ST Series Variants
The STH is an excellent fit for mid-range index table applications that require high accuracy, flexible mounting and a large hollow shaft. This product sets the standard for rotary positioning performance of large inertia loads at an exceptional value. The STH comes with backlash as low as 2 arc-min and indexing accuracy down to +- 60 arc-sec. With a large cross roller bearing, the STH can achieve a max tilting moment load capacity of 200Nm and a maximum radial load of 5000N—a perfect match for mid-size steel or aluminum tables as well as end of arm tooling.
The STR series is our ultra-high precision solution that features programmable output motions with low-wear rolling contact. Larger inertia load transmission is achieved with internal cam ratio reduction while maintaining powerful torque with less motor horsepower. The STR’s unique no-backlash preloaded mechanism improves the overall dynamics to force output motions to a new level of rigidity and accurate servo controller performance. The compact design reduces footprint while offering high speed rotation with large bending moment capacity.
ST Series, Summary Level Table
| Series | Max Torque Range | Backlash Rating | Reduction Ratios | |
|---|---|---|---|---|
| STH Hollow Output Rotary Indexer, Mid range accuracy and load handling |
 |
126Nm-170Nm | < 2 arc-min – < 4 arc-min | Range: 12:1-400:1 Variety: 14 |
| STR Hollow Output Rotary Indexer, High accuracy and load handling |
 |
58Nm-6072Nm | 0 arc-min | Range: 15:1-2000:1 Variety: 24 |