Helac Corporation expands newest line of helical, hydraulic rotary actuators -- T20 Series

Unique design combines one-piece through shaft and internal tapered roller bearings for applications where torque generation and higher frequency cycling are primary requirements

Helac Corporation, a manufacturer of helical, hydraulic rotary actuators used as component parts by OEMs worldwide, announced the expansion of the T20 Series product line. The T20 Series, an improved, high performance replacement solution for Helac’s HS Series rotary actuators, features a splined output shaft that is supported by internal tapered roller bearings. An ideal product for applications where torque generation or higher frequency cycling are primary requirements, the T20 Series can carry substantial radial, moment and axial loads without additional external bearings while, at the same time, facilitating smooth operation and low breakaway pressures. However, when loads are supported by external bearings, the T20 Series is still an optimum solution.

The T20 Series offers a unique combination of features not found in alternative rotary positioning devices:

• High torque output and load holding – One-piece, through shaft permits equal driving torque at both ends of the shaft; holding torque is more than 2.1 times the rated torque capacity
• Substantial load-carrying capacity – Internal tapered roller bearings support loads without additional external bearings
• Mounting flexibility – The central through shaft extends the full length of the housing and terminates in dual, external, straight spline drive shaft extensions; the housing incorporates blind, drilled and tapped feet
• Exceptional resilience to shock loads – Helac’s sliding spline operating technology distributes loads equally over all gear teeth
• Zero external and internal bypass leakage – Sealing occurs against smooth cylindrical surfaces, effectively eliminating all leakage while maintaining selected positions without drift
• Corrosion resistance – Exclusion seals minimize ingress of contaminants; greaseable spline adaptors can be provided to further enhance corrosion resistance
• Equal displacement – Equal speed and torque is generated in both rotational directions

The T20 Series is available in three sizes with torque output ranging from 25,000 to 60,000 in-lb at 3,000 psi (2,825 to 6,780 Nm at 210 bar). The T20-25 and T20-45 feature 220 degrees standard rotation. The T20-60 offers 200 degrees of standard rotation. Custom engineered designs can be provided to meet special OEM application requirements.

In addition to the T20 Series, Helac Corporation offers the L Series actuators designed with large integral, nylon-composition bearings and large diameter drilled and tapped shaft flanges for heavy load-carrying applications. All Helac actuators are manufactured using an innovative, sliding-spline operating technology that converts linear piston motion into powerful shaft rotation. Countless mobile, industrial, construction and mining machinery manufacturers around the world depend on Helac actuators to perform such operations as rotation, positioning, manipulation, steering and indexing.

About Helac Corporation

A leader in the fluid power industry for over 30 years, Helac Corporation manufactures a comprehensive line of hydraulic rotary actuators used as component parts by OEMs and after-market attachments for the construction equipment industry. Helac rotary actuators are best known for their tremendous torque output, compact dimensions, exceptional load bearing capability and rugged, reliable performance. Helac PowerTilt and PowerGrip, two specialty products, improve the productivity of backhoes and excavators. Over 1,000 worldwide customers in diverse markets depend on Helac rotary actuators to provide product quality, reliability, ease of use and durability.

T20 Series is patent protected by U.S. #5447095, Canada #2153961, Europe #0697526.