Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2040-3F
Genuine AirTAC hydraulic shock absorber, order code ACA2040-3F from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2040 (40 mm stroke)
- Speed range3: low speed, heavy 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 ACA2040-3F
The ACA2040-3F takes the largest ACA body at 40 mm stroke and specifies the F suffix from the ordering code: a steel cap in place of the standard plastic one, giving the strike face the ruggedness needed for heavier impacts. Underneath, it is a self-compensating type 3 hydraulic absorber rated to 80 J per cycle and 65,000 J per hour, on a fully threaded M20x1.5 body weighing 225 g.
Speed type 3 targets slow, heavy masses: impact speeds up to 1 m/s and a maximum effective mass of 1280 kg. Since damping adjusts itself to each blow, no manual tuning is required, but AirTAC still advises staying within 20% to 80% of rated energy and using the stop nut so the load stops about 1 mm before rod bottom-out. The hardened stainless steel piston rod and heat-shedding threaded body support long service life from -5 to +70 C.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2040-3F Technical Specifications
| Order code | ACA2040-3F |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2040 (40 mm stroke) |
| Speed range | 3: low speed, heavy 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
Choose the F version when the incoming part or machine face hits hard and a plastic cap would wear; if the application is gentler, the ACA2040-3 with plastic cap is the standard build, and ACA2040-3N deletes the cap entirely so the rod strikes directly. For faster impacts keep the same 40 mm body but change the speed type: ACA2040-2 for up to 2 m/s or ACA2040-1 for up to 4 m/s. Shorter type 3 alternatives on the same thread include ACA2030-3 and ACA2025-3.
Applications
Heavy dock or AGV stop
A steel-capped 40 mm absorber stands up to repeated strikes from slow-moving carts, trolleys or AGVs under 1 m/s, where the cap face takes continuous abuse.
Press and fixture cushioning
Type 3 damping soaks up to 80 J per cycle from slow-descending press heads or clamping fixtures up to 1280 kg effective mass, with the steel cap resisting denting.
Loaded conveyor gate stop
A heavily loaded conveyor gate or indexing stop creeping below 1 m/s is arrested smoothly; the M20x1.5 thread plus stop nut or flange accessory makes a rigid positive-stop mount.
FAQ
What does the F suffix add to the ACA2040-3F?
It specifies the steel cap for heavier impacts instead of the plastic cap of the plain ACA2040-3. All other ratings are unchanged: 40 mm stroke, 80 J per cycle, 65,000 J per hour, type 3 damping to 1 m/s and 1280 kg maximum mass, M20x1.5 thread, 225 g weight, -5 to +70 C operating range.
How should I mount and adjust it for long life?
Screw the fully threaded M20x1.5 body into the machine, optionally through the flange accessory, and set the stop nut so the load stops about 1 mm before the rod bottoms out. Keep the impact speed at or below 1 m/s, side load within 3 degrees, and run between 20% and 80% of the 80 J per cycle rating.