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Metrology Laboratory

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We carry out measurement checks at all stages of production in our metrology laboratory, which is equipped with measurement equipment such as CMM, profile projector, and surface roughness control device. We obtain the best results in the shortest time by developing relevant gauges and fixtures for product control.

Tolerance Tables

TABLE 1 - LINEAR TOLERANCES (MM)
Size Range (mm) D1 D2 A1 A2
up to 6 0.30 0.24 0.30 0.24
from 6 to 10 0.36 0.28 0.36 0.28
from 10 to 18 0.44 0.34 0.44 0.34
from 18 to 30 0.52 0.40 0.52 0.40
from 30 to 50 0.80 0.62 0.80 0.62
from 50 to 80 0.90 0.74 0.90 0.74
from 80 to 120 01.10 0.88 01.10 0.88
from 120 to 180 01.60 01.30 01.60 01.30
from 180 to 250 02.40 01.90 01.90 01.50
from 250 to 315 02.60 02.20 02.60 02.20
from 315 to 400 03.60 02.80 02.80 02.40
from 400 to 500 4.00 03.20 03.20 02.60
from 500 to 630 05.40 04.40 04.40 03.40
from 630 to 800 06.20 5.00 5.00 4.00
from 800 to 1000 07.20   5.60 4.40
from 1000 to 1250     6.60  

 

TABLE 2 - HOLE TOLERANCES (Ø or D)
DIMENSION (d) (mm) Through hole (I) Blind Hole (t)
between 2 and 4 ≈ 1 x d ≈ 0,6 x d
between 4 and 6 ≈ 2 x d ≈ 1 x d
between 6 and 10 ≈ 3 x d ≈ 1,6 x d
above 10 ≈ 4 x d ≈ 2 x d

 

TABLE 3 - GEOMETRIC TOLERANCES
Planarity ▱
Circularity ○
Cylindricity ⌭
Line Profile ⌒
Plane Profile ⌓
Parallelism //
Angularity ∠
Subject ⌖
Concentricity ⦿
Symmetry ≐

 

TABLE-4 SURFACE QUALITY 

SURFACE QUALITY STANDARD

 Material Group D (Steel) Material Group A (Aluminum)
Cla (µinch)   /   Ra (µm) Cla (µinch)   /   Ra (µm)
N 8 125   /   3,2 125   /   3,2
N 9 250   /   6,3 250   /   6,3

 

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