Joyce/Dayton provides 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.

Boots and special finishes are available for Joyce Ball Screw Jacks. Choose from a variety of boot materials and designs for the jacks you select (translating or KFTN). Joyce offers premium finishes, outdoor paint process, and custom finishes to meet your specifications. We have a hassle-free process for delivering what you need.

What you need to know to specify Motorized Ball Screw ComDRIVE jacks in industrial application.

Travel speeds and load capacities of standard ComDRIVE jacks are listed in the catalog. Here are a few tips.

1. Select the best option from the chart based on your load and speed.
2. Remember the charted load is based on a single ComDRIVE. If you pair a ComDRIVE with a jack, choose a motor that can lift the total system load.
3. High-lead ComDrives can achieve faster travel speeds than their standard-lead counterparts. High-lead part numbers begin with "H" (HWB62, HWB245, etc.).
4. Standard ComDRIVES use 1750 RPM, 3 phase, 60 HZ motors but we can supply whatever you need.
5. Brake motors are needed to hold position.
6. When you buy a ComDRIVE with a companipon jack, Joyce will deliver a matched jack(s) with the same closed height.
7. Larger capacity ComDRIVES are available upon request. Let us know what you need.

Ball Screw Jacks are rated based on their static thrust capacity from 1-ton  to 50-tons. But the selection of the best jack for the application requires further consideration.

1. When jacks are loaded in compression one must consider the load carrying capacity of the lifting screw (column load). How high do you need to lift the load? Choose a jack whose lifting screw is stout enough to handle the load at full rise.
2. Consider the travel speed of the DYNAMIC load. The speed at which the load will be moved is a limiting factor. How fast do you need to move the load? Sometimes high lead ball screw jacks or bevel ball actuators are a better choice in a given application.
3. How frequently will the jack need to move the load? Ball screw jacks are much more efficient than machine screw jacks, so heat is less of a factor in their operation, yet cycles for ball screw jacks must include some periods of rest.
4. You can choose a ball screw jack that meets specific life requirements. A calculated ball nut life (in inches) can be established for ball screw jacks based on the load, and duty cycle. Use the JAX® Online software to determine this.

 Once loads, duty cycles, and travel speeds are established, designers must select which jack design to use.

• Translating Design Jacks are most often selected. With this design, a driven input worm acts on an internal worm gear causing the lifting screw to extend or retract. Operation requires that rotation of the lifting screw be prevented. This rotation it restrained whenever two or more jacks are tied to the same load.
• Ball screw jacks cannot be keyed for non-rotation the same way that machine screw jacks are keyed. Contact Joyce for a design solution if you need a keyed ball screw jack.
• Keyed for Traveling Nut Design (KFTN) jacks are another option. These jacks have a fixed length lifting screw that rotates. Loads are attached to a flanged “traveling” ball nut that translates up and down the length of the rotating screw. This type of jack is ideal for applications that cannot accommodate a screw protection tube or that require a flush mount

Special features inherent in wormgear ball screw jacks.

Ball screw jacks include  ball nuts that are about 90% efficient so the jacks require much less energy to lift an equal load than their machine screw jack counterpart. They are NOT self-locking so a brake motor needs to be included in the drive system and hand wheels are not a recommended option.

Take the work out of using screw jacks in systems

Tell us what you need or use our exclusive JAX® Online software (it’s free). We will put together complete systems with single or multiple screw jacks for you. The software is great because it calculates motor horsepower and shaft diameters and torques. There are several common arrangements, but the program is flexible and allows you to design what you need.. 

Where are worm gear ball screw jacks used?

Motorized worm gear ball screw jacks are fast and efficient. They can accurately position and hold loads up to 50-tons. Examples include: Platform lifts, Damper adjustments, Ergonomic lifts, Maintenance lifts, Roll adjustments, Earth Station Antennas, Solar Trackers, Conveyor adjustments, Packaging equipment, and Gate adjustments.