RG9A - Coborn Engineering

RG9A - PCD Tool Production

The RG9A enables high precision CNC grinding of both hard and ultra-hard materials

Multi functional capabilities

Launched in 2016, the RG9A is a fully automatic, high precision grinding machine designed to meet the sophisticated demands of toolmakers working with both hard and ultrahard materials, such as carbides, ceramics, PCD and PcBN.

Drawing on our 75 years of experience in designing machines for grinding and polishing diamond and related materials, the RG9A's construction ensures fast grinding times and repeatable accuracy to 2μm tolerances. The Coborn designed and manufactured wheel spindle is dynamically balanced to ensure minimal edge chipping of brittle and delicate tool materials. Programming is rapid, menu driven and straightforward for the operator and the ultra-fast vision system, with closed loop feedback, ensures minimum cycle times and maximum rates of throughput.

The RG9A is ideal for tool manufacturers making both small and large batch sizes. Individual tool set up times are quick and, if required, robot loading is available. From simple, single point shank tools to helical/radius multi-point rotary tools, the RG9A has all the characteristics, functions and capabilities needed to minimize tool production costs.


RG9A Machine in the factory
• 21.5 inch touch screen monitor
• Coborn .net software
• Remote diagnostic / support
• Integrated closed loop measuring / inspection
• High resolution GigE camera
• System mounted on X / Y stage 0.0001m resolution
• Optimum vibration damping
• Excellent thermal stability
• High stiffness
• Optional RM130 or RM250 units
• Continuous or indexing 0.001° programme resolution
• Hydraulic, HSK and ISO adaptors
• Optional LM50 or LM100 units
• Hellical / stepped tool production
• 0.001mm program resolution
• In process wheel dressing
• Electrically driven with programmable speed
• Variable contact pressure
• Coborn high precision spindle
• High dynamic stiffness
• 0.001° program resolution
• CNC Control System
• Industrial PC, Intel 17 processor, Windows platform
• 3 Phase, multi voltage / frequency supply

Area Specification
Machine dimensions (w x d x h) – 1570mm x 1540mm x 2540mm
Machine weight – 1750kg
CNC control system – CNC control with Intel i7 processor running Coborn .net software on a Windows platform
Grinding wheel spindle – 2.2kW 500 – 4000 rpm programmable
Grinding wheel – Ø 150mm – 220mm 6A2 different styles available on request
Dressing system – Coborn in-process dressing system
Lubrication – Centralised automatic lubrication system
Process measurement – Coborn integrated camera measuring system +/- 0.002mm resolution
Electrical requirements – 380/220 3phase 50/60 Hz 20Amps
Mechanical options – Robot loading system (RU1), Rotary axis (RM), Linear module (LM), Work piece clamping systems (TH), Tailstock units (TSU)

Software options – Peripheral / CAM grinding software, Heli/Rad convex, High precision
location block, High resolution camera (10M Pixels), Dxf. import (profile grind)

  • LM50 & LM100
    Linear Axis - Full CNC control - Used for tool positioning or, with the RM rotary axis, for helical tool grinding - 50mm or 100mm linear motion, respectively - 0.1μm feedback resolution
  • RM130: Rotary Axis
    Full CNC control - Indexing to 0.001° resolution or continuous rotation - Face plate design for hydraulic chucking systems, HSK and ISO adapters - Custom adapters available to special order
  • RM250: Rotary Axis
    As RM130 - Designed for grinding larger workpieces such a CVD rotary dressers and saw blades up to 150mm in diameter
  • Laser Measuring System
    To accurately reposition the RM Rotary Axis in order to eliminate loading and brazing errors. Triangulation system corrects the machine's grinding blocks for both tip height and rake angle.
  • Screwdriver Station
    Performs a rapid tool change while the RG9AR is performing the grinding operation to optimise efficiency.
  • Optional Software Modules
    Peripheral Grinding Module, High Precision (<0.2μm) Location and Measurement Module, CAD File Import (dxf) Module, Dual Wheel Module and K-Land + Module.

RG Series Brochure

Brochure and data sheets for the RG Series

  • RG9A Floorplan

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