ER-SPR-AA :  DIN 6499 'AA' ultra precise 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 .0002 HARDNESS 46-48 SURFACE FINISH N5
  Designation
SS		 d2
min		 d2
max
  ER11 SPR 2-3 AA  ER11  2.00  3.00
  ER11 SPR 3-4 AA  ER11  3.00  4.00
  ER16 SPR 2-3 AA  ER16  2.00  3.00
  ER16 SPR 3-4 AA  ER16  3.00  4.00
  ER20 SPR 2-3 AA  ER20  2.00  3.00
  ER20 SPR 3-4 AA  ER20  3.00  4.00
  ER25 SPR 2-3 AA  ER25  2.00  3.00
  ER25 SPR 3-4 AA  ER25  3.00  4.00
  ER32 SPR 2-3 AA  ER32  2.00  3.00
  ER32 SPR 3-4 AA  ER32  3.00  4.00
  ER40 SPR 3-4 AA  ER40  3.00  4.00

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