Material HT250, working surface made by skiving or precise rubbing. Used to test the straightness and flatness of workpiece and equipment installing. Working environment temperature (20 ± 5)
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Type(mm)
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Straightness and flatness of working surface
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Precision grade ( μm)
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0
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1
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2
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500*50
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3
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6
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12
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750*50
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4
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8
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15
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1000*50
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10
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20
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1600*70
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15
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30
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2000*80
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18
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36
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2500*90
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22
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44
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3000*100
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52
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3500*100
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60
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4000*100
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68
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5000*110
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84
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6300*120
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105
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