• Introduction
SURFACE ACCURACY TO DIN 876
 
Design Features 
 
The bottom side of the measuring surface has to be provided with at least three support points. The design of the plate will be such as to allow the forces acting on the table to be directed towards the support points in order to minimize distortion.

Tolerance Tables

DIN 876/III
Planed / milled
DIN 876/II
Fine planed / milled, alternatively scraped
DIN 876/I 
Fine milled, alternatively fine scraped
DIN 876/0
Fine scraped with bluing
 
 
Metric (L in mm)
SAE (L in inch)
DIN 876/III 
µm = 40 + (L / 25)
mil = 1.575 + (L / 25)
DIN 876/ II 
µm = 20 + (L / 50)
mil = 0.787 + (L / 50)
DIN 876/ I 
µm = 10 + (L / 100)
mil = 0.394 + (L / 100)
DIN 876/ 0 
µm = 4 + (L / 250) 
mil = 0.157 + (L / 250)


Flatness in µm (Metric) 

L (mm) 
200
300
500
800
1000
1200
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
DIN 876/III 
48
52
60
72
80
88
100
120
140
160
180
200
220
240
260
280
300
DIN 876/II
24
26
30
36
40
44
50
60
70
80
90
100
110
120
130
140
150
DIN 876/I
12
13
15
18
20
22
25
30
35
40
45
50
55
60
65
70
75
DIN 876/0
4.8
5.2
6
7.2
8
8.8
10
12
14
16
18
20
22
24
26
28
30