This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACED12X25S, 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 ACPD12X25S is a double acting, double rod DIN-standard tight/compact air cylinder with a Ø12mm bore and 25mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACED12X25S (ISO 21287 ACE), in the same bore, stroke and force class.
A double acting, double-rod compact cylinder in the discontinued ACPD series, the ACPD12X25S pushes and pulls with the same 42.4 N at 0.5 MPa (59.4 N at 0.7 MPa) because a 6 mm rod exits both covers and both strokes work on the rod-side area. The through-rod resists rotation and light side load, gives a symmetric mount, and leaves the rear rod free to carry a sensor flag. A fixed TPU bumper sits at each end and speed runs 30-500 mm/s.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarding where a full-length body will not fit. The S in the code means the optional -S magnet is fitted, so CMSE or DMSE reed and solid-state switches can be clipped on for end-of-stroke signalling. This model is discontinued; the current-production direct is the ACED12X25 - confirm the ISO 21287 mounting dimensions before swapping, since the ACP series was built to a DIN-standard footprint.
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD12X25S |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED12X25S |
| Bore size | Ø12 mm |
| Stroke | 25 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 ACED12X25S (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. |
| ×25 | 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).
With the -S magnet fitted, CMSE or DMSE switches confirm the 25 mm part-present stroke on compact pick-and-place heads where a longer body cannot be mounted.
Equal 42.4 N force in both directions at 0.5 MPa suits a bench-top clamp that must eject a bushing and retract a pin with identical force from one 12 mm bore.
The second rod on the back cover carries a switch flag for cycle counting on a compact test fixture, keeping the front rod free for the workpiece.
For a 12 mm bore job needing equal force in both directions, this model delivers 42.4 N each way at 0.5 MPa; step up to the ACPD16X25S for 75.4 N or drop to the smallest size only if under 42 N suffices. The 25 mm stroke sits well inside the 50 mm maximum standard stroke for this bore, so no made-to-order length is needed. The female M3x0.5 rod thread and PT ports suit small tooling plates; add LB foot or FA/FB flange hardware to match the fixture. Remember that a plain double-rod cylinder drifts when air is lost - use a rod lock or pilot check if the load must be held. Order the ACED12X25 as the current replacement.
Replacement checklist
Yes - the double-rod design means both strokes use the rod-side area, so output is equal each way: 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 pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), and speed range 30-500 mm/s.
Order the ACED12X25, the current-production ISO 21287 successor: swap the P for an E and you get the same 12 mm bore, 25 mm stroke and force class in a short compact body. Because the ACP series followed a DIN-standard footprint, confirm the ISO 21287 mounting dimensions against your fixture before swapping. The ACED keeps the optional-magnet approach for CMSE / DMSE switches, so specify the equivalent -S code if you need position sensing.
Send us the quantity and destination. We confirm price, stock and lead time on the ACED12X25S replacement — usually within 7-8 hours.