Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA3625-2
Genuine AirTAC hydraulic shock absorber, order code ACA3625-2 from the ACA36 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA3625 (25 mm stroke)
- Speed range2: medium speed, medium load
- CapPlastic cap
- TypeSelf-compensating, speed type 1/2/3
- Body threadM36×1.5
- ACA362525 mm · 220 J/cycle · 135,000 J/h · max. mass 880 / 2400 / 3500 kg (type 1/2/3) · 702 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 ACA3625-2
Speed type 2 makes the -2 suffix the medium-speed member of the 25 mm stroke ACA3625 family: it decelerates loads arriving at up to 2 m/s with an effective mass up to 2400 kg, while still absorbing 220 J per cycle at up to 135,000 J per hour. Like every ACA36 unit it self-compensates, so resistance adjusts to each impact without manual tuning, inside a one-piece M36x1.5 threaded body with a hardened stainless steel piston rod.
The plastic cap keeps weight at 702 g, and the threaded mount allows quick installation and good heat shedding. Operating range is -5 to +70 C with side loads held to 3 degrees or less. AirTAC advises running between 20% and 80% of the 220 J energy ceiling, and using the stop nut to halt the load 1 mm before the rod bottoms out.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA3625-2 Technical Specifications
| Order code | ACA3625-2 |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA3625 (25 mm stroke) |
| Speed range | 2: medium speed, medium load |
| Cap | Plastic cap |
| Type | Self-compensating, speed type 1/2/3 |
|---|---|
| Body thread | M36×1.5 |
| ACA3625 | 25 mm · 220 J/cycle · 135,000 J/h · max. mass 880 / 2400 / 3500 kg (type 1/2/3) · 702 g |
| ACA3650 | 50 mm · 350 J/cycle · 150,000 J/h · max. mass 1400 / 2500 / 5600 kg (type 1/2/3) · 889 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 ACA3625-2 when the impact is too slow for type 1 but not a heavy low-speed hit: up to 2 m/s with masses up to 2400 kg. ACA3625-1 handles faster, lighter loads (up to 4 m/s, 880 kg), while ACA3625-3 covers slow, heavy impacts (up to 1 m/s, 3500 kg). If bounce appears at the start of the stroke, move to a lower number; at the end, go slower. For heavier blows on the cap, the F option adds a steel cap, and the 50 mm stroke ACA3650 raises capacity to 350 J per cycle.
Applications
Medium-speed machine stop
Cushions pneumatic cylinders and slides driving loads up to 2400 kg at up to 2 m/s, such as lifting columns and indexing tables.
Carton and transfer car handling
Decelerates gravity rollers and transfer cars where loads arrive between 1 and 2 m/s and need a self-compensating stop with no setting changes.
Gantry axis end damping
Protects end of travel on medium-speed robotic and gantry axes, with the optional flange simplifying mounting on the M36x1.5 body.
FAQ
What are the key figures for the ACA3625-2?
Stroke 25 mm, body thread M36x1.5, speed type 2 rated to 2 m/s, 220 J per cycle, 135,000 J per hour, maximum effective mass 2400 kg, weight 702 g, operating temperature -5 to +70 C, side load 3 degrees or less, plastic cap.
How does type 2 differ from type 1 and type 3?
The suffix sets the speed window: -1 works to 4 m/s with up to 880 kg, -2 to 2 m/s with up to 2400 kg, and -3 to 1 m/s with up to 3500 kg. Energy per cycle stays at 220 J across the 25 mm stroke models. Match the type to your impact speed and mass, and if the load bounces, shift one type in the direction of the bounce.