Cylinder / Barrel

 To be checked: Cylinder diameter (by measuring)
Extraordinary wear (by sight)
 Maintenance Interval: Every 2500 operating hours
 Upper Tolerance: + 0,2 mm ( -> postnitriding/new coating)
+ 0,4 mm ( -> poss. second postnitriding )
 Instruction: Measuring:
Check the internal cylinder diameter at the above determined measuring points.
Register the progression of wear.
Register zones of extraordinary wear.
 Note: Wear is superproportional when upper tolerance is surpassed.
To avoid superproportional wear replace screw and cylinder at the same time.
Measuring
Point
Length
in mm
Diameter after operating hours
2500 5000 7500 10000 12500
1            
2            
3            
4            
5            
6