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
  ER11 SPR 5-6  ER11  5.00  6.00
  ER11 SPR 6-7  ER11  6.00  7.00
  ER16 SPR 5-6  ER16  5.00  6.00
  ER16 SPR 6-7  ER16  6.00  7.00
  ER20 SPR 5-6  ER20  5.00  6.00
  ER20 SPR 6-7  ER20  6.00  7.00
  ER25 SPR 5-6  ER25  5.00  6.00
  ER25 SPR 6-7  ER25  6.00  7.00
  ER32 SPR 5-6  ER32  5.00  6.00
  ER32 SPR 6-7  ER32  6.00  7.00
  ER40 SPR 5-6  ER40  5.00  6.00
  ER40 SPR 6-7  ER40  6.00  7.00

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