Transcript
Page 1: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

Chapter 11: Miscellaneous Types of fasteners

•Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub.•Keyseat is the groove in the shaft•Keyway is the groove in the hub or surrounding part

Page 2: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

MISCELLANEOUS FASTENERS

TYPES OF KEYS

Page 3: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

MISCELLANEOUS FASTENERS

TYPES OF KEYS

Page 4: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

Dimensioning of Keyseats

• Width• Depth• Location• Length (if required)

Page 5: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

MISCELLANEOUS FASTENERS

DIMENSIONING KEYSEATS

Page 6: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

Splines & Serrations

• A splined shaft is a shaft having multiple grooves cut around its circumference for a portion of its length in order that a sliding engagement may be made with corresponding internal grooves of a mating part

Page 7: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

SPLINES

MISCELLANEOUS FASTENERS

Page 8: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

Pin fasteners: an inexpensive and effective method of assembly when loading is primarily in shear

• Semipermanent pin fasteners– Machine pins– Radial locking pins

–Quick-release pins• Push-pull pins• Positive locking pins: cotter pins, single acting pins,

double acting pins

Page 9: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

Retaining rings or snap rings are used to provide a removable shoulder to accurately locate, retain or lock components on shafts and in bores of housings

• Stamped• Wire-formed• Spiral-wound

Page 10: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

SpringsDimension: size, shape, material, diameter,

pitch, shape of ends, length• Controlled action• Variable action• Static• Types of springs– Compression– Extension– Torsion– Power

Page 11: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

MISCELLANEOUS FASTENERS

SPRING NOMENCLATURE

Page 12: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

TYPES OF SPRINGS

MISCELLANEOUS FASTENERS

Page 13: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

RivetsBasically a rivet is a ductile metal pin that is inserted through holes in two or more parts and having the ends formed over to securely hold

the parts

• Large: structural work of buildings and bridges• Aerospace equipment• Small• Blind: blind riveting is a technique for setting a rivet without

access to the reverse side of the joint

Page 14: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

LARGE RIVETS

MISCELLANEOUS FASTENERS

Page 15: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

RIVETEDJOINTS

MISCELLANEOUS FASTENERS

Page 16: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

MISCELLANEOUS FASTENERS

RIVETEDJOINTS

Page 17: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

CONVENTIONAL RIVET SYMBOLS

MISCELLANEOUS FASTENERS

Page 18: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

11.6 Welded Fasteners and 11.7 Adhesive Fasteners

• A resistance-welded fastener is an externally or internally threaded metal part designee to be fused permanently in place by standard welding equipment

• Stress on bonded joints– Tensile– Shear– Cleavage– peel

Page 19: Chapter 11: Miscellaneous Types of fasteners Key is a piece of steel lying partly in a groove in the shaft and extending into another groove in the hub

Stresses in bonded joints


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