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The WOTAN® S2I is our small­est and most cost-effec­tive of our inter­nal cylin­dri­cal grind­ing machines and is ideal for small and pre­cise work­pieces. With options such as auto­matic work­piece feed­ing, it fits into your pro­duc­tion processes and thanks to the optional exter­nal grind­ing spin­dle, you catch up with our uni­ver­sal cylin­dri­cal grind­ing machines. With a changer sys­tem, you have addi­tional options for closed-door machining.

Of course, we opti­mize every S2I with you for your cur­rent and future grind­ing tasks and sup­port you with our flex­i­ble financ­ing options if required.

Key Facts

  • Parts up to 100 kg
  • Dimen­sions outer Ø300 mm and 300 mm length
  • grind­ing wheel up to Ø 300 as exter­nal grind­ing wheel
  • dif­fer­ent speed vari­ants for inter­nal grind­ing up to 120.000 rpm
  • wear-free hydro­sta­tic guid­ing systems
  • wear-free lin­ear drives
  • machine beds made of poly­mer concrete
  • WOP-TouchTM user interface

#rollers #tubes #shafts #spin­dles #tools #poly­gons #bear­ing blocks #spin­dle housings

For larger and longer com­po­nents the WOTAN® S3I is suit­able. For even more machin­ing pos­si­bil­i­ties we offer the uni­ver­sal cylin­dri­cal grind­ing machine WOTAN® S3U.


Com­pact and cost-effec­tive CNC inter­nal cylin­dri­cal grind­ing machine for light and small components

max. Umlaufdurchmesser

300 mm


175 mm


300 mm


100 kg


300 mm


300 mm

Axis speed

0–20,000 mm/​min

Round Tool Table

Direct / exter­nal drive with a res­o­lu­tion of 0.000 05°

with up to 4 tool positions

Tool Man­drel Drive

Rolling bear­ing, belt drive with­out mea­sur­ing system
Rolling bear­ing, direct drive with mea­sur­ing sys­tem as C‑axis
Hydro­sta­tic bear­ing, direct drive with mea­sur­ing sys­tem as C‑axis


  • Pre-process mea­sure­ment (to recog­nise part’s posi­tion and set zero point)
  • In-process mea­sure­ment (Ø mea­sur­ing and reg­u­lat­ing dur­ing the grind­ing process)
  • Post-process mea­sure­ment (deter­mine Ø, check clear­ances, set new zero point, NiO ejec­tion, etc.)
  • wear-free hydro­sta­tic guides for the lin­ear axes
  • wear-free hydro­sta­tic work­piece spindle
  • wear-free lin­ear drives
  • direct and exter­nally dri­ven grind­ing spindles
  • sta­tion­ary and rotary dressers
  • with and with­out round table
  • exter­nal grind­ing with exter­nal grind­ing spin­dles possible
  • Coolant prepa­ra­tion
  • Suc­tion systems
  • Motor cool­ing
  • remote main­te­nance
  • and much more
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