Replacement rotary actuators for Helac and HKS — HN series, built for Indian jobsites.
Helical-spline hydraulic rotary actuators in the exact L10 / L20 / L30 torque ladder — HN10, HN20, HN30 series, with integrated two-way balance valve as standard. Search your OEM part number. No match? We build to your sample.
Why buyers switch to us
Importing a single OEM actuator into India means 6–10 week lead times and landed costs inflated by freight and duties. We removed both.
All replacement units carry our serial plate and 12-month warranty. Every quotation states torque, holding torque and mounting dims measured against the OEM unit — ask for the verification sheet before you order. "Helac", "HKS", "Parker" and other brand names are trademarks of their respective owners; HN/DL-series parts are compatible replacements, not original parts.
Aftermarket replacements & OEM custom builds
Weihai Baishili Hardware Co., Ltd — two doors: standard interchange units keep your machine running; custom-engineered units give your new machine a better actuator.
01 — Aftermarket replacement
Drop-in equivalents of Helac L10 / L20 / L30 and HKS DA-H series (HN10 / HN20 / HN30, also coded DL-1 / DL-2 / DL-3), for drilling jumbos, excavator attachments, aerial platforms, material handling and marine deck equipment.
- Same torque ladder as the OEM: 180 – 43,000 Nm @ 210 bar
- Drop-in envelopes: flange / foot, BSPP + SAE ports
- Two-way balance valve option (steel or aluminium body)
- Units ex-stock Bengaluru · 3–7 day dispatch · 1 pc MOQ
02 — OEM custom solutions
New product development for machine builders: seven standard frame sizes (HN10 – HN70) cover 180 Nm to 43,000 Nm, plus build-to-sample for any other brand or legacy unit.
- Angles 90° – 360° standard, multi-turn custom to 1,500°
- Five output modes: single / double flange, spline, hollow shaft
- Five mountings: foot, saddle, front / rear flange, rail
- Low-temp seal packages, integrated counterbalance valves
The HN range — same ladder as Helac, plus attachment specials
Max nominal drive torque @ 210 bar. Every series is available with or without two-way balance valve.
| Series | Matches | Torque range | Holding torque | Typical use |
|---|---|---|---|---|
| HN10 | Helac L10 / IC10 / DL-1 | 180 – 2,700 Nm | 630 – 9,400 Nm | Compact positioning, valves, robotics |
| HN20 | Helac L20 / DL-2 | 500 – 4,200 Nm | 1,300 – 10,500 Nm | AWP boom rotation, utility trucks |
| HN30 | Helac L30 / IC30 / DL-3 | 1,900 – 43,000 Nm | 4,900 – 110,000 Nm | Drilling jumbos, mining, marine |
| HN40 | DL-4 · Helac T-type | 2,800 – 6,700 Nm | 6,100 – 14,300 Nm | Spline-output continuous duty |
| HN50 | DL-5 · PowerTilt-type | 900 – 18,000 Nm | 2,400 – 37,300 Nm | Excavator tilt hitches, 1–25 t |
| HN60 | DL-6 | 4,000 – 9,000 Nm | — | High bending-moment flanged duty |
| HN70 | DL-7 | 500 – 20,000 Nm | — | Valve control, custom angles |
HKS DA-H sizes with overlapping torque are covered by the nearest HN size; the rest are built to sample. Moveco ARR/ARP and other helical units: send the nameplate, we cross-reference within 24 h.
Where these actuators run
Field-proven references from the factory's application book — see the full applications & machine-brand map.
| Application | Reference build | Machines served |
|---|---|---|
| Drilling jumbo boom swing | HN30-73-180 | Face-drilling rigs (Boomer-type), bench drills |
| Wet shotcrete nozzle manipulator | HN30-19-360 | Tunnel shotcrete trolleys |
| AWP / overhead working vehicle boom | HN20-9-160 | Boom lifts, insulated utility trucks |
| Excavator tilt hitch / attachment rotation | HN50 series | 1–25 t excavators, tiltrotators, grabs |
| Mine coal machine & material handling | HN30-73-180 | Underground loaders, transfer arms |
| Solar tracking / valve control / radar | HN10 / HN70 | PV trackers, ball & butterfly valves, antennas |
One site in Weihai — machining to dispatch
Machining, gear grinding, assembly, painting and 100% pressure & function testing under one roof — no trading, no outsourcing of core processes. Zoned warehouses hold L10 / L20 / L30-ladder replacements as stock. Every unit is serialized and ships with its test record.
The factory, running
Phone clips from the shop floor in Weihai — CNC machining, a batch of helical spline shafts, machined housings and finished units in the stock warehouse.
Buying a replacement actuator — common questions
Are HN-series actuators a drop-in replacement for Helac L10, L20 and L30?
Yes. HN10, HN20 and HN30 follow the same torque ladder as Helac L10, L20 and L30 — 180 to 43,000 Nm at 210 bar — in drop-in envelopes: flange or foot mounting, BSPP and SAE ports. Every quotation states torque, holding torque and mounting dimensions measured against the OEM unit; ask for the verification sheet before you order.
How do I find the HN replacement for my part number?
Type the number from the nameplate into the search box at the top of this page, or open the interchange table. Partial numbers, no-dash formats, IC-Fluid and DL codes all work. No match? Send a nameplate photo, the old unit or a drawing and we build to your sample.
How quickly can I get a replacement actuator in India?
Replacement units are held as stock ex-Bengaluru and dispatched pan-India in 3–7 days, from a single piece; a sample from stock takes 7 days. Custom and built-to-sample units take 15–20 days door to door for the sample and 30–40 days for a production batch.
How much can I save against an imported OEM actuator?
50% or more against the OEM landed cost. Importing a single OEM actuator into India means 6–10 week lead times and a landed cost inflated by freight and duties; HN units ship from stock in Bengaluru.
Are these original Helac or HKS parts?
No. HN and DL-series actuators are compatible replacements made by Weihai Baishili Hardware Co., Ltd — not original parts. “Helac”, “HKS”, “Parker” and other brand names are trademarks of their respective owners and are used only to describe compatibility.
What warranty and test records come with each unit?
Every replacement unit carries our serial plate and a 12-month warranty. Each unit is pressure- and function-tested before dispatch and ships with its test record.
What is a helical hydraulic rotary actuator?
A sealed hydraulic unit that turns pressure into limited-angle rotation at high torque. A piston travels along the bore, and helical splines between the housing, the piston and the output shaft turn that travel into rotation — holding position without an external brake. The rotary actuator guide explains the mechanism and how to size one.