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Precisiewerk Zierikzee BV

SURFACE QUALITY

The surface is free of deep grooves and will be within the range of N7 to N9 (according to DIN ISO 1302).

 

Surface quality


CLA
[uinch]
Ra
[um]
Rz
[um]
Rt
[um]
Machining N1
N2
N3
N4
N5
N6
1
2
4
8
16
32
0.025
0.050
0.1
0.2
0.4
0.8
0.22-0.30
0.45-0.60
0.8-1.1
1.0-1.8
1.6-2.8
3.0-4.8
0.24-0.40
0.49-0.90
0.85-1.45
1.10-2.40
1.75-3.60
3.2-60
Investment Casting N7
N8
N9
63
125
250
1.6
3.2
6.30
5.9-8.0
12-16
23-32
6.3-10.0
13.0-19.5
25-38
Sand Casting N10
N11
N12
500
1000
2000
12.5
25
50
46-57
90-110
180-220
46-48
95-130
190-250
NOTE: CLA, Ra, Rz en Rt are indicative values


Shown below is an overview of different operations and processes and the surface quality that can be reached.


There is a choice of various surface finishes/qualities within our production process:

Sandblasting with aluminium oxide

Steelblasting with Steel Shot

Beadblasting with Glassbeads

(Manual) Polishing

Standard for non-ferrous alloys, the surface is dull and relatively rough, depending on the material.

Standard for ferrous alloys, gives a smooth and blank surface. Used if asked by the customer, the surface is smooth and relatively dull, depending on the material. Used for a very smooth and shiny surface. Disadvantage: sharp edges are flattend.