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Add rounded corners in metal plate Angle place, make it not sharp, increase their sexual contact.
In order to remove the parts because of the machining burrs, also in order to facilitate part assembly, generally at the end of the parts made of Chamfering is 45 ° more, also can be made into 30 ° and 60 °.

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Bevel surface defect tolerance:

SURFACE DEFECT FOR CUTTING SURFACE
Grade	Defect width	Defect depth	Depth space
1	≤3	≤1	≥3
2	≤5	≤1.5	≥2

Bevel thick tolerance:

The angle and depth tolerance range for cutting surface of bevels
Grade	Bevel angle	Thickness of root face	thickness of root face ＞ 4mm
Grade	Bevel angle	Bevel thickness tolerance
1	±2.5	±0.5	±1.0
2	±5	±1.0	±2.0

Explain for lendth dimension tolerance:

The tolerance of the length dimension for cutting surface
Grade	DIN	Cutting thickness
		6--10	＞10-50	＞50-100	＞100-150	＞150-200	＞200-250	＞250-300
		Tolerance range
A	≤315	±0.5	±0.7	±1.0	±2.0	±2.5
	＞315-1000	±0.7	±1.0	±2.0	±2.5	±3.0	±3.5	±4.0
	＞1000-2000	±1.0	±1.5	±2.5	±3.0	±3.5	±4.0	±5.0
	＞2000-4000	±1.5	±2.0	±3.0	±4.0	±4.5	±5.0	±6.0
	＞4000-6000	±2.0	±2.5	±3.5	±4.5	±5.0	±6.0	±7.0
	＞6000	±2.5	±3.0	±4.0	±5.0	±6.0	±7.0	±8.0

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