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
  ER16 SPR 7-8  ER16  7.00  8.00
  ER16 SPR 8-9  ER16  8.00  9.00
  ER20 SPR 7-8  ER20  7.00  8.00
  ER20 SPR 8-9  ER20  8.00  9.00
  ER25 SPR 7-8  ER25  7.00  8.00
  ER25 SPR 8-9  ER25  8.00  9.00
  ER32 SPR 7-8  ER32  7.00  8.00
  ER32 SPR 8-9  ER32  8.00  9.00
  ER40 SPR 7-8  ER40  7.00  8.00
  ER40 SPR 8-9  ER40  8.00  9.00

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