Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA3625-3F
Genuine AirTAC hydraulic shock absorber, order code ACA3625-3F from the ACA36 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA3625 (25 mm stroke)
- Speed range3: low speed, heavy load
- CapSteel cap (F)
- 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 ACA3625-3F
The ACA3625-3F combines the two heavy-duty choices of the ACA3625 ordering table: speed type 3 for the slowest, heaviest impacts and the F steel cap for a contact face that outlasts the plastic cap under repeated hard striking. Within a 25 mm stroke and a fully threaded M36x1.5 body, it absorbs 220 J per cycle and up to 135,000 J per hour at impact speeds up to 1 m/s, with effective masses as large as 3500 kg.
Self-compensation means the hydraulic resistance adapts to each impact automatically, while the one-piece body takes high pressure and sheds heat through its threads. The piston rod is hardened stainless steel for impact and corrosion resistance, the unit weighs 702 g, and it operates between -5 and +70 C with side loads of 3 degrees or less. A stop nut and a flange are listed accessories, and AirTAC advises stopping the load 1 mm before the rod bottoms out for long life.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA3625-3F Technical Specifications
| Order code | ACA3625-3F |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA3625 (25 mm stroke) |
| Speed range | 3: low speed, heavy load |
| Cap | Steel cap (F) |
| 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
Within the 25 mm stroke group, order the -3F when both conditions apply: your load arrives at low speed with great mass (type 3, up to 1 m/s and 3500 kg, versus 2400 kg for type 2 and 880 kg for type 1) and the cap takes a beating, since the F steel cap is specified for heavier impacts than the plastic cap of the plain ACA3625-3. If impacts are faster or lighter, look to ACA3625-2F or ACA3625-1. If each cycle approaches the 350 J level, step to the 50 mm stroke ACA3650, and use 20% to 80% of maximum energy as your sizing window either way.
Applications
Heavy truck and pallet stopping points
Slow-moving heavy vehicles and pallet loads match type 3 damping (up to 1 m/s, up to 3500 kg effective mass), and the steel cap endures the frequent blunt contact of repeated docking against the 220 J per cycle rating.
Descending platform and elevator snubbing
Loaded platforms lowered under gravity strike slowly but hard; the stop nut turns the 25 mm stroke into a positive stop, and the hardened stainless rod plus steel cap absorb the cycle within the 20% to 80% window of 220 J.
Heavy fixture clamping and locating
The M36x1.5 threaded body and optional flange mount the ACA3625-3F on machine frames where heavy fixtures seat at low speed, with self-compensating damping handling load variation and side loads kept within 3 degrees.
FAQ
What are the key figures for the ACA3625-3F?
ACA3625 model, 25 mm stroke, speed type 3 (up to 1 m/s impact speed, maximum effective mass 3500 kg), steel cap (F). Energy absorption is 220 J per cycle and 135,000 J per hour, body thread M36x1.5, weight 702 g, operating temperature -5 to +70 C, side load angle 3 degrees or less.
Why pick the steel cap version over the plain ACA3625-3?
The damping behaviour is identical, but the F option replaces the plastic cap with a steel cap, which the catalog specifies for heavier impacts. If your striker hits the cap hard every cycle, the steel cap gives the contact point a longer working life while the 3500 kg mass rating and 220 J per cycle absorption stay the same.