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The NILES-SIMMONS Cranks­haft Turn-Broa­ching Machi­nes N20 TB and N30 TB are based on the modu­lar buil­ding-block sys­tem of the N‑series. Two sym­metri­cally arran­ged tool spind­les with power­ful and elec­tro­ni­cally syn­chro­ni­zed spindle dri­ves and two mir­ror imaged broa­ching units with highly dyna­mic rotary axes to locate the tool discs ensure effi­ci­ent tur­ning and turn-broa­ching ope­ra­ti­ons on cranks­haft bea­rings and other con­centric fea­tures of cranks­hafts. The use of maxi­mum 2x48 tool pockets to locate the rever­si­ble cut­ting inserts ensu­res high fle­xi­bi­lity and long tool life due to the use of sis­ter tools.

Your benefits at a glance:

  • 2 sym­metri­cal, tem­pe­ra­ture con­trol­led motor spindle dri­ves with excel­lent power and tor­que para­me­ters
  • Rapid posi­tio­ning of cut­ting tools by means of highly dyna­mic rotary axes
  • Simul­ta­ne­ous ope­ra­tion of both tool disks with inde­pen­dent feed rates
  • Adap­ta­ble clam­ping solu­ti­ons with shaft chucks to machine flange and post in one setup
  • Semi-auto­ma­tic tool clam­ping, auto­ma­tic trans­fer of pre-set tool data via ID-chip
  • Adap­ta­ble clam­ping solu­ti­ons with shaft chucks to machine flange and post in one setup
  • Semi-auto­ma­tic tool clam­ping, auto­ma­tic trans­fer of pre-set tool data via ID-chip

Technical data

Turn Broa­ching TB
Spe­ci­fi­ca­tion N20 TB N30 TB
Working area
Nomi­nal length mm 1000 / 1500 1500 / 2000 / 2500
Swing over cross slide guide mm 650 780
Tool length, max. mm 500 / 850 800 / 1300 / 1800
Main spindle and coun­ter
Work spindle nose acc.to DIN 550266 size A8 A11
Work spindle bore mm 92 92
Spindle dia­me­ter in front bea­ring mm 150 180
Drive power 100% / 60% duty cycle kW 2 x 31 / 35 2 x 64 / 78
Speed range rpm 2500 3000
LH and RH tool drive unit
Rapid feed cross / lon­gi­tu­di­nal m/min 30 / 40 18 / 30
LH and RH tool sys­tem
Tool accep­tance DIN 55026 A11 A11
Tool dia­me­ter mm 700 700 (800)
Pockets num­ber 45 / 48 45 / 48

Technical data

Turn Broa­ching TB
Spe­ci­fi­ca­tion N20 TB N30 TB
Working area
Nomi­nal length mm 1000 / 1500 1500 / 2000 / 2500
Swing over cross slide guide mm 650 780
Tool length, max. mm 500 / 850 800 / 1300 / 1800
Main spindle and coun­ter
Work spindle nose acc.to DIN 550266 size A8 A11
Work spindle bore mm 92 92
Spindle dia­me­ter in front bea­ring mm 150 180
Drive power 100% / 60% duty cycle kW 2 x 31 / 35 2 x 64 / 78
Speed range rpm 2500 3000
LH and RH tool drive unit
Rapid feed cross / lon­gi­tu­di­nal m/min 30 / 40 18 / 30
LH and RH tool sys­tem
Tool accep­tance DIN 55026 A11 A11
Tool dia­me­ter mm 700 700 (800)
Pockets num­ber 45 / 48 45 / 48
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