Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2040-2F
Genuine AirTAC hydraulic shock absorber, order code ACA2040-2F from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2040 (40 mm stroke)
- Speed range2: medium speed, medium load
- CapSteel cap (F)
- 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 ACA2040-2F
The AirTAC ACA2040-2F pairs the largest stroke in the ACA20 series with the steel cap option. The F suffix in the ordering code stands for a steel cap, chosen where the strike face hits harder than a plastic cap is meant to take. Underneath, the absorber is the same proven hardware: a self-compensating hydraulic unit on a fully threaded M20x1.5 body, speed type 2 for medium speeds up to 2 m/s and medium loads up to 890 kg effective mass.
Performance is the family maximum: 80 J absorbed per cycle and 65,000 J per hour over the 40 mm stroke, at a unit weight of 225 g. The hardened stainless steel piston rod resists impact and corrosion, the one-piece threaded body takes high pressure and sheds heat, and operation spans -5 to +70 C with side loads within 3 degrees. Add the stop nut for a positive stop 1 mm before the rod bottoms out, or the flange for panel mounting.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2040-2F Technical Specifications
| Order code | ACA2040-2F |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2040 (40 mm stroke) |
| Speed range | 2: medium speed, medium load |
| Cap | Steel cap (F) |
| 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
The cap letter is what separates this code from its siblings: the plain ACA2040-2 carries a plastic cap, the ACA2040-2N has no cap at all, and this -2F is the version for heavier impacts. Keep the -2F when the impact point sees rough or repeated strikes that would mark a plastic face. Stroke-wise, step down to ACA2030, ACA2025 or ACA2020 only if 80 J per cycle and the 890 kg type 2 mass rating are more than the load needs. If your impact speed is above 2 m/s or a slow heavy press must be stopped below 1 m/s, the -1 or -3 speed types on the same body are the alternatives.
Applications
Heavy fixture clamping stops
Absorbs the overshoot of heavy jigs and fixtures on medium-speed transfer lines, with the steel cap standing up to repeated hard strikes at the stop position.
Vertical drop chutes
Decelerates parts dropping into chutes or magazines; self-compensation handles variable drop masses up to the 890 kg type 2 rating without adjustment.
Machine retrofit stop blocks
The M20x1.5 fully threaded body screws straight into existing tapped stop blocks, and the optional flange covers panel-mount retrofits on older machines.
FAQ
What are the key figures of the ACA2040-2F?
40 mm stroke, M20x1.5 fully threaded body, steel cap (F option in the ordering code), speed type 2 (medium, impact speeds up to 2 m/s), maximum energy 80 J per cycle and 65,000 J per hour, maximum effective mass 890 kg at the type 2 rating, weight 225 g, temperature -5 to +70 C, side load 3 degrees or less, hardened stainless steel piston rod.
Why pick the steel cap over the plastic cap version?
The F suffix specifies a steel cap, which the catalog positions for heavier impacts than the standard plastic cap handles. The hydraulic performance is identical to the ACA2040-2, so the choice is about strike-face durability; if your machine already provides its own hardened strike button, the uncapped ACA2040-2N is the other sibling to consider.