Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA3625-3
Genuine AirTAC hydraulic shock absorber, order code ACA3625-3 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
- 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 ACA3625-3
Choose the ACA3625-3 when heavy loads arrive slowly. This 25 mm stroke member of the AirTAC ACA36 series runs speed type 3, the low-speed, heavy-load setting: impact velocities up to 1 m/s with effective masses up to 3500 kg, the highest mass rating in the ACA3625 family. It still absorbs 220 J per cycle and up to 135,000 J per hour in the same fully threaded M36x1.5 one-piece body.
The suffix carries no F, so this version ships with the plastic cap rather than the steel cap of the -3F variant, matching lighter contact duty. The hardened stainless steel piston rod handles the impact and resists corrosion, the threaded body makes mounting and stroke adjustment straightforward while shedding heat, and operation spans -5 to +70 C. Weighing 702 g, it accepts side loads of 3 degrees or less, with a stop nut and flange offered as accessories.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA3625-3 Technical Specifications
| Order code | ACA3625-3 |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA3625 (25 mm stroke) |
| Speed range | 3: low speed, heavy 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
This is the slow-and-heavy choice of the 25 mm ACA3625 line: type 3 handles up to 1 m/s and 3500 kg, versus 2 m/s and 2400 kg for type 2 and 4 m/s and 880 kg for type 1. It fits loads that creep or descend under gravity into the stop. If your impact is faster and lighter, the ACA3625-2 or ACA3625-1 is the better match; if you need a tougher contact face, order the same unit as ACA3625-3F with the steel cap. Where the energy per cycle climbs toward 350 J, the 50 mm stroke ACA3650 is the next step up.
Applications
Vertical storage lift cushioning
Gravity-descending trays and lift platforms hit the stop slowly but with great mass, exactly the profile type 3 is set for: up to 1 m/s impact speed and up to 3500 kg effective mass against the 220 J per cycle rating.
Heavy pallet accumulator stops
A stop nut converts the 25 mm stroke end into a positive stop, and the low-speed type 3 damping absorbs slow-rolling pallet trains, provided each cycle stays within 20% to 80% of the 220 J maximum AirTAC recommends.
Press and counterweight snubbing
Counterweighted doors and tooling slides running at low velocity load the ACA3625-3 heavily per impact; the threaded M36x1.5 body plus optional flange anchor it to the frame, with side loads held within 3 degrees.
FAQ
What figures define the ACA3625-3?
ACA3625 model, 25 mm stroke, speed type 3 (low speed, heavy load, up to 1 m/s), plastic cap. Maximum energy absorption 220 J per cycle and 135,000 J per hour, maximum effective mass 3500 kg, body thread M36x1.5, weight 702 g, temperature -5 to +70 C, side load 3 degrees or less.
Can I tune the ACA3625-3 if my load behaves differently than expected?
The absorber is self-compensating, so resistance follows each impact without manual setting. For behaviour issues, the catalog guidance is to change speed type: bounce at the start of the stroke means a faster type such as ACA3625-2, bounce at the end means a slower type. The stop nut also lets you stop the load 1 mm before the rod bottoms out for a longer life.