Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2025-2N
Genuine AirTAC hydraulic shock absorber, order code ACA2025-2N from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2025 (25 mm stroke)
- Speed range2: medium speed, medium 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 ACA2025-2N
Ordering ACA2025-2N picks the N cap option: no cap, so the machine's own striker meets the hardened stainless steel piston rod directly. Stroke and damping stay at the 25 mm, speed type 2 level of the ACA range, absorbing up to 65 J per cycle and 54000 J per hour on effective masses up to 720 kg at up to 2 m/s.
Removing the cap trims the striking arrangement to the bare rod on the M20x1.5 fully threaded body, which suits compact layouts where a cap would add length or foul the striker. The self-compensating mechanism still matches resistance to each impact, and the stop nut or flange accessories can be added to set the positive stop 1 mm before the rod bottoms out. The operating range is -5 to +70 C with side load kept within 3 degrees.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2025-2N Technical Specifications
| Order code | ACA2025-2N |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2025 (25 mm stroke) |
| Speed range | 2: medium speed, medium 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 ACA2025-2N over the plastic-capped ACA2025-2 and the steel-capped ACA2025-2F when the surrounding machine provides the contact face and you want the shortest striking arrangement. Stroke length is the other lever: ACA2020-2N (60 J, 660 kg), ACA2030-2N (70 J, 780 kg) and ACA2040-2N (80 J, 890 kg) trade energy and mass capacity against space. Move to ACA2025-1N for impacts above 2 m/s or ACA2025-3N for slow, heavy loads under 1 m/s.
Applications
Compact robot axis stops
Inside tight robot or linear-module envelopes, the capless rod strikes directly where a capped body would not fit, damping medium-speed axes at up to 2 m/s.
Cart and rack stops
At warehouse cart stations and rack ends where the cart bumper plate meets the rod, the N version avoids a cap that could interfere with tight clearances.
Custom machine fixtures
Builders who make their own striker plates can bolt the bare rod into fixtures, using the M20x1.5 thread and the stop nut to set the stop point precisely.
FAQ
What are the main numbers for the ACA2025-2N?
25 mm stroke, no cap (N option); 65 J per cycle and 54000 J per hour absorption; effective mass up to 720 kg for speed type 2; impact speed up to 2 m/s; M20x1.5 body thread; 185 g weight; -5 to +70 C; side load 3 degrees or less.
What does the N suffix mean in practice?
N means the cap is omitted and the rod is struck directly, so the mating surface on your machine must present the impact squarely within the 3 degree side-load limit. For a protected face, order the plastic-capped ACA2025-2 or the steel-capped ACA2025-2F.