DIN 1686 - Standard for Rough Casting General Tolerance
          
			What standard can be used for the 
			rough casting 
			dimensional tolerance for iron, 
			steel and aluminum castings? and how can find a free downloaded DIN 
			1686 standard? 
			
			We recommend the DIN 1686 standard for the rough casting general tolerance. 
			Please see the following table. We believed this standard is widely 
			using by the purchasers and suppliers. It is a good reference for 
			the unspecified casting tolerance.  
			
			However, we still think we should 
			not take it as an absolutely inspection standard. For some 
			positions, if they do not need as accurate as this standard 
			requirements, we should enlarge the tolerance. Likewise, for the 
			positions, we should take them more seriously in case of unnecessary 
			trouble caused on your clients. All in all, you should take this 
			standard as a useful reference, not an accurate inspection standard. 
			DIN 1686 – 1 
			Length (mm) 
			
				
					
						| 
						 
						   | 
						
						 
						-6  | 
						
						 
						-10  | 
						
						 
						-20  | 
						
						 
						-30  | 
						
						 
						-50  | 
						
						 
						-80  | 
						
						 
						-120  | 
						
						 
						-180  | 
					 
					
						| 
						 
						GTB20  | 
						
						 
						-  | 
						
						 
						-  | 
						
						 
						-  | 
						
						 
						±7.5  | 
						
						 
						±11  | 
						
						 
						±12  | 
						
						 
						±13  | 
						
						 
						±14  | 
					 
					
						| 
						 
						GTB19  | 
						
						 
						-  | 
						
						 
						-  | 
						
						 
						±4.5  | 
						
						 
						±7.5  | 
						
						 
						±8  | 
						
						 
						±8.5  | 
						
						 
						±9  | 
						
						 
						±10  | 
					 
					
						| 
						 
						GTB18  | 
						
						 
						-  | 
						
						 
						±2.5  | 
						
						 
						±4.5  | 
						
						 
						±4.7  | 
						
						 
						±5  | 
						
						 
						±5.5  | 
						
						 
						±6.5  | 
						
						 
						-  | 
					 
					
						| 
						 
						GTB17  | 
						
						 
						±1.5  | 
						
						 
						±2.5  | 
						
						 
						±2.9  | 
						
						 
						±3  | 
						
						 
						±3.2  | 
						
						 
						±3.4  | 
						
						 
						±3.7  | 
						
						 
						-  | 
					 
					
						| 
						 
						GTB16  | 
						
						 
						±1.5  | 
						
						 
						±1.8  | 
						
						 
						±1.8  | 
						
						 
						±1.9  | 
						
						 
						±2  | 
						
						 
						±2.1  | 
						
						 
						±2.3  | 
						
						 
						-  | 
					 
					
						| 
						 
						GTB15  | 
						
						 
						±0.95  | 
						
						 
						±1  | 
						
						 
						±1.1  | 
						
						 
						±1.2  | 
						
						 
						±1.3  | 
						
						 
						±1.4  | 
						
						 
						-  | 
						
						 
						-  | 
					 
				 
			 
			Thickness (mm) 
			
				
					
						| 
						 
						   | 
						
						 
						-6  | 
						
						 
						-10  | 
						
						 
						-20  | 
						
						 
						-30  | 
						
						 
						-50  | 
						
						 
						-80  | 
						
						 
						-120  | 
						
						 
						-180  | 
					 
					
						| 
						 
						GTB20  | 
						
						 
						-  | 
						
						 
						-  | 
						
						 
						-  | 
						
						 
						±7.5  | 
						
						 
						±11  | 
						
						 
						±12  | 
						
						 
						±13  | 
						
						 
						±14  | 
					 
					
						| 
						 
						GTB19  | 
						
						 
						-  | 
						
						 
						-  | 
						
						 
						±4.5  | 
						
						 
						±7.5  | 
						
						 
						±8  | 
						
						 
						±8.5  | 
						
						 
						±9  | 
						
						 
						±10  | 
					 
					
						| 
						 
						GTB18  | 
						
						 
						-  | 
						
						 
						±2.5  | 
						
						 
						±4.5  | 
						
						 
						±4.7  | 
						
						 
						±5  | 
						
						 
						±5.5  | 
						
						 
						±6.5  | 
						
						 
						-  | 
					 
					
						| 
						 
						GTB17  | 
						
						 
						±1.5  | 
						
						 
						±2.5  | 
						
						 
						±2.9  | 
						
						 
						±3  | 
						
						 
						±3.2  | 
						
						 
						±3.4  | 
						
						 
						±3.7  | 
						
						 
						-  | 
					 
					
						| 
						 
						GTB16  | 
						
						 
						±1.5  | 
						
						 
						±1.8  | 
						
						 
						±1.8  | 
						
						 
						±1.9  | 
						
						 
						±2  | 
						
						 
						±2.1  | 
						
						 
						±2.3  | 
						
						 
						-  | 
					 
					
						| 
						 
						GTB15  | 
						
						 
						±0.95  | 
						
						 
						±1  | 
						
						 
						±1.1  | 
						
						 
						±1.2  | 
						
						 
						±1.3  | 
						
						 
						±1.4  | 
						
						 
						-  | 
						
						 
						-  | 
					 
				 
			 
			
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