NB 151

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NB 151

Dedicated kinematic concept for efficient Blisk roughing or finishing.

Expansion of the spindle through thermal drift or centrifugal forces can constantly be measured and compensated for by direct measurement.

The NB 151 offers a superior accessibility for all kinds of multi-blade parts, be it blisks, impellers, diffusors or nozzle guide vanes.


5-axis Blisk machining center

No matter if it is called a «Blisk» (bladed disk) or an «IBR» (integrally bladed rotor), no matter if it is single stage or multi stage, Starrag’s dedicated machine concept of the NB 151 provides the best solution for efficiently machining of these parts. Blisks made from Titanium, Nickel-based superalloys and the Blisks made of blade steels for stationary gas turbines triggered the development of the NB 151. The challenges posed by the thin, unstable airfoils are easily met by the new productive manufacturing approaches that Starrag provides. For all the necessary manufacturing operations Starrag provides the benchmark: Efficient roughing for Blisks machined from solid, adaptive machining for friction welded Blisks, high dynamic finishing of the airfoils in point contact. Shortest cycle times and zero scrap rate production are what the Starrag NB 151 stands for. The NB 151 is based on the very successful Starrag LX series.

Technological competence:

- Optimized kinematic concept
- Expansion of the spindle through thermal drift or centrifugal forces is constantly measured and compensated for by direct measurement
- The effects of machine displacements due to thermal drift can be corrected directly on the workpiece
- Non-machining time («air cut») on forged blanks is eliminated
- Adaptive machining of blade edges and snubbers on precision-forged blades that blend seamlessly to the finished airfoil

Axis configuration

Innovative Solutions

Construction principle

  • Minimized and balanced movement of the masses
  • Short distribution of forces increases rigidity, leading to stable ratios during the machining process. These factors have been proven in real-time simulation during the machine development phase
  • All base frame components are designed using FEM analysis for maximum rigidity"

Highly dynamic rotary axes

  • The rotary axes are directly driven by state-of-the-art torque motors
  • Guarantees the most precise positioning
  • High torque even at low speed
  • Highest possible rigidity for maximum dynamics
  • Power transmission free of backlash and extended service intervals
  • No mechanical component wear
  • Driven tip station with controllable torque

Spindle fast connectors

  • Fast connectors to reduce time for spindle change
  • Starrag made spindle
  • Monitoring of vibrations, displacements and temperatures
  • Compensation of displacements for better process reliability
  • Spindle interlock for mill-turning


  • Large door and viewing window
  • Easy loading with crane
  • Transportation as a complete unit, with all auxiliary units fully integrated within the machine

Control and system capability

  • Contour fidelity during high-speed machining through look-ahead feature and dynamic preselection
  • Drive parameter adjustment depending on the machining
  • Control cabinet with air conditioning unit
  • Control behavior and NC path planning are developed and optimized in great detail to achieve the perfect combination of geometrical accuracy, surface quality and of course productivity.
  • Depending on the required application, the machine can be optimally configured using five settings: roughing, pre-finishing, fast finishing, finishing and super finishing.


Work piece measuring

  • Intuitive and easy to use, fully integrated into PSI+ CAM System
  • consistent integration of CAM system
  • probing
  • automatic adjustment

Highly recommended for a reliable and accurate production

  • zero reject rate

Tool measuring

  • Detection of tool breakage
  • enhanced process stability
  • avoiding machine collision

Measuring of tool length and radius

  • enhanced process accuracy
  • enhanced process stability

Detection of incorrect operation

  • avoiding machine collision

Fixturing concepts

The special work-piece geometries create specific demands on the clamping fixtures. Starrag has in-house specialists who develop individual clamping concepts to meet the specific requairement of blade machining. Starrag offers the following advantages:

  • A single adapter design solution for all NB machine sizes
  • Application specific clamping devieces for best in class machining performance
  • Geometric deviations between multiple fixtures can be stored in the control system.

Tool handling

Tool magazines with 60 or 80 pockets. Tool storage is expandable up to 320 tools ( HSK-A63)

Workpiece handling

  • Workpiecechanger for convenient preparation of raw material parallel to processing time
  • automatic check of raw material length during AWC for enhanced process security

Chip removal

  • Optimized swarf flow directly into the chip conveyor
  • designed for wet or dry machining

Optimal process cooling

One key factor to lowest tool cost and highest productivity is the right process cooling. The NB machine series offers all state-ofthe- art through-spindle cooling options:

  • High pressure coolant (water-based or oil)
  • Through spindle air
  • Aerosol (minimum quantity lubrication)
  • CO2 cryogenic cooling through the spindle
  • Aerosol plus CO2 through spindle

Of course external cooling with coolant or CO2 is possible too. With these options, breakthroughs in tool life can be achieved, leading to the lowest overall cost.

Additional equipment

  • emission extractor
  • Starrag connect
  • rotating disk window
  • conditioning unit for compressed air
  • camera system
  • handheld unit
  • compresser temperature cooling unit
  • increased geometric accuracy
  • remote diagnosis
  • warm up program
  • energy efficiency

Maintenance friendly

  • any component requiring periodic service are easy accessible
  • replacement items e.g. filters, wipers etc are easy to access
  • machine components require service are simply to access and repair
  • safe working areas for maintenance personal e.g. platforms and attach point are provided
  • condition based machine monitoring to predict future component failure

Everything from simply part storage to most complex flexible manufacturing systems – even of the largest machines. The Starrag Group makes Industry 4.0 a reality. Read more

Technical Data

Number of Spindles 1
Max. Blisk Diameter mm 620
X-Axis mm 650
Y-Axis mm 650
Z-Axis mm 600
A-Axis degree 360 endless
Swivel B-Axis degree -240°/ +60°
Linear Axes X/Y/Z m/min 62
Rotary Axis A U/min 200
Rotary Axis B U/min 60
Motor spindle, max. speed rpm 18 000
Power at 100% duty cycle kW 28
Torque at 100% duty cycle Nm 181
Tool Taper HSK-A63 (A80)
Max. Tool Weight kg 10
Max. Tool Diameter mm 160
Max. Tool Length mm 250
Tool Deposits / max. Number of Tools 60 / 320
Tool Chance Time Double Gripper sec 4.5
Linear Axes P mm 0.006
Linear Axes Ps mm 0.0024
Rotary Axes P sec 6.0
Rotary Axes Ps sec 4.0
Weight kg 13000
Lenght x Width x Height mm 5200x3100x3110
Safety Concept CE-compliant
CNC Control Siemens


A competitive edge through efficient processing technologies

Read success story

Manufacturing blisk rotors in a single clamping operation:

Starrag rounds off its blisk machining range with the Starrag NB 151

Read success story

Service Plus Package

Perfect service for perfect machines

Precondition for above-average productivity, efficiency and economy is a constant high availability of the machine. And necessary for this above all, besides innovative technology, is: A tailored service, which is perfectly coordinated to your individual requirements.

ServicePlus guarantees you machine availabilities of at least 95%!


Our call center staff immediately understands your service requirements and passes them on quickly and appropriately to our technical hotline or to the appropriate service advisor.

Starrag Hotline: +49 371 836 23 68

All Service Products

Spindle overhaul

Overhaul concepts tailored optimally to your requirements

Training courses

Efficient machine operation thanks to optimal training courses

Replacement parts

Fast and reliable supply of replacement parts due to global logistics network


High technical availability through preventive maintenance

Service near you

Time is money! That also applies when it concerns the service and maintenance of your machine. The Starrag Service and Logistics Centres near you have the necessary infrastructure, in order to guarantee you perfect service.

Service Contact

Partnering for Efficiency

Service Plus

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