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Hardinge has introduced a low-profile rotary table featuring a collet-ready 16C spindle that provides high-precision gripping options.

According to Al Comstock, the company’s rotary product manager, the spindle nose has been extended to provide additional tooling clearance.

Minimal overhang from the spindle bearings ensures that spindle accuracy is transferred directly to the part being machined.

Most brands of rotary tables use a collet adaptation chuck, moving the cutting several inches away from the spindle bearings.

Hardinge rotary spindles, on the other hand, are collet ready for gripping parts of all shapes, sizes and materials.

High-precision gripping options for the new GD210LP include standard 16C collets, step chucks for larger diameters, Sure-Grip expanding collets and custom collets with the use of an optional collet closer.

Special-accuracy FlexC collet systems, chucks and the precision-ground faceplate (included) will mount on the A2-5 spindle.

As a result, higher-accuracy jobs can be run and there will be less tooling interference.

There are length control options, an internal gripping capability, no time-consuming fixtures and lightweight alternatives for a heavy chuck.

The added versatility and the ability to share tooling with other machines in the shop is said to be beneficial.

The Hardinge GD210LP rotary table indexer is claimed to provide rigidity, speed, accuracy, repeatability and flexibility in an affordable package.

High stiffness and super rigidity are accomplished with large-diameter bearings and a failsafe clamp system, allowing part weight of up to 220lb.

Radial load testing indicated a stiffness of four times greater than a competitive model.

The GD210LP uses up to 233ft-lb/315Nm of clamping torque to handle off-centre drilling, cross-axis milling and other high-force cutting applications.

A fast clamp and release in milliseconds is intended to reduce cycle times.

Hardinge’s hardened and ground steel cross-axis helical gear provides a longer life and continued accuracy when compared with the softer gears and worm gears found in other brands.

Based on true bidirectional testing, Hardinge ensures +/-15-arc-second accuracy and 10-arc-second repeatability.

The GD210LP operates with a Hardinge servo control or it can be integrated to the machine via the fourth axis.

Options include a left- or right-hand motor mount, a pneumatic collet closer, a tailstock and a plate or cube trunnion for machining multiple parts.

Hardinge Machine Tools

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