ER-SPR :  DIN 6499 ER spring collets with HARD TOUCH coating which increases wear resistance, improves corrosion protection, prolongs the surface finish quality and maintains longer run-out accuracy.  
 
 
CONCENTRICITY .0004 HARDNESS 46-48 SURFACE FINISH N5
  Designation
SS		 d2
min		 d2
max
  ER40 SPR 24-25  ER40  24.00  25.00
  ER40 SPR 25-26  ER40  25.00  26.00
  ER50 SPR 24-26  ER50  24.00  26.00

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