Black granite control square ALPA
Characteristics- Suitable for perpendicularity checks
- Manufactured to very tight tolerances and with stable support
- Relief holes are drilled in the large squares
- Surfaces are lapped
- Grade “00” finish with accuracies as per table
- Available in absolute black diabase on request
Variations
Code
Dimensions mm
Flatness mm
Accuracy mm
Perpendicularity mm
HA140300
Dimensions mm
300 x 200 x 60
Flatness mm
2,5
Accuracy mm
± 0,0016
Perpendicularity mm
2,5
6
HA140400
Dimensions mm
400 x 250 x 80
Flatness mm
3/2,5
Accuracy mm
± 0,0018
Perpendicularity mm
3
10
HA140500
Dimensions mm
500 x 300 x 60
Flatness mm
3/2,5
Accuracy mm
± 0,002
Perpendicularity mm
3,5
20
HA140630
Dimensions mm
630 x 400 x 80
Flatness mm
3
Accuracy mm
± 0,0023
Perpendicularity mm
4
3,5
HA1401000
Dimensions mm
1000 x 630 x 100
Flatness mm
4/3
Accuracy mm
± 0,0026
Perpendicularity mm
6
120
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