This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACED12X50S, 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 ACPD12X50S is a double acting, double rod DIN-standard tight/compact air cylinder with a Ø12mm bore and 50mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACED12X50S (ISO 21287 ACE), in the same bore, stroke and force class.
A double acting, double-rod compact cylinder in the DIN-standard ACP family, the ACPD12X50S pushes a 6 mm rod out of BOTH covers, so thrust is identical in each direction: 42.4 N at 0.5 MPa and 59.4 N at 0.7 MPa. The through-rod resists rotation and light side load, and the rear rod can carry a sensor flag for tight machine layouts. Its short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it fits slim jigs and guarding where a full-length body will not.
This model carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be clipped on for end-of-stroke detection. Note that this cylinder is discontinued: the current-production direct is the ACED12X50 (swap the P for an E), and buyers should confirm the ISO 21287 mounting dimensions before swapping. A fixed TPU bumper at each end decelerates the piston; the cylinder does not hold position if air is lost, so use a rod lock or pilot check for a held load.
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD12X50S |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED12X50S |
| Bore size | Ø12 mm |
| Stroke | 50 mm |
| Acting type | Double acting, double rod |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| 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 50 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACED12X50S (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 | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 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). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 42.4 N double-direction thrust and 50 mm stroke suit pushing finished bushings or pins out of a drilling fixture, with the through-rod keeping the tool plate square.
With the -S magnet fitted, CMSE or DMSE switches confirm end positions on a slide or interlock gate where the short body must tuck behind guarding.
For a 12 mm bore job needing equal force both ways, this model delivers 42.4 N at 0.5 MPa in either direction. If the load is heavier, step up to the 16 mm bore (75.4 N at 0.5 MPa); if 42.4 N is generous, there is no smaller bore in the family, so consider the single-rod ACP or the adjustable ACPJ, both now replaced by ACE / ACED. The 50 mm stroke is the maximum standard stroke for this bore, so no made-to-order length is needed. FA/FB flange and LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches. Order the ACED12X50 as the current replacement and verify its ISO 21287 mounting dimensions first.
Replacement checklist
Yes. Because a rod exits both covers, both strokes use the rod-side area, so output is equal both ways: 42.4 N at 0.5 MPa and 59.4 N at 0.7 MPa, with a maximum of about 8.6 kgf at 1.0 MPa. Operating range 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.
The ACPD family is no longer in production. The current-production direct is the ACED12X50 (swap the P for an E), an ISO 21287 compact cylinder in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions against your fixture before swapping, since the ACP was built to the DIN standard.
Send us the quantity and destination. We confirm price, stock and lead time on the ACED12X50S replacement — usually within 7-8 hours.