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MACHINE PARTSMACHINE PARTS (FOR DCE / DIT)

Books for reference

Notation: (i) N engineering drawing ( By N.D.Bhatt) Latest edition (ii) M Machine drawing ( By N.D.Bhatt)

6. Nuts (N)

NOMENCLATURE OF THREADSout side diameterAngleLeadPitchRoot / Core diaFlankCrestRootNominal diameterINTERNAL THREADEXTERNAL THREADSQUARE THREADT= d = 0.5PTP90dTYPES OF THREADSD55Pdd/6D=0.96Pd=0.64PWHITWORTH THREADTYPES OF THREADSBUTTRESS THREADDdPFd/8d/8D = Pd = 0.75P45TYPES OF THREADSDPRR=0.25PD=0.5PKNUCKLE THREADTYPES OF THREADS24HEXAGONAL HEADED BOLT WITH HEXAGONAL NUT AND WASHER52402010024348wRIVETED JOINTSPlates joined together by means of a riveted joint cannot be disconnected without Chipping off rivet heads from one side of the jointButt joint:- In a butt joint edges of the plates to be connected butt against each other and the joint between them is covered by butt plates Rivets are used to fasten permanently two or more plates or pieces of metal .Joints made with rivets are called riveted joints.They are commonly used in ship building and for the Construction of steel buildings ,bridges ,boilers ,tanks, etc.Types of riveted jointsLap joint:- In a lap joint the plates to be connected over lap each otherDouble riveted lap jointPAA1.5ddttPr1.5dLDouble riveted (zig zag) lap jointAAPdP1.5dPr1.5dtPA1.5dAL1.5dSingle riveted butt jointSimple forms of these bolts can quickly forged from mild steel or wrought iron bar .These bolts are suspended in hole and cement grout is then poured to fill up the space around themFOUNDATION BOLTSThese bolts are used for fixing machines to their foundations.DEYE FOUNDATION BOLTRAG FOUNDATION BOLT4872120LEWIS FOUNDATION BOLT24241636105LIFTING EYE-BOLT1.5D1.5D2D0.4D0.8D2DEYE BOLTDD2D2DFlanged nutTYPES OF NUTSD0.25D2.2DDCap nutD0.5D0.25D1.5D+3DDome nutDD0.5DCapstan nut1.8DDD0.2DWing nut0.5D1.8D1.5DDRing nutT-headed bolt0.8D0.8D0.8DD1.8DHook bolt0.8DDCounter sunk headed bolt0.8DDCup headed boltD0.8DPREVENTION OF ROTATION OF BOLTSCup headed boltSquare headed boltCheese headed boltSPLIT-PINLOCKING ARRANGEMENT FOR NUTSLOCK NUT OR CHECK NUTD0.6DDNUT BOLT WITH SPRING WASHERCASTLE NUT WITH A SPLIT PINSLOTTED NUT WITH A SPLIT PINCOTTER JOINTKNUCKLE JOINTFLANGE COUPLINGPROTECTIVE FLANGE COUPLINGBUSHED BEARINGFOOT STEP BEARINGPLUMMER BLOCKPREVENTING ROTATION OF BRASSESBy making a step rectangular on the one outside and fitting inside a corresponding hole SNUGSBy snugs at the sidePREVENTING ROTATION OF BRASSESSNUGSBy snugs at the top fitting inside the cap. the oil hole is drilled inside a corresponding hole.PREVENTING ROTATION OF BRASSESby making the step octagonal on the outside and fitting inside a corresponding hole.PREVENTING ROTATION OF BRASSES