This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACE12X20SB, 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 ACP12X20SB is a double acting DIN-standard tight/compact air cylinder with a Ø12mm bore and 20mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACE12X20SB (ISO 21287 ACE), in the same bore, stroke and force class.
A double acting compact cylinder in the DIN-standard ACP series, the ACP12X20SB pairs a 12 mm bore with a 20 mm stroke and a male rod thread. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those figures rise to 79.2 N and 59.4 N, with a theoretical ceiling of 11.5 kgf at 1.0 MPa. 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.
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 where a full-length body will not fit. Because this model carries the -S magnet option, CMSE or DMSE reed and solid-state switches can be mounted for end-of-stroke sensing. Note this model is discontinued; the current-production direct is the ACE12X20, so confirm ISO 21287 mounting dimensions before swapping.
| Model | Airtac ACP Compact Cylinder ACP12X20SB |
|---|---|
| Series | ACP DIN compact cylinder (discontinued) |
| Replacement | ACE12X20SB |
| Bore size | Ø12 mm |
| Stroke | 20 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 ACE12X20SB (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 ACE12X20SB 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. |
| ×20 | 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).
A 56.5 N push at 0.5 MPa is enough to strip small plastic caps or stamped clips out of a mold nest on an injection or press tool, and the 20 mm stroke keeps the die pack tight.
With the -S magnet fitted, CMSE or DMSE switches confirm clamp and release on small electronics assembly jigs, so the PLC only cycles when the rod is fully home.
The short body and M5x0.8 port suit compact sample slides and reagent tray pushers on benchtop diagnostic equipment, where about 2.9 kg of vertical lift margin covers light tray loads.
At 12 mm bore this is the smallest force class in the range: 56.5 N push at 0.5 MPa. If your load needs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa) or the 20 mm bore (157.1 N); if 56.5 N is generous, there is nothing smaller in the family. The 20 mm stroke sits well inside the 50 mm maximum standard stroke for this bore, so no made-to-order stroke is needed. The male rod thread (B code) suits knuckle and tooling attachments, and the fitted -S magnet accepts CMSE / DMSE switches. A plain cylinder does not hold position when air is lost, so add a rod lock or pilot check valve for a held load. Order the ACE12X20 as the current replacement and verify ISO 21287 mounting dimensions.
Replacement checklist
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa, 79.2 N push and 59.4 N pull; theoretical maximum is 11.5 kgf at 1.0 MPa. It is double acting with a 12 mm bore, 20 mm stroke, 6 mm rod, M5x0.8 port, male rod thread, operating pressure 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s and a fixed TPU bumper at both ends.
Order the ACE12X20, the ISO 21287 successor made by swapping the P for an E. It matches the same bore, stroke and force class with a comparable short body and mounting family, but confirm the ISO 21287 mounting dimensions against your fixture before swapping, since the ACP was built to a DIN standard.
Send us the quantity and destination. We confirm price, stock and lead time on the ACE12X20SB replacement — usually within 7-8 hours.