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G5 – Granite compact milling center

G5
Granite and Optical Linear System

A compact milling center machine developed specifically for the European dental industry, which is comprised of a large number of relatively small laboratories. It is a milling machine with fully automatic tool change, able to create any item (crowns, bridges, models, screw-retained bridges, abutments, connection bars, surgical stents, etc.) in all materials (wax, PMMA, various resins, composite material, pre-sintered zirconia or aluminium oxide, lithium disilicate, titanium (grade 2 and 5), CoCr alloy, etc.).

Zirconia
Various resins
PMMA
Titanium (grade 2 and 5)
CoCr alloy

A sturdy construction in carefully polished natural granite from South Africa, on three axes (X, Y and Z) plus 2 rotary axes to angle the milling disc. Movement is via linear actuators, which include precision ball screws, with backlash recovery. All 5 axes are interpolated continuously and moved by electronically controlled brushless digital motors, with automatic current and position management.

Optical linear encoder (precision 1 = 0.001 mm) on the X, Y and Z axes and absolute optical encoders on two rotary axas (precision 0.00012 rad) guarantee durable precision.
Fast-locking disc holder for standard discs (98.5 mm). Standard tool magazine with 16 positions (optional 20) with the possibility to manage duplicates.

G5 – The solution

Free, open system

Standard file formats are used for input and output, meaning that clients are not tied to any specific brands/models when choosing the rest of the equipment.
There are no constraints in the use of specific materials and/or tools and no obligations in terms of annual fees for software upgrades: upgrades are recommended but even if they are not bought, the software will run forever.

Optical linear encoders on the 3 cartesian axes

The optical linear encoders continuously read the actual position of each exis with precision of 1 u (0.001 mm).
The control system checks each one of them up to 1,000 times per second, instantly correcting the position of the single axis.

5-Axis simultaneous machining

5-axis simultaneous machining: essential for modern implantology, which places the implants in optimum position and at the optimum angle.
On traditional jobs, however, 5 axes are useful to place the prosthesis to be milled in the disc, minimizing thickness (higher speeds, lower consumption of materials and less tool wear)

Jäger spindle

2.1 kW and 50.000 rpm
A reliable German manufacturer and market leader: for guaranteed quality, performance and durability with excellent milling results at low speed (e.g. CoCr alloys) as well as at high speeds (e.g. lithium disilicate). Liquid cooled via external unit (provided).

Unique specifications

Weight800 Kg
Position Precisionlinear: optical encoder ± 0,001 mm (1 μ)
rotazionale: encoders ± 0,00012 rad
SpindleJäger, 2,1 Kw, 10-50.000 rpm
Tool positions16 positions, cone change (opt.20 positions)
Tool Measurement sensor ± 0,001 mm (1 μ)
Rotating AnglesA = ±30° C = 360°
DiscsØ = 98,5 mm with step

WE BUILD OUR MACHINES IN ITALY
ALL KEY COMPONENTS OF OUR MACHINES ARE
MADE IN ITALY, GERMANY, JAPAN.

G5 Mills All Materials

WET MACHINING

Machining hard materials such as titanium and CoCr needs lubrification. The machine has two filters and a holding tank with recirculation pump. The water level is visible on the
tablet PC.

DRY MACHINING

Materials such as zirconium dioxide are better dry-machined, but the dust from these processes is harmful to moving parts.
Therefore, the machine is fitted with airtight protective bellows on all axes. Connection to a central extraction system will prevent any machining dust from entering the environment.

EASE OF USE

Controlled
by Tablet PC

The milling center is controlled by a removable, touch-screen tablet PC with an intuitive interface which is very easy to use. It is developed specifically for dental technicians: all of the machine control functions in a single device. Possibility of remote control thanks to a special software (included).

15 (Or 19) Tools
Always Ready For Use

With the 16 (or 20) positions of its integrated tool holder, you have up to 15 (or 19) tools always ready to be used; the CAM software will select the correct one for each process on its own, even when you change material. It is also possible to manage copies of some tools (back up).

Precise And Offline
Tool Fitting

A reliable German manufacturer and market leader: for guaranteed quality, performance and durability with excellent milling results both at low speed (e.g. Cr-Co alloys) as well as at high speeds (e.g. lithium disilicate). Liquid cooled via external unit (provided).

DENTAL MACHINE G5
MAXIMUM PRECISION AND RELIABILITY

CONSTRUCTION DETAILS

OPTICAL LINEAR ENCODERS ON THE 3 CARTESIAN AXES

The optical linear encoders continuously read the actual position of each axis with a precision of 1 micron (0,001 mm). The control system checks each one of them up to 1,000 times per second, instantly correcting the position of the single axis.

JÄGER  SPINDLE 2.1 KW  50.000 RPM

A reliable German manufacturer and market leader: for guaranteed quality, performance and durability with excellent milling results both at low speed (e.g. Cr-Co alloys) as well as at high speeds (e.g. lithium disilicate). Liquid cooled via external unit (provided).

PLANETARY REDUCTION GEARBOXES

Planetary reduction gearboxes are essential to ditribute the load across 3 planetary gears instead of just one; helical teeth mean no backlash virtually, which is impossible when using any traditional system. Lifelong lubricated.

ABSOLUTE ENCODERS ON THE 2 ROTARY AXES

Rotary encoders have as the same function for rotary axes as linear encoders have for linear axes. The control system reads them and instantly corrects the angle of the single axis.  The precision is 0.00012 radians.

PRE-LOADED RECIRCULATING BALL SCREW

The linear axes are moved by pre-loaded, ground recirculating ball screws, controlled directly by brushless motors with position feedback to guarantee precision and durability. Lifelong lubricated.

STEINLESS STEEL

As a guarantee of hygiene and durability, all parts in contact with recirculating liquid are made in virtually indestructible stainless steel.

G5
the only one with granite on all three axes

Granite

Granite is a volcanic rock, used since ancient times in different architectural and urban contexts for sculptures, gravestones, sarcophagi, statues, memorial and noble buildings. Since 1800 it has also been used as a base for measuring instruments and – in more recent times – for kitchen tops and elegant flooring, exploiting its characteristics of:

  • High dimensional stability – it is a material with no inner tensions (4 billion years seasoning…)
  • High thermal stability: its linear thermal expansion coefficient is far lower than those of cast iron or steel
  • High resistance to wear
  • Harder than tempered steel (6-7 on the Mohs scale)
  • Resistance to acids and oxidation
  • Non magnetic and electrically insulated

Moreover, granite shows a macro-granular matrix, absorbing the vibrations created by hard-material machining (such as chrome-cobalt or titanium), which could deteriorate the part quality and reduce the life of the tool.

Why 5 axes

Modern oral implantology places the implants in optimum position and at the optimum angle for each specific implant. Thus the manufacture of the prosthesis needs a 5-axis machining; better if the axes have a simultaneous movement.
However, 5 axes are useful on traditional jobs to place the prosthesis to be milled in the disc, minimizing its thickness (higher speed, lower consumption of materials and less tool wear). The lower cost of a 4- axis machine does not justify its limits; thus dental Machine stopped manufacturing 4-axis machines some years ago.

Dental Machine Srl
Sede legale: P.za San Francesco 11
Sede operativa: Via dell'artigianato, 15 - 29022 - Bobbio (PC) - Tel: + 39 0523 93.66.04
REA PC-176917 - C.F./P.IVA 01607130331