STS (Single Tube System) Counterboring tools

STS Brazed Counterboring Drill Heads

Outer Thread(TYPE STS-EX) Dia.
Dc(mm)
Rework Tolerance Surface roughness
Ra
Feature/Use  
RBTU-CB STS RBTU-CB 18.90 - 65.00 RG IT9 2μm Suitable for hole expanding and hole surface finishing.
Chip Back(CB) type with chip backward evacuation.
For both blind and through holes.
RBTU-CB45
watch specification

RBTU-CB20
watch specification
RBTU-CF STS RBTU-CF 18.90 - 65.00 RG IT9 2μm Suitable for hole expanding and hole surface finishing.
Chip Forward(CF) type with chip forward evacuation.
For through hole only.
RBTU-CF45
watch specification

RBTU-CF20
watch specification

Rework symbol chart

Symbol Service Detail
RT Retipping service Carbide tips and pads replaced, drill ground to size
RG Regrinding service Regrinding of tip edge and guide pads
NA NOT AVAILABLE Not available

Indexable Reaming Head

Outer Thread(TYPE STS-EX) Dia.
Dc(mm)
Tolerance Surface roughness
Ra
Feature/Use  
KUSTR STS RBTU-CB 25.00 - IT9 - 10 2μm High productivity & High accuracy.
Can be used with various materials.
3 corner insert for ø40 and above.
watch specification
Inner Thread(TYPE STS-IN) Dia.
Dc(mm)
Tolerance Surface roughness
Ra
Feature/Use  
KUSTR STS RBTU-CB 25.00 - IT9 - 10 2μm High productivity & High accuracy.
Can be used with various materials.
3 corner insert for ø40 and above.
watch specification