MACHINE PARTS Flank Root Core dia Pitch Crest

MACHINE PARTS

Flank Root / Core dia Pitch Crest Root NOMENCLATURE OF THREADS out side diameter Lead Nominal diameter Angle

EXTERNAL THREAD INTERNAL THREAD

TYPES OF THREADS T P d 90 T= d = 0. 5 P SQUARE THREAD

TYPES OF THREADS 55° d D d/6 P D=0. 96 P d=0. 64 P WHITWORTH THREAD

TYPES OF THREADS T d 29° p T=0. 3707 p d= 0. 5 p + 0. 25 mm ACME THREAD

d/8 TYPES OF THREADS P d/8 d 45° D = P d = 0. 75 P BUTTRESS THREAD D F

TYPES OF THREADS P D R R=0. 25 P D=0. 5 P KNUCKLE THREAD

48 24 52 40 20 3 100 24 w HEXAGONAL HEADED BOLT WITH HEXAGONAL NUT AND WASHER

RIVETED JOINTS 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. Plates joined together by means of a riveted joint cannot be disconnected without Chipping –off rivet heads from one side of the joint Types of riveted joints Lap joint: - In a lap joint the plates to be connected over lap each other Butt 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

Pr 1. 5 d Pr t t t d 1. 5 d P P Pd A L Double riveted lap joint A A A Double riveted (zig zag) lap joint

1. 5 d P L A A Single riveted butt joint

FOUNDATION BOLTS These bolts are used for fixing machines to their foundations. Simple 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 them

EYE FOUNDATION BOLT D

120 RAG FOUNDATION BOLT 48 72

24 ø 24 105 16 36 LEWIS FOUNDATION BOLT

0. 8 D 5 D 2 D 2 D 1. 5 D 0. 4 D 1. LIFTING EYE-BOLT

D EYE BOLT 2 D D 2 D

TYPES OF NUTS 0. 25 D D D 2. 2 D Flanged nut

D 0. 25 D 0. 5 D 1. 5 D+3 D Cap nut

0. 5 D D D Dome nut

D 1. 8 D 0. 2 D D Capstan nut

0. 5 D 1. 8 D D 1. 5 D Ring nut Wing nut

PREVENTION OF ROTATION OF BOLTS 0. 8 D D D 1. 8 D 0. 8 D Hook bolt T-headed bolt Counter sunk headed bolt 0. 8 D D D 0. 8 D Cup headed bolt

Cup headed bolt Square headed bolt Cheese headed bolt

LOCKING ARRANGEMENT FOR NUTS SPLIT-PIN

0. 6 D D D LOCK NUT OR CHECK NUT

NUT BOLT WITH SPRING WASHER

CASTLE NUT WITH A SPLIT PIN

SLOTTED NUT WITH A SPLIT PIN

COTTER JOINT

KNUCKLE JOINT

FLANGE COUPLING

PROTECTIVE FLANGE COUPLING

FOOT STEP BEARING BUSHED BEARING

PLUMMER BLOCK

PREVENTING ROTATION OF BRASSES By making a step rectangular on the one outside and fitting inside a corresponding hole

PREVENTING ROTATION OF BRASSES SNUGS By snugs at the side

PREVENTING ROTATION OF BRASSES SNUGS By snugs at the top fitting inside the cap. the oil hole is drilled inside a corresponding hole.

PREVENTING ROTATION OF BRASSES by making the step octagonal on the outside and fitting inside a corresponding hole.