SIMPLY BRILLIANT HIGH-TECH JEWELRY POLISHING PERFECT SURFACES WORLDWIDE

2 | OTEC – YOUR PARTNER IN THE JEWELRY INDUSTRY We supply more than just machines. We supply reliably reproducible results. This is the combination of technology, process media, precisely coordinated parameters and above all – many years of experience. WE MAKE YOUR BUSINESS SHINE OTEC has been the leading partner for surface finishing in the jewelry industry since 1999. More than 5,000 customers worldwide – from small businesses to global players – put their We work closely together with you to decide which is the most cost-effective and most efficient solution. For classical jewelry finishing,...

Electropolishing guarantees perfect surfaces even in the smallest gaps. Wafer-thin material – laser-cut or stamped, is easily brought up to a high shine. Extremely gentle processes fully protect valuable gemstones and materials during finishing.

4 | OTEC – YOUR PARTNER IN THE JEWELRY INDUSTRY WE SHINE WHEN POLISHING IS DIFFICULT We love challenges. They motivate us to keep on developing and refining our machines and processes so that we can always offer our customers the solution that is absolutely right in every case. Immaculate The multi-stage processes are individually tailored to the particular workpiece so that up to 90 per cent of manual processing can be eliminated, even with complex finishing processes such as polishing hollow chains – but the result remains comparable to hand finishing

Gentle Even in combination with sensitive materials such as pearls, gemstones or enameling, highluster surfaces can be obtained with no risk to any of the components, and irrespective of the design of the workpiece. Filigree The newly developed electropolishing system puts a shine on previously inaccessible areas. This easily gives a much more detailed and brilliant finish to complex workpieces – without using any hazardous chemicals whatsoever. Tolerant There is virtually no limit on how thin the material can be. The unique OTEC zero-gap system even enables wafer-thin workpieces to be reliably...

6 | OTEC – YOUR PARTNER IN THE JEWELRY INDUSTRY OUR COLLECTION FOR YOUR PRODUCTION Whether you are looking for a stand-alone solution or want to set up a production line – the OTEC CF series will always have the right machine for demanding jewelry finishing in any batch size. All machines in the CF series work on the disc finishing principle whereby the workpieces are immersed in a drum-shaped container filled with grinding or polishing granulate and a disc in the base of the drum is made to rotate. The disc is separated from the wall of the container by means of an adjustable gap. The effect...

OTEC CF Standard Suitable for wet/dry finishing rocess container with hot molded PU lining P odular system, equipped with 1- 4 process M containers luminum profile frame construction for A easy expansion Speed control via frequency inverter Siemens SPS touch screen control igital display of all relevant process D parameters Memory for up to 75 programs OTEC CF Element Stand-alone machine for both dry and wet processing OTEC CF Element Suitable for wet/dry finishing Process container with hot molded PU lining High-quality steel chassis Display: processing time, elapsed time and speed OTEC CF-T...

Type Container Container Width x Depth x Height Type Container Container Width x Depth x Height Weight Power volume diameter [mm] [kg] requirement Container Container Width x Depth x Height Weight Power volume diameter [mm] [kg] requirement CF 32 and CF 50 models available in aluminium profile frame.

MACHINE AND PROCESS - THE DUAL SOLUTION Ideally working on the basis of a sample workpiece, or alternatively by analyzing photographic data, our OTEC research lab will develop a process specially tailored to your workpiece and your application. Then we create a log documenting all the process parameters. This provides key information which enables us to determine the combination of grinding and polishing media that is just right for you. If you order a machine, this service is free of charge.

GENTLE FINISHING IN INACCESSIBLE AREAS When it comes to polishing intricate details or inaccessible internal contours, electropolishing is the method of choice. The new OTEC EPAG Flexmodular polishing unit combines top quality with great cost-effectiveness. The EPAG Flex modular is an electropolishing unit for yellow, red and white gold, as well as for silver. This electropolishing unit enables filigree jewelry rings to be ground and polished in the shortest possible time. Intricate details remain intact and internal contours receive an excellent finish. Manual polishing is reduced to a minimum...

o Perfect for silver and gold o Reduces manual polishing to a minimum o Gold carried over into the bath during the electropolishing process can easily be recovered by filtering and depositing onto the cathode. o Can easily be expanded to incorporate up to three process tanks o Can process up to 40 workpieces per tank o Workpiece parameter management system o USB port for easy software updates and upgrades o Filter unit for absorbing particles o Completely cyanide-free process EPAG 1 EPAG 2 EPAG 3

12 | OTEC – YOUR PARTNER IN THE JEWELRY INDUSTRY MANY VARIABLES FOR PERFECT RESULTS We find the right parameters for each task, and we supply the right ingredients for The finished quality of any surface depends mainly on choosing the right process media for the machine being used. In each individual case, the process media is selected which is right for the specific workpiece in hand. Processes are divided into wet and dry finishing. In the case of wet finishing, a water/compound mixture is generally used to absorb and carry away the material removed from the workpieces by the abrasive action...

Plastic grinding chips These high-quality grinding chips offer high stock removal rates and a fine surface finish. Their soft bond prevents any hardening or pitting of the workpiece surface. Plastic bonded grinding media are mainly used for the grinding and fine grinding of precious metals. Conical (K) Size aPyramid (P) Size a=b Type Color Grinding effect mm mm M mint green fine grinding to polishing, good stock 6; 10; 12 10; 12; 15 removal, gives very smooth surfaces X* white fine grinding to polishing, specially 10; 12 10; 12; 15 for the jewelry industry O blue intense grinding, medium rough...