Holemaking with helical feed

DesignationTool ø DCXMin. ma diametchining er(mm)Max. m diametachining er(mm)Pitch P
øD(mm)øDøD1øDøD1(mm)
øD1ERC12R032…ø3252206230< 6
ERC12R033…ø3354216431< 6
PT/ERC12R040…ø4068287838< 6
T/ERC12R050…ø5088389848< 6
TRC12R063…ø631145112461< 6
TRC12R080…ø801486815878< 6
ERC16R040…ø4064247838< 8
T/ERC16R050…ø5084349848< 8
TRC16R063…ø631104712461< 8
TRC16R080…ø801446415878< 8
TRC16R100…ø1001848419898< 8
TRC16R125…ø125234109248123< 8

When holemaking with a helical feed, the pitch (P) needs to be set at lower values than that shown above.

Tool ø DCXMax. rampingL ra: tool mpingpass leng angle isth whe 2 degren es
Designation(mm)angleap (mm)
RMPX23468
ERC12R032…ø3210º5785114171
ERC12R033…ø335785114171
T/ERC12R040…ø405785114171
T/ERC12R050…ø505785114171
TRC12R063…ø635785114171
TRC12R080…ø802.3º5785114171
ERC16R040…ø4012º5785114171229
T/ERC16R050…ø507.4º5785114171229
TRC16R063…ø635785114171229
TRC16R080…ø804.3º5785114171229
TRC16R100…ø1005785114171229
TRC16R125…ø1252.4º5785114171229

Tool pass length: L = ap / tan RMPX, Ramping angle needs to be set at smaller than 2 degrees in order to prevent chips from getting tangled.