Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2025-1
Genuine AirTAC hydraulic shock absorber, order code ACA2025-1 from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2025 (25 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 ACA2025-1
The ACA2025-1 pairs AirTAC's 25 mm stroke ACA20 body with the type 1 speed range and a plastic cap. As a self-compensating hydraulic absorber it sets its own braking resistance against each impact, so no adjustment dial is needed. The -1 code in the ordering table means high speed, light load: it brakes hits up to 4 m/s and effective masses up to 260 kg, absorbing up to 65 J per cycle at rates to 54,000 J/h. The fully threaded M20x1.5 body screws straight into a tapped hole or the optional flange, and the whole unit weighs just 185 g.
The plastic cap on the rod end protects the tip between impacts and suits light-duty faces. The hardened stainless steel piston rod resists impact and corrosion, and the one-piece threaded body sheds heat well across -5 to +70 C. Set the stop nut so the load stops 1 mm before the rod bottoms out, and keep side load within 3 degrees.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2025-1 Technical Specifications
| Order code | ACA2025-1 |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2025 (25 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
Within the 25 mm family, pick ACA2025-1 when impacts are fast and light: up to 4 m/s and around 260 kg effective mass at most, with 65 J/cycle at 54,000 J/h. If the load is slower or heavier, the ACA2025-2 (up to 2 m/s, 720 kg) or ACA2025-3 (up to 1 m/s, 1040 kg) carry more mass at lower speed. Versus ACA2020-1 you gain 5 J per cycle and 5 mm of stroke; ACA2030-1 and ACA2040-1 go to 70 J and 80 J if more energy is needed. For the cap, ACA2025-1F adds a steel cap for heavier impacts and ACA2025-1N removes the cap entirely. AirTAC advises working at 20 to 80 percent of maximum energy.
Applications
Fast pick-and-place arms
Type 1 tuning brakes light gripper carriages moving at up to 4 m/s, with the self-compensating valve absorbing speed variation between cycles without retuning.
Light product stops on conveyors
The 25 mm stroke and 65 J/cycle rating stop light cartons or diverts at the end of a fast conveyor line, and the plastic cap cushions repeated light faces.
Small sliding fixtures
At 185 g with an M20x1.5 threaded body, the absorber screws into compact light-load slides; the stop nut turns the last of the stroke into a positive stop.
FAQ
What are the key figures of the ACA2025-1?
25 mm stroke, 65 J per cycle maximum energy, 54,000 J/h absorption rate, M20x1.5 body thread, 185 g weight. Type 1 speed range: impact speeds up to 4 m/s and effective mass up to 260 kg (types 2 and 3 on the same body allow 720 kg and 1040 kg). Operating temperature -5 to +70 C, side load 3 degrees or less.
When should I choose the plastic cap instead of the F or N versions?
The plastic cap on the ACA2025-1 suits light, frequent impacts and protects the rod end face. If your impacts are heavier, the ACA2025-1F steel cap stands up better; if the rod must meet the load directly, use the capless ACA2025-1N. If the load bounces at the start of the stroke, move to a faster type; at the end of the stroke, a slower one.