Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-3N
Genuine AirTAC hydraulic shock absorber, order code ACA2020-3N from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2020 (20 mm stroke)
- Speed range3: low speed, heavy load
- CapNo cap (N)
- TypeSelf-compensating, speed type 1/2/3
- Body threadM20×1.5
- ACA202020 mm · 60 J/cycle · 50,000 J/h · max. mass 240 / 660 / 960 kg (type 1/2/3) · 175 g
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-3N
The ACA2020-3N is the N-option build of the AirTAC ACA 20 mm stroke absorber: no cap at all, so the hardened stainless steel piston rod meets the moving load directly. Damping is speed type 3, the self-compensating profile for slow, heavy impacts up to 1 m/s, with a maximum effective mass of 960 kg. Capacity is 60 J per cycle and 50,000 J/h in the fully threaded M20x1.5 one-piece body, which is simple to screw into place and cools efficiently during high-frequency duty.
Because there is no cap, ensure the striking surface is compatible with bare rod contact. The rod material is hardened stainless steel for impact and corrosion resistance. The series runs from -5 to +70 C with side loads of 3 degrees or less, and a stop nut or flange can be added as accessories to shape the mounting and the end stop.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-3N Technical Specifications
| Order code | ACA2020-3N |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2020 (20 mm stroke) |
| Speed range | 3: low speed, heavy load |
| Cap | No cap (N) |
| Type | Self-compensating, speed type 1/2/3 |
|---|---|
| Body thread | M20×1.5 |
| ACA2020 | 20 mm · 60 J/cycle · 50,000 J/h · max. mass 240 / 660 / 960 kg (type 1/2/3) · 175 g |
| ACA2025 | 25 mm · 65 J/cycle · 54,000 J/h · max. mass 260 / 720 / 1040 kg (type 1/2/3) · 185 g |
| ACA2030 | 30 mm · 70 J/cycle · 58,000 J/h · max. mass 280 / 780 / 1120 kg (type 1/2/3) · 210 g |
| ACA2040 | 40 mm · 80 J/cycle · 65,000 J/h · max. mass 320 / 890 / 1280 kg (type 1/2/3) · 225 g |
| Max impact speed | 4 m/s (type 1), 2 m/s (2), 1 m/s (3) |
| Temperature | -5 to +70 °C |
| Side load angle | 3° or less |
| Piston rod | Hardened stainless steel |
| Accessories | Stop nut, flange |
Source: AirTAC Products Catalog 2026A (PDF01-P0779..P0783), ACA/ACJ series specifications, ordering code and usage notes.
How to choose
Within the 20 mm family this N version is the counterpart to the plastic-capped ACA2020-3 and the steel-capped ACA2020-3F; choose it only where the load strikes the rod itself and no cap is wanted. Hold to type 3 if your impact speed is 1 m/s or below and the mass is on the heavy side; faster, lighter impacts belong to the -1 and -2 dash numbers. When energy demand exceeds the 60 J of this shortest body, the ACA2025-3, ACA2030-3 and ACA2040-3 siblings extend capacity to 65, 70 and 80 J per cycle.
Applications
Conveyor product backstop
Heavy totes creeping to a halt at a conveyor end fit type 3 damping; with no cap in the way, the hardened stainless rod contacts the carrier face directly for a compact stack-up.
Counterweight arrest
A slowly falling counterweight or lift table can be caught by the 60 J/cycle absorption within the 960 kg type 3 mass limit, with the stop nut set 1 mm before rod bottom-out.
Machine slide brake
Screwed through its M20x1.5 thread into a slide carriage, the bare-rod ACA2020-3N cushions slow heavy traverse motion where a protruding cap would foul the strike face.
FAQ
What are the key specifications of the ACA2020-3N?
No cap (N option), 20 mm stroke, M20x1.5 body thread, 60 J/cycle and 50,000 J/h, speed type 3 for impacts up to 1 m/s with maximum mass 960 kg, weight 175 g, temperature range -5 to +70 C, side load angle 3 degrees or less.
What does the N suffix change in practice?
The ordering code N means the absorber is supplied with no cap and the rod strikes the load directly, unlike the plastic cap of the plain ACA2020-3 or the steel cap of the ACA2020-3F. Energy, stroke and damping behavior are otherwise those of the 20 mm type 3 body.