Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-1N
Genuine AirTAC hydraulic shock absorber, order code ACA2020-1N from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2020 (20 mm stroke)
- Speed range1: high speed, light 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 ACA2020-1N
Ordering ACA2020-1N deletes the cap entirely: the N suffix leaves the hardened stainless steel piston rod bare, so the moving load strikes the rod directly. Everything else stays at the 20 mm, type 1 specification: self-compensating damping for fast, light loads up to 4 m/s, 60 J per cycle, 50,000 J/h and a 240 kg effective mass ceiling at speed type 1.
The M20x1.5 fully threaded one-piece body keeps installation simple, takes high pressure and disperses heat well. Without a cap, align the striking surface squarely, since side load must stay within 3 degrees. The stop nut and flange accessories still fit, the unit works from -5 to +70 C, and the weight is a light 175 g.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-1N Technical Specifications
| Order code | ACA2020-1N |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2020 (20 mm stroke) |
| Speed range | 1: high speed, light 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
Choose ACA2020-1N when the machine already provides its own strike pad and a cap would only add stack height: the N code removes the cap and the rod is hit directly. Compared with ACA2020-1 (plastic cap) and ACA2020-1F (steel cap) the 20 mm type 1 figures do not change: 60 J per cycle at up to 4 m/s. Slow or heavy loads need ACA2020-3; more energy per cycle needs the 25 mm ACA2025-1.
Applications
Custom tooling with own pad
Machines that carry their own bumper or striker plate, where the bare hardened stainless rod of the N version contacts the customer's pad directly.
Space-tight installations
Slots where cap height would interfere with adjacent parts; removing the cap via the N code shortens the strike face on the M20x1.5 threaded body.
Test benches and rigs
Engineering rigs with a controlled, squarely aligned striker, where 60 J per cycle at up to 4 m/s and 50,000 J/h cover fast, light test cycles.
FAQ
What are the essential ACA2020-1N figures?
20 mm stroke, speed type 1 (up to 4 m/s, 240 kg max effective mass), 60 J per cycle, 50,000 J/h, M20x1.5 fully threaded body, no cap so the rod is struck directly, 175 g weight, -5 to +70 C, side load 3 degrees or less, hardened stainless steel piston rod, stop nut and flange accessories.
What changes with the N suffix, and what does not?
The N suffix removes the cap, so the load strikes the bare piston rod; keep the impact squarely aligned within the 3 degree side load limit. The damping specification is unchanged from the capped versions: self-compensating type 1 damping, 60 J per cycle at up to 4 m/s. AirTAC still advises using 20% to 80% of maximum energy and stopping the load 1 mm before the rod bottoms out.