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NXT Tool Grinder

The Star NXT CNC 5-axis tool and cutter grinding system provides a large grind zone that enables manufacturers to run both small and large diameter tools, yet is packaged in a cost-effective compact footprint. The NXT leverages the heritage of Star Cutter’s previous grinding machines’ capability reimagined in a modular design that offers easily configurable options and a competitive price point.

Suited for a variety of applications, including:

  • Drills and Reamers
  • Milling Cutters
  • Form Cutters
  • Medical Tools
  • Taps
  • Punches and drives
  • Gear Tools
  • Specialty Tools
  • Boring Bars
  • Profiling Blades/inserts

The Star NXT CNC 5-axis tool and cutter grinding system provides a large grind zone that enables manufacturers to run both small and large diameter tools, yet is packaged in a cost-effective compact footprint. The NXT leverages the heritage of Star Cutter’s previous grinding machines’ capability reimagined in a modular design that offers easily configurable options and a competitive price point.

Gear Cutting Tool Sharpening

Profile Grinding & Part Flipping

Medical Device Grinding & ESPRIT CAM

Standard Features Include:

Modular Design

Standard platform decreases lead times while enabling quick adaptation to specific customer application requirements

Flexible Wheel Change

Up to 5-station configuration for quick changeover

Two Spindle Offerings

Handle tool regrinding to large production

Servo-Controlled

Programmable positioning of tool supports

Tooling Rail and Support Options

Standard and extended length tooling rails to accommodate various tool lengths

Linear Motors

Eliminates backlash, friction effects and drive vibration as compared to ball screws

Space Saving

Holds two full pallets and two unload pallets

GDS µGrind Chuck

Automatic blank clamping system eliminates radial and axial runout without special tools

Auto-lube Grease System

High-resolution Linear Glass Scales

24-hour Service Response Time

Manufactured in the USA

Flexible Options:

  • Grinding SpindlesAsynchronous, Auto HSK50, 7.5KW
    Synchronous, Auto HSK50, 15KW
    Synchronous, Auto HSK50, 28KW
  • Extended tool rail: 24" length (standard 17.3")
  • On machine truing and dressing motor
  • CNC W-Axis for travel of tool support options along the Z-Axis
  • Manual and automatic tailstock designs
  • Hydraulic actuated steady rest support
  • Extended capabilities to hold and regrind gundrills up to 48"
  • Robot Automation Fully-integrated Fanuc LR Mate 200iD 6-axis robot to serve round and flat blank applications
    Automatically load, unload, and flip parts for grinding on both ends
    Adapt to multiple part profiles within a single run
    Automated tool laser marking option

Automation Specifications

Part Diameter Range Grippers accommodate 0.188" - 1.25" (5 - 32mm)
Part Length Auto load parts up to 14" (256mm)
Part Weight Auto load single parts up to 6.5lb (3kg) or dual parts up to 3.3lb (1.5kg)
Part Pallets 4; 2 for blanks, 2 for finished parts
Pallet Density
0.188" - 0.275" (3.7 - 7.0mm) - 221 parts/pallet
0.275" - 0.512" (>7 - 13mm) - 130 parts/pallet
0.512" - 0.787" (>13 - 20mm) - 63 parts/pallet
0.787" - 1.26" (>20 - 32mm) - 30 parts/pallet

Machine Specifications

  • 2300mm x 2032mm x 2284mmBase Machine Dimensions (L x W x H)
  • 5,964kgTotal Weight: Base Machine
  • 254mmMaximum Workpiece Diameter*
  • 381mmMaximum Grind Length, End Work
  • 406mmMaximum Grind Length, Fluting
  • 1000rpmC - Axis Headstock Spindle 360° Rotation
  • 12rpmB - Axis Grinding Spindle Swivel +/- 120°
  • 506mmX - Axis Horizontal Travel
  • 50m/minX - Axis Travel Speed
  • 650mmY - Axis Vertical Travel
  • 50m/minY - Axis Travel Speed
  • 768mmZ - Axis Horizontal Travel
  • 50m/minZ - Axis Travel Speed
  • 20,000rpmGrinding Spindle Max. Speed
  • 28kwPeak Spindle Power
  • 203.2mmGrinding Wheel Diameter (Wheel Changing) **
  • 0.0001mmSmallest Programmable Movement - Linear
  • 0.00001mmLinear Axis Glass Scale Feedback Resolution
  • 0.0001°Smallest Programmable Movement - Rotary
  • 0.000068°Rotary Axis Feedback Resolution: A-axis
  • 0.00000006°Rotary Axis Feedback Resolution: B-axis

NUMROTO Software

NXT grinders feature the latest Flexium+ CNC solution with NUMROTO 4.2.0, a comprehensive software package for producing and resharpening a wide range of tools. Even the most complex shapes can be easily programmed and executed.

A complete NUMROTO solution includes many functions to manufacture or regrind a tool as efficiently as possible. With functions such as 3D simulation, extensive and precise probe cycles for tool and wheel, in-process wheel dressing, job control, creation of elevation drawings, adaptive grinding and more, the system can be expanded per user needs.

NUMROTO can be integrated into the company network.

Based on current Windows systems, NUMROTO can be integrated into the company network. Central storage and administration of part programs and extended back-up functions are therefore easy to implement.

  • Full library of available softwareto tackle the most demanding cutting tool designs
  • Free software version updatesfor the life of your NXT
  • USA based application support teamfor training and troubleshooting

ESPRIT Software

To serve the medical grinding community, Star Cutter and Hexagon Manufacturing Intelligence have an exclusive partnership where ESPRIT CAM software is pre-packaged to run the Star Cutter 5-axis software right out of the box. ESPRIT is a high-performance CAM system for CNC programming, optimization and simulation. Well known for its machine-optimized, edit-free G-code (toolpath), ESPRIT leverages a digital twin simulation platform to model the finished part, tools, and CNC machine. AI-based algorithms eliminate manual data input and provide machine operators with greater assurance of what will happen on the shop floor. The result – simplified programming, increased tool life and utilization, reduced cycle times and improved productivity.

This packaged solution is perfect for manufacturers of complex medical tooling, such as hip rasps, rotary files, bone files and drills, etc. ensuring that your machine will launch quickly and keep running at top efficiency.

Star Cutter Company has developed into a world leader in the cutting tool industry. Each of our six manufacturing facilities specializes in producing a specific type of product or service: solid carbide cutting tools, carbide blanks and preforms, gundrills, gear cutting tools, and 5-axis CNC tool and cutter grinding machines.


23461 Industrial Park Drive
Farmington Hills, MI 48335

Tel. 248-474-8200
Fax. 248-474-9518