PERFORMANCE CLASS

N4+: Full efficiency in wet processing.

Your top performer in the laboratory for wet grinding and milling of blocks and titanium abutments.

Visibly different, noticeably better: with water-cooled spindle.

Thanks to its striking, updated look, the new N4+ is an eye-catching choice in any laboratory. We have also equipped it with a water-cooled spindle. That means you benefit from improved process stability, and you can always rely on first-class results even in continuous operation.

Axes

Discs

Blocks

Tools

Axes

Discs

Blocks

Tools

“The N4 is the best possible entry into same-day dentistry and it has exceeded my expectations. It is extremely precise, fast, and it even mills titanium abutments – I work with it nearly every day and it has never let me down. For me, the N4 is the ideal machine for all practice labs who want to provide quality restorations to their doctors quickly and easily.”

Janine SparksCDT at University of Maryland Baltimore School of Dentistry

“I was surprised how easy to operate and how reliable the N4+ is. The workflow is unbelievably fluid, in particular when milling disilicate crowns on implants, veneers, and inlays.”

Ricardo SchäferFounder and Manager of Schäfer Dental+Lab, Buenos Aires

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Highlights

The essence of wet grinding

The N4+ is an efficient wet processing machine for grinding and milling glass ceramic, composite, and zircon blocks, as well as CoCr and titanium abutments. It impresses not only thanks to its high precision and fast drives, but also thanks to its ultra-compact housing with closed fluid circuit. Eight fine nozzles on the spindle direct the cooling liquid precisely onto the effective area between the tools and workpiece, delivering an optimal cooling effect.

Tool changes in a flash

The tool magazine can be inserted quickly and effortlessly in just one step. The automatic changer offers space for up to eight tools. The three compartment block holder is another highlight. That makes the N4+ the ideal partner for research and practice laboratories.

Outstanding precision

Scientists at the University of Washington confirmed an outstanding precision of −10 μm to +26 μm during demanding applications like milling titanium abutments.

Closed fluid circuit

The large fluid tank can easily be removed from the drawer.

For a variety of indications

For crowns and bridges, inlays, onlays, abutments, veneers, table tops, etc.

Features

Exceptional precision

Restorations in Ultra HD
Premium spindle with four-fold ball bearing made of hybrid ceramic for the highest concentricity
3 μm repetition accuracy

Absolute independence

Around 40 block materials from a great variety of manufacturers – with upward tendency
> 1,300 implant platform for titanium and CoCr prefab abutments from different manufacturers
Ideal for labs and in-office labs

Sophisticated design

Spindle with water cooling for perfect results, even in continuous operation
Eight liquid nozzles for steady tool cooling
Highest rotational speeds of up to 80,000 rpm with 800 watts of power
Heavy industrial quality

Outstanding reliability

100% developed and manufactured in Germany
24 months warranty

Highly economical

purewater: no grinding additives necessary, except for titanium processing
Work on up to 3 blocks with 45 mm length at the same time
Milling of screw channels – saves costs for “meso” blocks
Conveniently removable cooling liquid tank
Automatic changer for 8 tools
Webcam in working chamber for remote monitoring and service
Ethernet interface for stable connection
Very easy operation via dentalcam software with directmill Technology – included in scope of delivery and without license fees

Did you know?

vhf has been using high-quality 4-fold hybrid ceramic bearings for over ten years, particularly for machining metals. For you, this means a significantly longer spindle service life, higher surface quality and noticeably better accuracy of fit.

Material, manufacturer, indication.

