244 Machine Drawing
dharm
d:\N-Design\Des16-1.pm5
Table 16.1 Surface roughness expected from various manufacturing processes
Sl.
No.
Manufacturing
Process
1 Sand casting
2
Permanent mould
casting
3
4
5
6
7
Die casting
High pressure
casting
Forging
Flame cutting,
sawing & Chipping
Radial cut-off
sawing
Extrusion
Hot rolling
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Hand grinding
Disc grinding
Filing
Planing
Shaping
Drilling
Turning & Milling
Boring
Reaming
Broaching
Hobbing
Surface grinding
Cylindrical grinding
Honing
Lapping
Polishing
Burnishing
Super finishing
Rin ma m
0.0120.0250.0500.100.200.400.801.63.26.312.5 2550 100200
5 50
0.8 6.3
0.8 3.2
0.320.32 2
2.52.5 50
1.6 28
0.160.16 5
6.3 100
1 6.3
6.3 25
1.6 25
0.250.25 25
1.6 50
1.6 25
1.6 2020
0.320.32 25
0.4 6.3
0.4 3.2
0.4 3.2
0.4 3.2
0.0630.063 5
0.0630.063 5
0.0250.025 0.4
0.0120.012 0.160.16
0.040.04 0.160.16
0.040.04 0.8
0.0160.016 0.320.32