This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACE20X55S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACE20X55S in place of this model. The ACE replacement is a current-production ISO 21287 compact cylinder in the same bore, stroke and force class, with a matching short body and the same mounting-accessory family, so it fits the same envelope. Confirm mounting-interface dimensions against the ACE datasheet before ordering.
Airtac ACP Compact Cylinder ACP20X55S
The AirTAC Airtac ACP Compact Cylinder ACP20X55S is a double acting DIN-standard tight/compact air cylinder with a Ø20mm bore and 55mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACE20X55S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke55 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM6×1.0
- StatusDiscontinued → ACE20X55S
- 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 ACP Compact Cylinder ACP20X55S
The ACP20X55S is a double acting compact cylinder on the DIN-standard short body, with a 20 mm bore, 55 mm stroke and the optional -S magnet already fitted so CMSE or DMSE reed and solid-state switches can be mounted directly on the hard-anodized aluminium tube. Air drives the rod out and back through M5x0.8 ports, and fixed TPU bumpers sit at both ends. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa that rises to 219.9 N push and 164.9 N pull, with a theoretical maximum of 32 kgf at 1.0 MPa.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures, small guarding and slim gantries. Plan on roughly 94 N (about 9.5 kgf) of usable push at 0.5 MPa - around 60% of the rating - which lifts about 8 kg vertically with a 2:1 margin. Note that this model is discontinued: the current-production drop-in is ACE20X55, same bore, stroke and force class, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACP Compact Cylinder ACP20X55S Technical Specifications
| Model | Airtac ACP Compact Cylinder ACP20X55S |
|---|---|
| Series | ACP DIN compact cylinder (discontinued) |
| Replacement | ACE20X55S |
| Bore size | Ø20 mm |
| Stroke | 55 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed bumper (both ends) |
| Max standard stroke | Up to 100 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACE20X55S (ISO 21287) carries the same bore/stroke/force class; confirm mounting-interface dimensions against the ACE datasheet before installation. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | 165 N |
| Max (@1.0 MPa) | 32 kgf | |
The ACE20X55S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac ACP Compact Cylinder ACP20X55S
| ACP | DIN compact cylinder (double-acting, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×55 | Stroke length in mm. |
| S | Optional built-in magnet for sensor position sensing (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
Replacement mapping (swap P for E): ACP→ACE, ASP→ASE, ATP→ATE, ACPD→ACED, ACPJ→ACEJ. ACP-family: ACP (double acting), ASP / ATP (single acting push / pull), ACPD (double rod), ACPJ (adjustable stroke).
Where the Airtac ACP Compact Cylinder ACP20X55S Is Used
Small-parts press fit
Pressing dowel pins or bushings into aluminium housings on a bench fixture, where the 157.1 N push at 0.5 MPa suits light interference fits and the short body fits under a low clamp arm.
Position-checked sorting gate
Kicking small cosmetic or electronic parts off a conveyor lane, with CMSE or DMSE switches reading extend and retract thanks to the fitted -S magnet.
Lift-and-lower light tray
Raising a lightweight tray of about 8 kg or less between two levels of a lab or packaging station, sized with a 2:1 vertical margin on the 20 mm bore.
Replacing the Airtac ACP Compact Cylinder ACP20X55S with the ACE20X55S
For a 55 mm stroke in this force band, the 20 mm bore gives 157.1 N push at 0.5 MPa; drop to the 16 mm bore (100.5 N) for lighter tooling or step up to the 25 mm bore (245.4 N) if the load grows. The 55 mm stroke sits well inside the 100 mm maximum standard stroke for this bore, so no made-to-order length is needed. This unit carries the -S magnet for CMSE / DMSE switches; FA/FB flange, LB foot and CA/CB clevis brackets bolt to the same face. A plain cylinder drifts when air is lost, so add a rod lock or pilot check valve for a held load. Order ACE20X55 as the current replacement and verify ISO 21287 mounting dimensions.
Replacement checklist
- ✓ Current-production ACE → ACE20X55S
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACP Compact Cylinder ACP20X55S FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa, 219.9 N push and 164.9 N pull; theoretical maximum 32 kgf at 1.0 MPa. It is double acting, 20 mm bore with a 10 mm rod, 55 mm stroke, M5x0.8 ports, female M6x1.0 rod thread, operating pressure 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, with fixed TPU bumpers at both ends.
Order ACE20X55, the current-production ISO 21287 successor made by swapping the P for an E. It matches the same 20 mm bore, 55 mm stroke and force class, and the short body keeps the compact footprint. Because the ACP was built to a DIN standard, confirm the ISO 21287 mounting dimensions against your fixture before swapping, and check FA/FB, LB or CA/CB bracket fit at the same time.
Request a Quote for the ACE20X55S
Send us the quantity and destination. We confirm price, stock and lead time on the ACE20X55S replacement — usually within 7-8 hours.