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
  ER20 SPR 11-12  ER20  11.00  12.00
  ER20 SPR 12-13  ER20  12.00  13.00
  ER25 SPR 11-12  ER25  11.00  12.00
  ER25 SPR 12-13  ER25  12.00  13.00
  ER32 SPR 11-12  ER32  11.00  12.00
  ER32 SPR 12-13  ER32  12.00  13.00
  ER40 SPR 11-12  ER40  11.00  12.00
  ER40 SPR 12-13  ER40  12.00  13.00
  ER50 SPR 10-12  ER50  10.00  12.00
  ER50 SPR 12-14  ER50  12.00  14.00

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