Before he became a practicing dentist and even longer before his entrepreneurial spirit gave rise to PartMaker— a West Heidelberg, Australia-based precision part manufacturing firm, native Australian Dr. Chris Hart had already fallen in love with Switzerland. Swiss dental training improved his scope of practice and now, Tornos’ Swiss-made single-spindle lathes are helping him redefine Australian manufacturing
An experienced prosthodontist specialising in pioneering practical and cost-effective solutions, Hart has made a name for himself as an innovator and leader in his profession. After earning his Bachelor of Dental Science from the University of Melbourne, he built up his expertise in a variety of patient care environments by working as a dentist. After earning his Master of Dental Science degree, he was selected to be part of an international team of implantology scholars, an accolade that took him to the University of Bern in Switzerland, where he was mentored by world-renowned faculty member Professor Daniel Buser at the university’s dental medicine clinic (ZMK) and in the university’s department of surgery.
Upon returning to Australia and working in both private practice and hospital settings, Hart discovered that he couldn’t find adequate prostheses to serve the functional needs of oncology patients. So, he decided to make those parts himself. Thus, PartMaker was born in 2012.
Describing himself as ‘an engineer trapped in a dentist’s body’, Hart’s entrepreneurial spirit is driven by his passion to make a real difference in patients’ appearance, comfort and confidence. “Before we started making our own parts, we were heavily modifying existing parts. That means we were basically butchering really well-made parts in order to remedy simple problems, like patients not being able to open their mouths wide enough to accommodate available screwdrivers,” he explained.
The solution was obvious. Hart started making his own parts and instruments. “Back in 2012, we started making everything with milling machines. I even went to night school and earned a certificate in CNC programming, so I could get a better understanding of manufacturing technology,” he said. Hart never intended to buy a lathe, but he found in short order that the dental implants and maxillofacial hardware he needed to produce were beyond the capabilities of simple milling.
“With so many dental parts being too long or too short, and with existing systems going in and out of fashion, I really saw a need for bespoke, custom dental and biomedical parts,” he said. Implants require turned parts, so among PartMaker’s early purchases were a Tornos ENC 264 four-axis lathe and a Tornos Delta 20. “Being new to Swiss-type turning and CNC machining as a whole, we had a pretty small wish list of parts to make. Peter Staebner at Tornos’ agent SwissTec Australia was instrumental in helping me get our first few parts made with the Delta 20. I would go in to the shop after work and Peter helped me on the weekends, and we got our wish list accomplished,” Hart said.
Before too long, Hart saw that Tornos’ Swiss-type technology opened up a whole world of possibilities. Even running the Delta 20 all day, they were limited in the parts they could produce. Enter the simple and ergonomic Swiss GT13, offering easy access to all tool positions and designed to drive successful production of long and short parts. “It has six linear axes, so it allows us to make some parts that we can’t produce on the Delta 20, and we can use 99 percent of our existing programming with the new machine,” said Hart. “The Swiss GT 13 is so much easier to use than our old machine.”
Forty percent cycle time savings
Accommodating up to 30 tools, including 12 rotating tools, the Swiss GT13 has a Y axis that significantly increases machining capability in secondary operating and allows some complex workpieces to be produced without reworking. Hart pointed out that the new machine is slashing PartMaker’s cycle time on many parts simply because of the additional access it provides. “It’s easier to set up and its cycle times are significantly faster. In fact, because of the easier access, we’re saving 40 percent in cycle time on a lot of parts. I know we’re not using our Swiss GT13 to its fullest capabilities yet, but that’s the goal. It’s already optimising our manufacturing,” he said. “Now that we have two machines running, our ability to keep on top of orders is significantly improved. It has enough tool positions that we’ve got it set up to make families of parts for the three main lines we make.”
Significantly faster programming
Moreover, Hart is impressed with Tornos TISIS communication and programming software. “With TISIS, it’s a lot easier to generate programs for our parts because we are really just assembling programming modules. The software is easy to use and I estimate that it is saving us 50 percent in time spent on programming because we are not writing a new program for every part to be produced.”
To say that Hart is pleased with his purchase is an understatement. One example, he says, is the ‘amazing job’ the new machine does with an original PartMaker dental abutment featuring a complex taper geometry, external threading and a milled octagon. The part, with its M1.4 thread to a depth of 4mm through a 1.2mm by 1.5mm deep hexagon is easily executed with the addition of the Swiss GT 13. In fact, PartMaker has become so productive with its Swiss GT13 that Hart has ordered an optional bar feeder.
“We are achieving results that we thought existed only in technical drawings,” Hart exclaimed. For the past five years, we’ve been relying on our own homemade bar feeder, but today we’re chewing through the bars a lot faster,” he said. With Tornos technology, SwissTec expertise and his own ingenuity, Hart looks to the future with confidence.
“I have a dream for PartMaker to end up with six Tornos lathes and four milling machines,” he said. “Of our customers, half are international, from the US, Canada, Taiwan and Mexico. With the increasing uptake of computer-aided design and computer-aided manufacturing in dentistry, dentists are realising possibilities of what’s available from dental implant companies, so we know the potential for custom machining is there.”