Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-3F
Genuine AirTAC hydraulic shock absorber, order code ACA2020-3F 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
- CapSteel cap (F)
- 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 ACA2020-3F
The ACA2020-3F pairs the compact 20 mm stroke of the AirTAC ACA series with an F suffix steel cap, the catalog option intended for heavier impacts than the standard plastic cap. It is a self-compensating hydraulic absorber of speed type 3, the setting for low-speed, heavy-load impacts up to 1 m/s, with a maximum effective mass of 960 kg. Energy capacity is 60 J per cycle and 50,000 J/h, delivered through a fully threaded M20x1.5 one-piece body that mounts by screwing directly into a tapped hole and dissipates heat well.
Inside, the piston rod is hardened stainless steel, chosen to resist impact and corrosion over long duty. The absorber operates from -5 to +70 C with side loads kept to 3 degrees or less. The steel cap takes the brunt of repeated strikes at the rod end, while an optional stop nut and flange complete the mounting picture.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-3F Technical Specifications
| Order code | ACA2020-3F |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2020 (20 mm stroke) |
| Speed range | 3: low speed, heavy load |
| Cap | Steel cap (F) |
| 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
Pick ACA2020-3F over the plastic-capped ACA2020-3 when the striking face sees punishing repeated contact and you want the steel cap barrier; over ACA2020-3N when a bare rod is not acceptable. It shares its 60 J, 20 mm stroke platform with all -1, -2 and -3 variants on this body, so keep type 3 only if your impact speed stays at or below 1 m/s. If the energy per cycle runs past 60 J, the longer ACA2025-3, ACA2030-3 or ACA2040-3 bodies give 65, 70 and 80 J respectively in the same F cap style.
Applications
Press cushioning
A slow descending press platen carrying a heavy tooling load suits type 3 damping, and the steel cap stands up to repeated hard contact that would soon mark a plastic cap.
Pallet stop on a transfer line
Heavy pallets coasting slowly into a fixed stop deliver high mass at low speed; the 60 J/cycle rating and 960 kg type 3 mass limit cover exactly this duty profile.
Robotic cell crash pad
Screwed into a fixture by its M20x1.5 thread, the ACA2020-3F absorbs a slow robot or gantry overtravel, with the stop nut providing a positive end stop 1 mm before bottom-out.
FAQ
What figures define the ACA2020-3F?
20 mm stroke, M20x1.5 body thread, steel cap (F option), speed type 3 with impacts up to 1 m/s and maximum mass 960 kg, 60 J/cycle and 50,000 J/h energy ratings, 175 g weight, -5 to +70 C operating temperature, side load within 3 degrees.
Can I convert the stroke end into a hard stop?
Yes. A stop nut is listed as an accessory and lets the stroke end act as a positive stop; AirTAC advises stopping the load 1 mm before the rod bottoms out and staying within 20 to 80 percent of the 60 J maximum energy per cycle.