Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-1
Genuine AirTAC hydraulic shock absorber, order code ACA2020-1 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
- CapPlastic cap
- 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 ACA2020-1
ACA2020-1 is the compact entry point of the AirTAC ACA20 range: a 20 mm stroke, self-compensating hydraulic absorber with an M20x1.5 fully threaded body. On speed type 1 it handles impact speeds up to 4 m/s and effective masses up to 240 kg, absorbing up to 60 J per cycle at a continuous 50,000 J/h. The damping force adjusts itself to each impact, so changing product weights do not call for re-setting.
At 175 g the unit is the lightest in the family, and the threaded body makes positioning, adjustment and heat dissipation straightforward. The hardened stainless steel piston rod stands up to repeated striking and corrosion, working from -5 to +70 C with side load kept at 3 degrees or less. This order code includes a plastic cap; order N for no cap or F for a steel cap. A stop nut and flange are listed accessories.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-1 Technical Specifications
| Order code | ACA2020-1 |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2020 (20 mm stroke) |
| Speed range | 1: high speed, light load |
| Cap | Plastic cap |
| 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 ACA2020-1 when 60 J per cycle and a 20 mm stroke are enough for the job and you want the smallest, lightest (175 g) body in the series. The next steps up are ACA2025-1 at 25 mm and 65 J, then ACA2030-1 at 30 mm and 70 J; move up when your energy per cycle or deceleration distance grows beyond what 20 mm can absorb. AirTAC recommends running between 20% and 80% of the rated energy, so size with that margin in mind.
Speed type 1 covers fast, light loads at up to 4 m/s; if your mass is heavier and slower, the -2 (up to 2 m/s) or -3 (up to 1 m/s) versions of the same ACA2020 body suit better. Bouncing at the start of the stroke points to a faster type, bouncing at the end to a slower one. For a rigid stop at the end of travel, use the stop nut to halt the load about 1 mm before the rod bottoms out.
Applications
Small pick-and-place units
Compact arms moving light parts at high speed stay within the 240 kg type 1 mass limit, and the short 20 mm stroke keeps cycle geometry tight at the end position.
Drawer and rack cushioning
Sliding drawers, racks and light trolleys up to 4 m/s are arrested by the self-compensating damping, and the 175 g body mounts in narrow M20x1.5 tapped holes.
Test fixture impact take-up
Where loads vary between cycles, self-adjusting resistance absorbs each impact without re-setting, and the stop nut can double the stroke end as a positive mechanical stop.
FAQ
Which figures define the ACA2020-1 in one view?
20 mm stroke, 60 J maximum energy per cycle, 50,000 J/h continuous capacity, maximum effective mass 240 kg for speed type 1 (impact up to 4 m/s), M20x1.5 body thread, weight 175 g, temperature range -5 to +70 C, side load 3 degrees or less, plastic cap fitted, with stop nut and flange available.
When should I step up from this model to a longer stroke?
When your energy per cycle approaches or exceeds 60 J, or you need more distance to slow the load gently, move to ACA2025-1 (25 mm, 65 J), ACA2030-1 (30 mm, 70 J) or ACA2040-1 (40 mm, 80 J), keeping usage between 20% and 80% of rated energy for long life.