MACHINE DRAWING NAME SYED AMER UR RAHMAN B
MACHINE DRAWING • NAME : SYED AMER UR RAHMAN • B. TECH 2 – 2 • TOPIC: SCREW FASTENERS
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.
- Slides: 40