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NXT Tool Grinder

The Star Cutter 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 at 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

Gear Cutting Tool Sharpening

Profile Grinding & Part Flipping

Medical Device Grinding & ESPRIT CAM

Machine Overview

Click the machine to explore the NXT's key features.

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Hydraulic Pop-up

Steady Rest

For precision tool support. 25mm of travel allows for the rest to drop down and out of the way for automated loading and unloading.

Click the machine to view more features

Standard Features Include:

Modular Design

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

Flexible Wheel Change

Multiple wheel change options

Three 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

Compact design to save on floor space

Auto-lube Grease System

High-resolution Linear Glass Scales

24-hour Service Response Time

Manufactured and supported in the USA

Flexible Options:

  • Grinding SpindlesAuto HSK50, 15kW, Synchronous
    Auto HSK50, 28kW, Synchronous
  • Extended capabilities to hold and regrind gundrills up to 48"
  • 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
  • Robot Automation Fully-integrated Fanuc LR Mate 200iD 6-axis robot to serve round and flat blank applications
    Automatically load, unload, and part flipping for grinding on both ends
    Adapt to multiple part profiles within a single run
    Automated tool laser marking option

Automation Specifications

Part Diameter Range Standard Gripper: Accommodates 0.188" - 1.250" (5 - 32mm)
Small Gripper: Accommodates ≤ 0.787" (≤ 20mm)
Custom Gripper: Accommodates >1.250" (> 32mm)
Part Length Auto load parts up to 12” (305 mm)
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

  • Base Machine Dimensions (L x W x H)2300mm x 2032mm x 2284mm
  • Total Weight: Base Machine5,964kg
  • Maximum Workpiece Diameter*254mm
  • Maximum Grind Length, End Work381mm
  • Maximum Grind Length, Fluting406mm
  • C - Axis Headstock Spindle 360° Rotation1000rpm
  • B - Axis Grinding Spindle Swivel +/- 120°12rpm
  • X - Axis Horizontal Travel506mm
  • X - Axis Travel Speed50m/min
  • Y - Axis Vertical Travel650mm
  • Y - Axis Travel Speed50m/min
  • Z - Axis Horizontal Travel768mm
  • Z - Axis Travel Speed50m/min
  • Grinding Spindle Max. Speed20,000rpm
  • Peak Spindle Power28kw
  • Grinding Wheel Diameter (Wheel Changing) **203.2mm
  • Smallest Programmable Movement - Linear0.0001mm
  • Linear Axis Glass Scale Feedback Resolution0.00001mm
  • Smallest Programmable Movement - Rotary0.0001°
  • Rotary Axis Feedback Resolution: A-axis0.000068°
  • Rotary Axis Feedback Resolution: B-axis0.00000006°

NUMROTO Software

NXT grinders feature the lastest Flexium + CNC solution with NUMROTO, 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 tools and wheels, 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 CAD 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 SU delivers world-class gear cutting tools, advanced coating technologies, and engineering expertise that help manufacturers improve precision, productivity, and performance. Driven by decades of innovation and global expertise, we engineer complete solutions that support the evolving demands of gear manufacturing worldwide.


5200 Prairie Stone Parkway
Suite 100
Hoffman Estates, IL 60192 USA

Tel. (847) 649-1450
Fax. (847) 649-0112