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
  ER25 SPR 13-14  ER25  13.00  14.00
  ER25 SPR 14-15  ER25  14.00  15.00
  ER32 SPR 13-14  ER32  13.00  14.00
  ER32 SPR 14-15  ER32  14.00  15.00
  ER40 SPR 13-14  ER40  13.00  14.00
  ER40 SPR 14-15  ER40  14.00  15.00
  ER50 SPR 12-14  ER50  12.00  14.00
  ER50 SPR 14-16  ER50  14.00  16.00

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