Ball Screw (STB)

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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.

2D/3D Drawings

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Product Media

jack

Solar Tracking Jack - Ball

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.