All Rights Reserved.Symbol: Relative to Datum: No MMC or LMC applicable: Yes – New in 2009 Drawing Callout: Description: © DANDONG FUDING ENGINEERING MACHINERY CO., LTD. radius deviation.ĭatum – reference, standard, or reference face, standard Profile of Line – it means the line deviate the theoreticalĪngle – it means the allowable angle tolerance.ĭiameter – it means the max. Profile of Surface – it means the real surface deviate the Position to deviate their theoretical positions.Ĭoncentric – it means how the axles of two circles deviate True Position – it means how far for one axle line or center Parallel – it means two lines or two surfaces should be Perpendicular – this indicates two lines or two surfaces need Hard to explain by English, but it will mean this part needs to The tolerance when round part rotates by one standard axle. Total Runout – this is the higher tolerance for indicating HighĬircle runout means the part needs to rotate perfectly by the Similar with the round, but just for the how cylinder, not just forĬircle Runout – this is one simple tolerance for indicating If round tolerance is high, then it will mean the ellipse andĬylinder – it is for the tolerance to the cylinder, which is Round – ovality, indicating how round for one round surface. Tolerance is for the rough surface of metal castings. Higher flat will mean the surface must be very flat. Straight – straightness, indicating the tolerance forįlat – flatness, indicating the flatness to one surface. We just briefly introduce their meanings, and hope theyĬould be useful for buyers and suppliers to better understand the Geometric tolerance shown on the drawings of iron and steelĬastings. The followings are the normal symbols for ┆ About Us ┆ Casting Products ┆ Casting Workshop ┆ Machining Workshop ┆ Inspection ┆ Certificate ┆ Blog Articles ┆ Contact Us ┆ Symbols for Geometric Tolerance - Dandong Foundry
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