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
  ER20 SPR 11-12 AA  ER20  11.00  12.00
  ER20 SPR 12-13 AA  ER20  12.00  13.00
  ER25 SPR 11-12 AA  ER25  11.00  12.00
  ER25 SPR 12-13 AA  ER25  12.00  13.00
  ER32 SPR 11-12 AA  ER32  11.00  12.00
  ER32 SPR 12-13 AA  ER32  12.00  13.00
  ER40 SPR 11-12 AA  ER40  11.00  12.00
  ER40 SPR 12-13 AA  ER40  12.00  13.00

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