This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACED20X55S, the same code under the new prefix. 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 ACPD Double Rod Compact Cylinder ACPD20X55S
The AirTAC ACPD Double Rod Compact Cylinder ACPD20X55S is a double acting, double rod 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 ACED20X55S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke55 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod
- Rod threadM6×1.0
- StatusDiscontinued → ACED20X55S
- 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 ACPD Double Rod Compact Cylinder ACPD20X55S
A double acting compact cylinder with a rod exiting both covers, the ACPD20X55S delivers 117.8 N in each direction at 0.5 MPa because both strokes work on the rod-side area. The 20 mm bore, 55 mm stroke and 10 mm through-rod suit tight jigs and guarding where a full-length ISO 15552 profile cylinder would need roughly twice the mounting length. This unit carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be clipped on for end-of-stroke sensing.
The hard-anodized aluminium body with an S45C hard-chrome rod runs on 0.15-1.0 MPa (22-145 psi) at 30-500 mm/s, with a fixed TPU bumper at each end and M5x08 ports - actually M5x0.8 - on both covers. Note that this model is discontinued: the current-production direct is the ISO 21287 ACED20X55, so confirm mounting dimensions before swapping.
Airtac ACPD Double Rod Compact Cylinder ACPD20X55S Technical Specifications
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD20X55S |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED20X55S |
| Bore size | Ø20 mm |
| Stroke | 55 mm |
| Acting type | Double acting, double rod |
| 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 ACED20X55S (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 | Force (both ways) |
|---|---|
| 0.5 MPa | 118 N |
| 0.7 MPa | 165 N |
| Max (@1.0 MPa) | 24 kgf |
Double-rod: a rod exits both covers, so output force is equal in both directions (rod-side area used).
Model Code: Airtac ACPD Double Rod Compact Cylinder ACPD20X55S
| ACPD | DIN compact cylinder (double-rod, 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 (double rod, adjustable stroke).
Where the Airtac ACPD Double Rod Compact Cylinder ACPD20X55S Is Used
Reciprocating test fixture
The symmetric through-rod drives a probe carriage on a PCB test rig, giving 117.8 N of press and return force from one air supply with no return spring to tune.
Gated inspection station
With the -S magnet fitted, CMSE or DMSE switches confirm both end positions of a small guard or gate interlock moving 55 mm, at cycle speeds up to 500 mm/s.
Compact ejection unit
About 70 N of usable force at 0.5 MPa ejects finished small plastic caps from a molding nest where the short ISO 21287 body is the only cylinder that fits.
Replacing the Airtac ACPD Double Rod Compact Cylinder ACPD20X55S with the ACED20X55S
At 117.8 N per side at 0.5 MPa, the 20 mm bore sits between the 16 mm (75.4 N) and 25 mm (206.2 N) sizes - step down for lighter pick-and-place arms, up if your tooling mass approaches the 6 kg vertical-lift figure. The through-rod resists rotation and side load, and the rear rod can carry a sensor flag. The 55 mm stroke is within the 100 mm standard range for this bore. Remember the piston drifts if air is lost, so add a rod lock or pilot check for held loads. Order the ACED20X55 as the current replacement and verify ISO 21287 footprint dimensions.
Replacement checklist
- ✓ Current-production ACE → ACED20X55S
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACPD Double Rod Compact Cylinder ACPD20X55S FAQ
Because a rod exits both covers, force is equal both ways: 117.8 N at 0.5 MPa and 164.9 N at 0.7 MPa, with a maximum of 24.0 kgf at 1.0 MPa. Both strokes use the rod-side area of the 20 mm bore, so there is no push-versus-pull difference. Operating range is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, temperature -20 to +70 C, with a fixed TPU bumper at each end and M5x0.8 ports.
The S in the code means the optional -S magnet is fitted, so CMSE reed or DMSE solid-state switches mount directly on the body for end-of-stroke signals. The ACPD family is discontinued; the current-production successor is the ACED20X55 in the ISO 21287 ACE series, which matches the same bore, stroke and force class - confirm the mounting dimensions against your fixture before ordering.
Related AirTAC ACE Cylinders
Request a Quote for the ACED20X55S
Send us the quantity and destination. We confirm price, stock and lead time on the ACED20X55S replacement — usually within 7-8 hours.