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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
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MISCELLANEOUS FASTENERS
TYPES OF KEYS
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MISCELLANEOUS FASTENERS
TYPES OF KEYS
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Dimensioning of Keyseats
Width Depth Location Length (if required)
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MISCELLANEOUS FASTENERS
DIMENSIONING KEYSEATS
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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
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MISCELLANEOUS FASTENERS
SPLINES
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Semipermanent pin fasteners
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
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Stamped Wire-formed Spiral-wound
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
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Springs Dimension: size, shape, material, diameter, pitch, shape of ends, length
Controlled action Variable action Static Types of springs Compression Extension Torsion Power
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MISCELLANEOUS FASTENERS
SPRING NOMENCLATURE
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MISCELLANEOUS FASTENERS
TYPES OF SPRINGS
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Rivets Basically 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
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MISCELLANEOUS FASTENERS
LARGE RIVETS
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MISCELLANEOUS FASTENERS
RIVETED JOINTS
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MISCELLANEOUS FASTENERS
RIVETED JOINTS
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MISCELLANEOUS FASTENERS
CONVENTIONAL RIVET SYMBOLS
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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
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Stresses in bonded joints
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