Enjoy the freedom of choice.*

Indication

Crown \| Bridge	Inlay \| Onlay	Veneer
Occlusal splint	Full denture	Denture framework
Implant bar	Abutment	Screw-retained crown
Screw-retained bridge	Surgery guide	Primary crown
Secondary crown	Model plate	Model tooth die

Material

Composites
Plastics \| Wax
Glass ceramics
Zirconia
Titanium
CoCr

*Be sure to review local and/or national regulations and/or regulations by other authorized organizations or entities (e.g. professional associations, health authorities)

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N4+: Full efficiency in wet processing

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Comparison overview: Milling and grinding machines

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Technical Data

GENERAL

Fields of application

Wet machining

Materials

Glass ceramics, titanium, zirconia, composites, plastic materials – Blocks up to 45 × 20 × 20 mm

Indications

Crowns, bridges, fully anatomical crowns and bridges, inlays, onlays, abutments, veneers, table tops

BASE SYSTEM

Construction

Machine bed made of solid cast aluminum body

Housing

Sheet steel housing, white high-gloss lacquer finish, with working chamber flap and cooling liquid tank integrated in the drawer

Number of axes

Linear axes X-/Y-/Z-axis

Precision ball screws, rolled version · motors with resolution < 1 μm · ground precision guides made of steel · repetition accuracy ± 0.003 mm

Rotary axis A-axis

Rotary axis with high run-out accuracy · rotation angle: 200°

Control unit

4-axis simultaneous control electronics with continuous path progression and dynamic pre-calculation · hardware-based real-time operating system with standardized command set · FPGA-integrated processor · updateable hardware · real-time path calculation via dedicated hardware engines in the FPGA · four-quadrant control of the motors for particularly smooth running · multiple analogue and digital I/Os for controlling the peripherals · integrated inverter for synchronous and asynchronous motors, electronic gate detection · Ethernet and USB interface

Lighting

RGB LED lighting with status display

Camera system

Integrated in the working chamber for easy remote support and possibility of internal recording

SPINDLE

General

High-frequency spindle, synchronous, with pneumatic tool clamping · sealing air to prevent debris from entering · automatic cone cleaning

Speed

Up to 80,000 rpm

Power

Peak power (Pmax): 800 watts · nominal power (S6): 600 watts · continuous power (S1): 440 watts

Bearing

4-fold hybrid ceramic ball bearing · concentricity deviation at inner cone < 3 μm

Collet

Stainless steel collet with ceramic coating for tools with 3 mm shank diameter and max. 35 mm total length

AUTOMATION

Tool change

Tool magazine for 8 tools, removable · length measurement and tool breakage monitoring via precision measuring key · access through working chamber door, safety lock

PROCESSING MODES

Wet

Multiple fluid nozzles on the spindle · integrated cooling liquid tank (3.5 litres) with active carbon filter system · flow-sensor for monitoring the liquid supply · purewater: no grinding additives necessary, except for titanium processing

CONNECTION REQUIREMENTS

Compressed air

4 bar: 25 l/min up to 8 bar: 45 l/min · air purity according to ISO 8573-1:2010

Power

100 · 240 volts · 50/60 Hz, 640 watts

Data

10/100/1000 Mbit/s BaseT port (auto-sensing) Ethernet via RJ-45 socket

ENVIRONMENTAL CONDITIONS

Operating temperature

Between 10 °C and 30 °C

Air moisture

Max. 80 % (relative), non-condensing

APPROVALS

All models

CE, VDE

North America model

UL 61010-1, CAN/CSA C22.2 No. 61010-1 (pending)

DIMENSIONS & WEIGHTS

Dimensions (W/D/H)

364 × 460 × 473 mm · 364 × 667 × 473 mm with open flap and drawer

Footprint (W/D)

337 × 324 mm

Weight

52 kg

SCOPE OF DELIVERY

CAM Software

dentalcam software included

Holder systems

Abutment holders for various systems (optional)

Accessories

Spindle service set · calibration set incl. micrometer · Tec Liquid set · brush for nozzle plate · cleaning brush · spare fine filter · active carbon pellets · Tec Powder (3 bags) · tool magazine inserts (2 pieces) · spare screws blank holder · torque wrench · emergency release key · drill bit (tool positions) · measuring pin · compressed air hose with pressure reducer · power cable · Ethernet network cable · carrying aid for transporting the machine · operating manual