Helical Hydraulic Rotary Actuators

POWERFUL • High torque • High bearing capacity Helac’s innovative Powered Hinge Helical, Hydraulic Rotary Actuators • Moving parts enclosed • Suitable for harsh environments COMPACT • High power density • Fits in tight spaces HOLDS POSITION • Zero internal leakage • Smooth operation • No external brake required SIMPLIFIES • Eliminates bearings, linkages & brackets • Reduces bill of materials • Simplifies supply chain, assembly and maintenance BACKDRIVES IN OVERLOAD CONDITIONS • Hydraulic fuse • Prevents mechanical damage For over 45 years, Helac has lead the way in actuator technology and innovation....

L10 SERIES Rotation: Maximum Drive Torque: Maximum Holding Torque: Maximum Straddle Moment: Maximum Cantilever Moment: Mounting: 180° and 360° 1,700 to 25,000 in-lb 5,600 to 83,000 in-lb 5,000 to 100,000 in-lb 5,000 to 100,000 in-lb Flange L20 SERIES Rotation: Maximum Drive Torque: Maximum Holding Torque: Maximum Straddle Moment: Maximum Cantilever Moment: Mounting: 180° 4,500 to 39,000 in-lb 11,800 to 93,200 in-lb 22,500 to 280,000 in-lb 12,000 to 140,000 in-lb Foot L30 SERIES Rotation: Maximum Drive Torque: Maximum Holding Torque: Maximum Straddle Moment: Maximum Cantilever Moment: Mounting:...

Helac actuators move, support and position . . .

Operating Technology Helac’s innovative, sliding-spline operation technology converts linear piston motion into powerful shaft rotation. Each actuator is comprised of a housing and two moving parts — the central shaft and piston. Helical spline teeth on the shaft engage matching teeth on the piston’s inside diameter. A second set of helical splines on the piston’s outside diameter mesh with the gear in the housing. STARTING POSITION The piston is completely bottomed out. Bars indicate starting positions of piston and shaft. The housing with integral gear remains stationary. ENDING POSITION When...

Customized Products Helac Corporation can customize our rotary actuators to meet unique application requirements. Custom engineering can range from slight to complete, and is offered to those customers whose actuator needs match our program requirements. Mounting Options Cantilever Mount The load is mounted to the shaft flange and is supported at only one end of the shaft. Cantilever mounting is not recommended for aerial work platforms or other critical and safety-related applications. Straddle Mount The load is supported at both ends of the shaft. Cantilever Mount The upper portion of the bracket...

Valve Configurations Optional factory mounted counterbalance valves prevent rotation in the event of a hydraulic line failure, control rotation when loads go over center, and protect the actuator against excessive torque loads. L10 with counterbalance valve Hydraulic Schematic of Optional Counterbalance Valve L20 with counterbalance valve L10, L20 AND T20 SERIES Manufactured from aluminum, the valve blocks are bolted to a flat mounting pad on the actuator housing. Three bolts secure the valve block to the actuator. See specification pages for valve location. The pilot ratio is 3:1. The valves...

Model Code Reference Guide L10 - 25 - E - RF - 180/90 - S1 - O - H 1 MODEL CODE DESCRIPTION ES/MS Custom Design FT Foot Mount FF Front Flange Standard design with internal stop tube to limit rotation - indicates final rotation. Mounting holes in shaft flange only. S1 Mounting holes S1 Mounting holes in shaft flange in shaft flange with through-hole only for tie rod (4.5, 8.2, and 15k models) S2 Mounting holes in shaft and end cap flanges Dual Spline Dual Adapter S2 Mounting holes in shaft and end cap flanges H Standard Seals and Bearings V Valve Ready S Special Seals and Bearings The Model Code...

Actuator Performance Torque Versus Hydraulic Pressure and Loads The driving torque and holding torque are approximately linear with hydraulic pressure. As moment loads increase, drive torque may be reduced by up to 15%. TORQUE VS. MOMENT TORQUE, % RATED TORQUE, % RATED SPECIFICATIONS REFERENCE GUIDE CANTILEVER MOUNT C Radial Load STRADDLE MOUNT C Radial Load B Cantilever Moment B Straddle Moment A Torque D Axial Load A Torque D Axial Load Digital Drawings can be provided in the following formats: .pdf, .stp, .dwg and .dxf. Email request to [email protected], or call +1 800 327 2589 (US and...

SHAFT FLANGE HOUSING FLANGE MOMENT CAPACITY (B), CANTILEVER MOUNT APPROXIMATE WEIGHT

D1 Shaft mounting surface diameter D3 Mounting flange inside diameter Mounting holes, shaft flange inch deep metric deep Number of mounting holes, shaft flange Bolt circle diameter, shaft flange Mounting holes, housing flange inch deep metric deep Number of mounting holes, housing flange Bolt circle diameter, housing flange Shaft through-hole diameter inch metric ISO-11926/SAE Series of ports. Sizes are 7/16. See drawings for details. ISO-1179-1/BSPP ‘G’ Series of ports. Sizes are 1/8. See drawings for details. Overall Length, non-rotating 180° 360° Shaft flange to counterbalance valve 180° in...

L20-4.5,8.2,15 SHAFT FLANGE L20-4.5,8.2,15 ENDCAP APPROXIMATE WEIGHT

Shaft and endcap flange diameter Housing diameter Mounting holes, shaft flange inch deep metric deep Number of mounting holes, shaft flange Bolt circle diameter, shaft flange inch deep metric deep Foot hole diameter Shaft center hole size inch deep metric deep Mounting holes, endcap flange (S2) inch deep metric deep Number of mounting holes, endcap flange (S2) Bolt circle diameter, endcap flange (S2) Overall height (excluding valve) Foot height Overall height (with valve) Overall length Overall length, non-rotating Shaft flange to counterbalance valve Mounting length Shaft flange to mounting...

APPROXIMATE WEIGHT * L30-380 Standard rotation is 210°. 180° rotation is achieved by incorporating an internal stop tube in the 210° actuator. Contact Helac Corporation for more information.