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Ball Screw
These compact and efficient solar tracking jacks are designed to precisely position loads at speeds up to 3.75 inches per minute.
| STB - Ball Screw Jacks | ||
|---|---|---|
| Part Number | Typical Dynamic Load Capacity* | Typical Staic Load Capacity* |
| STB-4.5 | 9,000 lb. | 20,000 lb. |
| STB-11 | 22,000 lb. | 40,000 lb. |
| STB-44 | 88,000 lb. | 88,000 lb. |
* Actual load capacities may vary depending on desired life and travel speed requirements.
Motor Control Options
Joyce/Dayton offers motor controls ranging from simple Motor Starters to complex positioning systems and Custom controls. Every system that is powered by an electric motor requires a control system. At Joyce, we know that choosing the best option can sometimes be a challenge. That’s why our Engineers are available to help you through the process.
Product Media
| Ball Screw Solar Tracking Jack (STB) Dimensions (in inches) | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model | A | B | C | D | E | F | G | H | J | K | L | M | N | P | Q | R | S | T | U |
| STB-4.5 | 12.750 | 5.500 | 15.5 | 1.0 | 1.75 | 0.75 | 1.250 | 2.50 | 4.9 | 2.06 | 0.625 | 0.188 Sq x 1.0 Lg | 3.75 | 6.0 | 1.250 | 5/16-18 | 5.00 | 1.25 | 1.50 |
| STB-11 | 12.750 | 5.750 | 19.5 | 1.5 | 2.75 | 1.25 | 1.500 | 3.00 | 5.1 | 2.06 | 0.625 | 0.188 Sq x 1.0 Lg | 3.75 | 6.5 | 1.750 | 5/16-18 | 5.00 | 1.75 | 2.00 |
| STB-44 | 20.000 | 9.500 | 27.5 | 2.5 | 4.50 | 1.78 | 2.375 | 4.50 | 8.0 | 3.13 | 1.000 | 0.250 Sq x 1.25 Lg | 5.00 | 13.0 | 2.750 | 3/8-16 | 8.00 | 3.00 | 4.00 |
- Aluminum housing
- Alloy screw
- Customer to provide trunnion pins. They should be made of steel with hardness greater than 30 HRC, yield strength greater than 110 KSI, and supported within 1/16 inch of the actuator housing.