vibration loosening

Four colors Use on screws up to ¼ - Purple # 242 Able to Remove ¼ to 3/4" Bolts -

Blue # 271 High Strength Hard to Remove

3/8 to 1" - Red # 290 Wicking Grade for Preassembled

Parts - Green # could be different due to size of bottle

Clean and dry all parts removing dirt, oil, grease and/or any foreign material

BOLT PAINTING

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Many cars left the factory with painted bolts, nuts and other assorted fasteners.

The problem for the garage restorer is that these freshly repainted pieces chip and mar easily.

So do what the factory did: Bake the paint on. An old toaster oven is perfect for this task--just set the oven to 325 degrees and let the parts bake for a half-hour.

This process sometimes changes the color of paints

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BIBLIOGRAPHY:

PHS AUTO

Thanks very much

Presented by Aloysius SudibyoSMK Negeri 1 Magelang