This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACED20X175S, 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.

The AirTAC ACPD Double Rod Compact Cylinder ACPD20X175S is a double acting, double rod DIN-standard tight/compact air cylinder with a Ø20mm bore and 175mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACED20X175S (ISO 21287 ACE), in the same bore, stroke and force class.
A double acting, double-rod compact cylinder built to the DIN-standard ACP pattern, the ACPD20X175S pushes a 20 mm bore through a 175 mm stroke with a piston rod leaving both covers. Because each side sees the rod-side area, output is equal both ways: 117.8 N at 0.5 MPa and 164.9 N at 0.7 MPa. The through-rod resists rotation and light side load, gives a symmetric mount, and the rear rod can carry a sensor flag. A fixed TPU bumper sits at each end and speed runs 30-500 mm/s at 0.15-1.0 MPa (22-145 psi).
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight slides and guarding. The -S code on this model means the magnet is fitted, so CMSE / DMSE reed or solid-state switches mount directly on the body. Note the 175 mm stroke exceeds the 100 mm standard maximum for bore 20, so it is made to order. This model is discontinued; the current direct is ACED20X175, and you should confirm the ISO 21287 mounting dimensions before swapping.
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD20X175S |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED20X175S |
| Bore size | Ø20 mm |
| Stroke | 175 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 ACED20X175S (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.
| 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).
| ACPD | DIN compact cylinder (double-rod, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×175 | 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).
The rear rod carries a switch flag while the front rod drives a 3 kg sample tray back and forth, with both strokes delivering the same 117.8 N at 0.5 MPa.
The symmetric through-rod mounts inside a shallow gantry where a full-length ISO 15552 body would not fit, pushing connector trays at 30-500 mm/s.
CMSE or DMSE switches on the fitted magnet report end positions as the rod applies about 70 N of working force to a dispensing nozzle holder.
Size both ways: a bore 16 ACPD gives 75.4 N at 0.5 MPa, while a bore 25 reaches 206.2 N, so pick the 20 mm when your load sits between roughly 40 and 70 N of working force. Remember a plain double-rod cylinder drifts when air is lost - add a rod lock or pilot check if the load must stay put. The 175 mm stroke is non-standard for this bore and built to order. FA/FB flange, LB foot and clevis brackets bolt to the same face, and the fitted -S magnet accepts CMSE / DMSE switches. For new projects order the ACED20X175, the current ISO 21287 successor.
Replacement checklist
As a double-rod cylinder the force is equal in both directions: 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. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, and the port is M5x0.8 with an M6x1.0 female rod thread.
Bore 20 has a maximum standard stroke of 100 mm, so 175 mm is a non-standard, built-to-order length. The ACPD family itself is discontinued; the current-production replacement is the ACED20X175, which matches the same bore, stroke and force class in the ISO 21287 short-body format. Confirm the ISO 21287 mounting dimensions before swapping, since the ACP follows the older DIN-standard pattern.
Send us the quantity and destination. We confirm price, stock and lead time on the ACED20X175S replacement — usually within 7-8 hours.