世聖精機股份有限公司EXACT MACHINERY CO., LTD.

HC Series
Indexing Tables with a
3 piece Hirth Coupling Gear

NON-LIFTING TABLE TOP WITH
A HIGH PRECISION 3-PIECE
HIRTH COUPLING GEAR
EXTREMELY ACCURATE WITH
POSITIVE MECHANICAL
LOCKING FOR HEAVY
MACHINING

Wide range of styles and sizes
Robust and wear-resistant design
High indexing accuracy and
repeatability values
Resistance to high machining forces
Simple installation with reliable operation
Low maintenance design

The HC series of automatic indexing tables can be used with the table top in either the horizontal or vertical plane and are suitable for use on Machining Centers, Rotary transfer machines and most any other style of production machines and in manufacturing systems. Rotation is by a worm and wheel driven via a servo motor, hydraulic clamping through the 3 piece coupling generates a resistance to high machining forces, add for the ultimate in positioning accuracy and rigidity.

Non-lifting, 3 piece coupling design has a reinforcing holding force and permits a table top that does not raise and lower during indexing. A solid sealing system
prohibits swarf, chips or cutting fluids from entering into housing, this creates reliability and longevity. Hydraulic rack & pinion drive with built-in cushions to ensure smooth operation with optimum cycle times, the table clamp and unclamp functions are hydraulic and monitored for safety by reliable feedback switches.

Function Principles of Non-Lifting Indexing Tables

There are 3 gear rings to each Hirth Coupling
Gear ring A is attached to the rotating table top plate
Gear ring B is the "datum" attached to the table housing
Gear ring C raises and lowers inside the table housing to connect gear ring A and gear ring B together
after each cycle.

Please refer to drawing 2

Gear ring C is shown lowered to release the locked assembly

Gear ring A is now free to rotate with the table top
After the rotation is complete, Gear A is now in the new location

Gear ring C then raises to create a re-locked assembly as illustrated in drawing 1

Note: The raising and lowering of the gear rings is similar to a lapping effect.The accuracy of the gear teeth improves over time.

Milestone

Measuring Instrument

Finishing Measuring Instrument

Rotary Tables

CNC Indexing Tabler

Hydraulic Indexing Table

Manual Indexing Tables

APC with Worktable

NC Rotary Tables with Torque Motors

Accessories

Hydraulic Turrets

Technological Information