This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACE12X50, 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 ACP Compact Cylinder ACP12X50 is a double acting 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 ACE12X50 (ISO 21287 ACE), in the same bore, stroke and force class.
A double acting compact cylinder in the DIN-standard ACP series, the ACP12X50 pairs a 12 mm bore with a 50 mm stroke and delivers 56.5 N of push force and 42.4 N of pull force at 0.5 MPa. Its hard-anodized aluminium body and S45C hard-chrome rod suit small clamping and positioning heads, and the short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits inside tight guards and slide fixtures.
The fixed TPU bumper at each end only decelerates the piston; it never holds a load, so add a rod lock or pilot check valve if the position must survive air loss. This model is discontinued - the current direct is the ACE12X50, so confirm ISO 21287 mounting dimensions before swapping.
| Model | Airtac ACP Compact Cylinder ACP12X50 |
|---|---|
| Series | ACP DIN compact cylinder (discontinued) |
| Replacement | ACE12X50 |
| Bore size | Ø12 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| 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 ACE12X50 (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 | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 kgf | |
The ACE12X50 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
| ACP | DIN compact cylinder (double-acting, 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 50 mm stroke swings a small camera or sensor head into place, and the 34 N usable push at 0.5 MPa is ample for a lightweight gate arm.
With 79.2 N of push at 0.7 MPa, the 12 mm bore seats small pins and terminals in electronics assembly where space is minimal.
At 56.5 N push @0.5 MPa this bore sits at the light end of the range: step up to the 16 mm bore (100.5 N) for heavier clamps or down to nothing smaller, since 12 mm is the smallest ACP bore. The 50 mm stroke is the maximum standard stroke for bore 12, so no made-to-order length is needed. The rod ends in a female M3x0.5 thread and the port is M5x0.8 PT. Mounting brackets FA/FB flange, LB foot and CA/CB clevis bolt to the standard face. If you need position feedback, order the -S variant to enable CMSE / DMSE switches - without the -S code there is no magnet. Replacement: ACE12X50.
Replacement checklist
Push is 56.5 N and pull is 42.4 N at 0.5 MPa; at 0.7 MPa push rises to 79.2 N and pull to 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. It is a double acting compact cylinder, 12 mm bore, 50 mm stroke, 6 mm rod with female M3x0.5 thread, M5x0.8 PT port, operating pressure 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, temperature -20 to +70 C, with a fixed TPU bumper at both ends.
Order the ACE12X50, the current-production ISO 21287 successor: swap the P for an E and you get the same bore, stroke and force class in a matching short body. Before swapping, confirm the ISO 21287 mounting dimensions against your fixture, since the ACP was built to the older DIN standard. FA/FB flange, LB foot and CA/CB clevis brackets are available for the ACE family.
Send us the quantity and destination. We confirm price, stock and lead time on the ACE12X50 replacement — usually within 7-8 hours.