Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-2F
Genuine AirTAC hydraulic shock absorber, order code ACA2020-2F from the ACA20 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- ModelACA2020 (20 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 ACA2020-2F
The F at the end of this order code specifies a steel cap, the option the catalog lists for heavier impacts on the ACA20 self-compensating hydraulic shock absorber. The one-piece M20x1.5 threaded body takes high pressure, mounts and adjusts easily, and sheds heat well, so the 20 mm stroke keeps absorbing up to 60 J per cycle and 50,000 J per hour cycle after cycle. The hardened stainless steel piston rod resists both impact and corrosion.
This is a type 2 (medium speed) unit: it handles medium loads arriving at up to 2 m/s, with a maximum effective mass of 660 kg in that range. AirTAC recommends using 20% to 80% of the maximum energy, stopping the load 1 mm before the rod bottoms out via the stop nut, and keeping side load within 3 degrees. Temperature range is -5 to +70 C and the unit weighs 175 g.
Airtac ACA Standard Automatic Compensation Hydraulic Shock Absorber ACA2020-2F Technical Specifications
| Order code | ACA2020-2F |
|---|---|
| Product | Hydraulic Shock Absorber |
| Model | ACA2020 (20 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
Within the 20 mm stroke group, pick ACA2020-2F over the plastic-capped ACA2020-2 when the struck surface sees heavier impacts, and over ACA2020-2N when you want a cap rather than direct rod contact. The type 2 speed rating sits between ACA2020-1F (up to 4 m/s, light loads, 240 kg) and ACA2020-3F (up to 1 m/s, heavy loads, 960 kg); if the load bounces at the start of the stroke go one type faster, if it bounces at the end go slower. When the same medium-speed duty needs a longer energy window, step up to the 25, 30 or 40 mm strokes of ACA2025-2F, ACA2030-2F or ACA2040-2F for 65 to 80 J per cycle.
Applications
Heavy pallet positioning
Stop medium-speed pallets or fixtures on automated machinery, where the steel cap stands up to repeated heavier impacts within the 2 m/s type 2 speed range.
Material handling bumpers
Cushion trolleys and transfer carts of up to 660 kg effective mass in warehouses, with the M20x1.5 thread letting you screw the absorber directly into the frame.
Machine frame end stops
Use with the stop nut as a positive stop at the end of a sliding machine member, and add the optional flange accessory to simplify mounting and alignment.
FAQ
What does the F suffix change on the ACA2020-2F?
It specifies the steel cap instead of the standard plastic cap or the no-cap N version, the catalog option intended for heavier impacts. Everything else stays at the ACA2020 rating: 20 mm stroke, 60 J per cycle, 50,000 J per hour, type 2 speed to 2 m/s, 660 kg maximum effective mass, M20x1.5 body thread, -5 to +70 C and 175 g weight.
How do I mount and set it up?
Screw the M20x1.5 fully threaded body into the mounting hole, or use the flange accessory if the machine needs a bracket. Keep side load at 3 degrees or less, and set the stop nut so the load stops 1 mm before the rod bottoms out; running between 20% and 80% of the maximum energy gives the longest service life.