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Home / NEXT-GENERATION ROTARY INDEXER IS LEAN AND MEAN

NEXT-GENERATION ROTARY INDEXER IS LEAN AND MEAN

The evolution of the Hardinge 5C rotary system began in 1901 with the production of Hardinge’s first 5C collet. Hardinge introduced the 5C “threaded-nose” spindle in 1940 on a precision bench lathe. In the 1960s they manufactured a 5C manual indexer using their threaded-nose spindle and collet closer design.

Posted: April 30, 2008

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The evolution of the Hardinge 5C rotary system began in 1901 with the production of Hardinge's first 5C collet. Hardinge introduced the 5C "threaded-nose" spindle in 1940 on a precision bench lathe. In the 1960s they manufactured a 5C manual indexer using their threaded-nose spindle and collet closer design. Later the 5C rotary system was manufactured based on their original 1960s mechanical design. Today, Hardinge takes the 5C indexing market to the next level with more accuracy, more spindle clearance, more axial load and more radial load with their 5C2 Rotary Indexer.

Hardinge has streamlined their indexer body to a curved front casting over the spindle and has made the handle removable for increased spindle clearance and tool access. Their new robust, dual-bearing spindle accommodates heavier radial and axial loads increasing overall indexing capabilities. 100 lb (50 kg) part weight and 1000 lb (4448N) tailstock thrust per spindle is not a problem – even on a quad unit with tailstocks. A hardened and ground steel worm gear with cross-axis helical gears and a hardened and ground steel worm drive shaft provide high accuracy and reduced wear. Double eccentrics provide the finest gear mesh adjustment. Hardinge has lowered the backlash range and improved accuracy overall. The customer can perform future gear wear compensation for extended life and improved accuracy over time. The 5C2 unit takes the field with a ±4 arc-sec repeatability, ±25 arc-sec accuracy and a maximum runout of .0002 in (.005 mm) TIR. Each unit shipped contains a printout of accuracy – final inspection is performed using a Heidenhain encoder mounted directly on the spindle nose to assure final positioning accuracy and repeatability.

Hardinge offers three collet closer options to best suit the shop requirement. The pneumatic fail-safe closer provides 1760 lb (798 kg) of drawbar force and features a 27mm thru-hole. The pneumatic high-force closer allows reduction of gripping force for delicate parts. The manual closer is lever-operated with 950 lb (431 kg) of drawbar force. It is easy to integrate the 5C2 Rotary Indexer into your CNC manufacturing application for true 4th axis interpolation. This system is compatible with Fanuc, Siemens, Heidenhain, Hurco, Milltronics, Fadal, Haas Yaskawa and other CNC systems. The 5C2 is industry compatible for drop-in replacement with fast 360°/sec indexing speed. The design incorporates a collet-ready spindle for total gripping flexibility. Collets, step chucks, expanding collets and manual jaw chucks can be used without the use of an adapter. This allows a wide variety of gripping options to handle most part sizes, shapes and materials. 5C2 Rotary Indexers are available in single, dual, triple and quad configurations with or without tailstocks. www.hardingetooling.com

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