High-Thrust Linear Actuators

High-Thrust Linear Actuators offer clean, precise, linear positioning by means of a trapezoidal-thread spindles (for intermittent duty applications) and ballscrew spindles (for higher duty applications).  Linear speeds up to 590 inches per minute and strokes up to 20 inches are available standard, with axial load capacities up to 36,000 lb.  For higher load capacities, two actuators can be used in tandem to share the loads.

Applications requiring precise, controlled, linear motion with a high degree of safety are perfect for these drives.  Typical applications include sheet metal bending, hydraulic cylinder replacements, conveyor tensioning, and scissor-lift table drives.  Industries served include Material Handling, Automation and Automotive.

The actuators consist of a reduction gearbox (the in-line units utilize a two-stage planetary gearbox and the offset units utilize a three stage spur gearbox) and motor, driving either a trapezoidal-thread or ballscrew spindle.  The spindles can be directly driven or non-rotating, where the nut is driven instead (see Unit Styles below).  They are protected against contamination by bellows or protective tubes and are continuously lubricated with an automatic lubrication system.

These actuators also include safety devices to track the spindle travel position and any wear of the supporting nut. Additional safety can be realized with an internal safety nut in case of failure of the supporting nut. The actuators can be self-locking (the axial load will not back drive the gearbox and motor), which is critical for machines that must hold a load stationary even with a loss of power.

If you have an application, please fill out our Application Sheet for our engineers to review.

• Range Overview
• Available Styles

To see dimensions of the units, click on the "Unit Size" in left column.

Unit Size	Max Spindle Speed	Spindle Type	Spindle Size & Lead	Nominal Axial Force (lb.)
EH4	236 mm/sec	Trapezoidal	46 x 5 mm	11,200 lb.
		Ballscrew	up to 63 x 10 mm	13,500 lb.
EH8	177 mm/sec	Trapezoidal	80 x 10 mm	22,500 lb.
		Ballscrew	up to 80 x 20 mm	36,000 lb.

*Duty cycle is the time running for any given 10 minute timeframe.  Information is subject to change without notice.

Several unit styles are available, including in-line (drive motor is in-line with spindle) and offset (drive motor is offset from spindle):

Offset Non-Rotating Trapezoidal Spindle Design
Offset Rotating Trapezoidal Spindle Design
Offset Lifting Cylinder Design
Offset Rotating Ballscrew Spindle Design