Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2040-1
Genuine AirTAC hydraulic shock absorber, order code ACA2040-1 from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2040 (40 mm stroke)
- Speed range1: high speed, light load
- CapPlastic cap
- 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 ACA2040-1
The AirTAC ACA2040-1 is the 40 mm stroke, speed type 1 build of the self-compensating ACA20 hydraulic shock absorber, fitted with a plastic cap. At this stroke it absorbs up to 80 J per cycle and 65000 J/h, and type 1 tuning handles fast, light impacts at up to 4 m/s with masses up to 320 kg. The fully threaded M20x1.5 one-piece body makes mounting and position adjustment simple and sheds heat well.
Because it is self-compensating, the resistance adjusts itself to each impact instead of needing preset orifices. The hardened stainless steel piston rod resists impact and corrosion, the unit works from -5 to +70 C, and side load must stay within 3 degrees. AirTAC recommends using 20 to 80 percent of the maximum energy, and a stop nut lets the stroke end act as a positive stop 1 mm before the rod bottoms out.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2040-1 Technical Specifications
| Order code | ACA2040-1 |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2040 (40 mm stroke) |
| Speed range | 1: high speed, light load |
| Cap | Plastic cap |
| 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
Within the ACA20 family this is the longest stroke option, ahead of ACA2020 (20 mm), ACA2025 (25 mm) and ACA2030 (30 mm), so it gives the most energy per cycle, 80 J, and the longest deceleration distance. Pick type 1 over the ACA2040-2 (up to 2 m/s) or ACA2040-3 (up to 1 m/s) when your load arrives fast and light; the plastic cap is the standard strike face, while ACA2040-1F adds a steel cap for heavier impacts and ACA2040-1N has no cap at all.
Applications
High-speed conveyor stops
Decelerates fast-moving cartons or carriers at up to 4 m/s on transfer lines, with the 40 mm stroke and 80 J per cycle covering light loads that a slower type 2 unit would see bounce back.
Pick-and-place arm damping
Absorbs the end-of-travel energy of light robotic or pneumatic slides; the self-compensating design keeps braking smooth as cycle rates and payload vary between moves.
Fast sliding gate cushioning
Takes the snap out of rapidly sliding covers and gates, with the M20x1.5 threaded body and stop nut allowing precise setting of the stop position on the machine frame.
FAQ
What are the key figures of the ACA2040-1?
Stroke 40 mm, speed type 1 rated up to 4 m/s, maximum energy 80 J per cycle and 65000 J/h, maximum mass 320 kg in type 1 service, body thread M20x1.5, weight 225 g, operating temperature -5 to +70 C, side load angle 3 degrees or less, plastic cap, hardened stainless steel piston rod.
Why type 1 and the plastic cap for this code?
Type 1 is tuned for high speed with light loads; if the load bounces at the start of the stroke the speed is suitable, if it bounces at the end move to a slower type such as ACA2040-2. The plastic cap is the standard strike face; order ACA2040-1F when the impact is heavier and a steel cap is wanted, or ACA2040-1N when the machine supplies its own striking surface.