Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2025-3N
Genuine AirTAC hydraulic shock absorber, order code ACA2025-3N from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2025 (25 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 ACA2025-3N
The N suffix on ACA2025-3N means no cap: the hardened stainless steel piston rod meets the striking surface directly, which is useful where a cap would obstruct the layout or the load already carries its own striking pad. Beneath that bare rod end sits the 25 mm stroke, type 3 absorber rated for low-speed heavy loads up to 1040 kg at impact speeds of 1 m/s or less, with 65 J per cycle and 54,000 J/h capacity.
Like every ACA20 model, the M20x1.5 fully threaded body screws into position for easy mounting and adjustment and sheds heat well. Resistance self-compensates to each impact, so varying loads need no re-setting. The unit weighs 185 g without a cap, operates from -5 to +70 C and accepts side load of 3 degrees or less; the stop nut accessory still lets the stroke end serve as a positive stop 1 mm before bottom-out.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2025-3N Technical Specifications
| Order code | ACA2025-3N |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2025 (25 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
Select ACA2025-3N over its siblings when the striking surface must reach the rod itself: ACA2025-3 carries a plastic cap and ACA2025-3F a steel cap, and either could add height or interfere with your fixture. The N option suits controlled, clean impacts since there is no cap face to strike. Speed-wise it remains type 3, so keep impact below 1 m/s; for faster loads move to ACA2025-2 (up to 2 m/s) or ACA2025-1 (up to 4 m/s). If 65 J per cycle at 25 mm stroke exceeds the job, the 20 mm ACA2020-3 is the shorter sibling.
Applications
Machine slide cushioning
End-of-travel damping for slow, heavily loaded machine slides where the striker plate must contact the rod directly, with no cap in the way.
Slow lift table arrest
Arrests heavy scissor-lift and lift-table descents arriving under 1 m/s, using type 3 mass ratings up to 1040 kg.
Test rig energy absorption
Absorbs controlled low-speed impacts on test rigs and fixtures, with the stop nut providing a repeatable stop point 1 mm before the rod bottoms out.
FAQ
What are the key figures of the ACA2025-3N?
The ACA2025-3N offers a 25 mm stroke and M20x1.5 threaded body with no cap, so the hardened stainless steel rod strikes directly. Type 3 ratings: impacts to 1 m/s, 65 J per cycle, 54,000 J/h, effective mass up to 1040 kg. Weight 185 g, operating range -5 to +70 C, side load within 3 degrees.
What changes by ordering N instead of F?
The final letter sets the cap: N omits it, F fits a steel cap for heavier impacts, and the unsuffixed ACA2025-3 uses a plastic cap. Absorption performance is identical across the three at 65 J per cycle; because there is no sacrificial cap, check that your striking face is suitable before choosing the N version.