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

MISCELLANEOUS FASTENERS TYPES OF KEYS

MISCELLANEOUS FASTENERS TYPES OF KEYS

Dimensioning of Keyseats Width Depth Location Length (if required)

MISCELLANEOUS FASTENERS DIMENSIONING KEYSEATS

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

MISCELLANEOUS FASTENERS SPLINES

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

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

Springs Dimension: size, shape, material, diameter, pitch, shape of ends, length Controlled action Variable action Static Types of springs Compression Extension Torsion Power

MISCELLANEOUS FASTENERS SPRING NOMENCLATURE

MISCELLANEOUS FASTENERS TYPES OF SPRINGS

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

MISCELLANEOUS FASTENERS LARGE RIVETS

MISCELLANEOUS FASTENERS RIVETED JOINTS

MISCELLANEOUS FASTENERS RIVETED JOINTS

MISCELLANEOUS FASTENERS CONVENTIONAL RIVET SYMBOLS

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

Stresses in bonded joints