March 19, 2013
Hardinge Group, the world’s largest manufacturer of spindle tooling, announces the release of the 80mm FlexC™ vulcanized collet system. The collet chucks mount directly to the machine spindle. The 80mm vulcanized collets are inserted and removed with a manual compression wrench for collet changeover in less than ten seconds. That’s 8x faster than it takes to change a collet in a standard collet chuck and 19x faster that it takes to change three jaws on a jaw chuck.
But quick changeover is not the only benefit of this system. The FlexC collet system falls in the “special accuracy” collet classification having guaranteed accuracy within .0004″ (.010mm) TIR for style A (pull-back Dead-length® stationary stop) and .0008″ (.020mm) TIR for style DL (push-to-close). These systems achieve the same gripping capability as conventional collets while using less draw bar force. Additionally, the all too frequent variation in bar stock will no longer be a hindrance. The collet head has a gripping range of ±.020″ (.5mm) of its nominal size to allow for variation in bar stock without having to change the collet. Because there is no collet body, the collet segments will remain parallel to the stock even when there are variations in the bar stock. This parallel clamping insures full bearing contact with the part for optimum holding power and reduced push back.
The Hardinge FlexC collet system is an ideal substitute for 3-jaw chucks because it weighs less, has a lower profile and changes over much faster. Hardinge FlexC collet systems are interchangeable with other brands on the market. Consider the FlexC collet system over other conventional collet adapters to meet special accuracy requirements, or mount it on a chuck-style lathe or rotary indexer for increased versatility. Collets are available in round and hex smooth, round and hex serrated, square smooth, emergency and S-master styles.
For more information contact Hardinge via firstname.lastname@example.org or visit http://www.shophardinge.co.uk
March 5, 2013
Hardinge, well known in the industry for their SUPER-PRECISION® products, provides gripping solutions for machining small diameter parts for medical component manufacturing. One category of products includes Swiss-type headstock collets, pickoff collets, carbide guide bushings, bar loader collets and custom manufactured solutions for Swiss turning.
Their Swiss-type collets are finish ground to provide a smooth, concentric gripping area (order hole) for the bar stock or work piece and are inspected on a Hardinge SUPER-PRECISION® (.000015” TIR) headstock to assure strict concentricity standards. Hardinge stocks headstock collets, pickoff collets and guide bushings in many styles and sizes. Their standard round guide bushings are carbide-lined to keep the stock clean and unmarked. Hardened steel or Meehanite-lined bushings can be made for certain stock that is not compatible with carbide. Standard extended-nose headstock and emergency collets feature added length (straight or tapered) for doing pickoff work or to compensate for tooling interference. Emergency collets can be machined to the desired bore size right in your shop to accommodate small runs or get you by in a pinch while they ship your desired size collet.
Keeping bar stock unmarked, holding a small diameter on center, holding a thin-wall part, ejecting parts and working with extruded bar shapes are common gripping dilemmas for the Swiss-turning industry. Hardinge has manufactured solutions for all of these problems. They provide special accuracy order holes of .0005” or better for holding strict tolerances, as well as micro-inch finish order holes. They manufacture collets and guide bushings for D-shaped and other extruded shapes, along with pickoff collets with a built-in spring ejector that pushes the part into a basket or conveyor to automate the process. Hardinge has engineered pickoff collets for Citizen, Star, Tornos, Tsugami and other Swiss-type machine applications. Other special Swiss-application collets include stepped, tapered, chamfered, radius & off-center order holes, and over-the-shoulder collets. Additional gripping dilemmas such as short gripping, non-marking, slippery materials, push back, tool clearance, multi-pass machining, large diameters and matched keyways are not a problem for Hardinge.
Hardinge supports most styles and brands of Swiss machines
March 5, 2013
Medical part manufacturing continues to be a rapidly growing market due to the large population of aging baby boomers who are looking for “improved quality of life”. Demand is high for high-precision components for neurological, orthopeadic, spinal/bone fixation, dental implants, drug infusion, catheter connectors, optical, maxillofacial, micro/minimally invasive, surgical instruments and other medical devices, most of which can be manufactured on the Hardinge QUEST® SUPER-PRECISION® GT27 gang-tool turning center.
The Hardinge QUEST® SUPER-PRECISION® GT27 gang-tool turning center is designed for machining small diameters, complex and tight tolerance parts, and other challenging requirements. The GT27 offers a continuous machining accuracy of .0002” on diameter, part roundness variation of .000015” and part surface finish of 8 micro-inch, and has proven to be indispensible to some of the best medical manufacturing companies in the world. Bar work up to 1-1/16”/27mm and chucked parts up to 4” in diameter (using a step chuck) can be machined on the GT27 today, with the ability to hold the same accuracy ten years down the road.
The Hardinge GT27 is unlike all competitive gang-tool machines in that it includes their patented interchangeable top plate and their world-renowned, quick-change collet-ready spindle. The top plate secures to the dovetailed cross slide and is interchangeable for quick and accurate tooling changes that can be performed in under a minute. Pre-tooled top plates can be quickly interchanged within .0002” repeatability to produce a new part or family of parts. Hardinge’s patented collet-ready spindle provides maximum rigidity and gripping power because the collet seats directly in the spindle with minimum overhang from the spindle bearings. In this design the spindle accuracy is transferred directly to the workpiece. Additionally, the patented HARCRETE® machine base is 10% stiffer than cast iron, resulting in improved dynamic stability with one-third less vibration at the spindle and a 30% increase in tool life. This provides significantly better part surface finishes than cast iron. Size repeatability, surface finish quality and thermal stability are hallmarks for Hardinge lathes.
The Hardinge GT27 can be used as a stand-alone unit, a higher capacity system with a bar feed, or as a fully automated system with a robot. This machine is an excellent complement to a Swiss machine shop to handle parts that require higher precision. Bar whip or chatter that may be found to some degree in Swiss turning, is not an issue with the GT27 because the bar or chucked part is gripped close to the spindle bearings. For more information call 0116 2869900 or visit http://uk.hardinge.com/index.asp?pageID=64&cID=5