This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ASE32X20S, 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 ASP Single Acting Guided Compact Cylinder ASP32X20S is a single acting, push (spring return) DIN-standard tight/compact air cylinder with a Ø32mm bore and 20mm stroke, 1/8" air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ASE32X20S (ISO 21287 ACE), in the same bore, stroke and force class.
The ASP32X20S is a single acting push cylinder with spring return: air extends the 12 mm rod and the internal spring retracts it, so one air line is all the plumbing needs. This 32 mm bore version carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be clamped straight onto the hard-anodized aluminium body to signal end positions. Net of the spring, it pushes 352.5 N at 0.5 MPa and 513.4 N at 0.7 MPa, with a fixed TPU bumper at each end and a female M8x1.25 rod thread.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight fixtures and guarding where a full-length body cannot. Note that this model is discontinued: the current-production replacement is the ASE32X20, and you should confirm the ISO 21287 mounting dimensions before swapping, since the ASP follows the DIN-standard footprint.
| Model | Airtac ASP Single Acting Guided Compact Cylinder ASP32X20S |
|---|---|
| Series | ASP DIN compact cylinder (discontinued) |
| Replacement | ASE32X20S |
| Bore size | Ø32 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push (spring return) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Cushion | Fixed bumper (both ends) |
| Max standard stroke | Up to 25 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ASE32X20S (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 (spring return) |
|---|---|
| 0.5 MPa | 352.5 N |
| 0.7 MPa | 513.4 N |
Single-acting push: air extends the rod; the return spring retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
| ASP | DIN compact cylinder (single-acting push, spring-return, discontinued). |
|---|---|
| 32 | 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 20 mm stroke is enough to swing a clamp arm over a 352.5 N net push at 0.5 MPa, holding an aluminium gearbox housing against a drilling jig while the spring retracts the arm the moment air drops.
Because this -S version carries the magnet, a DMSE switch on the body confirms the part was ejected from a press die, and the spring return clears the die area automatically at cycle end.
Size by net force, not bore: at 0.5 MPa this 32 mm bore delivers 352.5 N after the spring takes its share, while the 25 mm bore gives 210.1 N and the 40 mm bore gives 556.8 N at the same pressure. Keep the working pressure at or above 0.2 MPa so the spring is fully overcome, and remember the spring returns the rod home on air loss rather than holding a mid-stroke position. If you need a flange, foot or clevis, FA/FB, LB and CA/CB mountings bolt to the same face family. Order the ASE32X20 as the current direct and verify the ISO 21287 mounting dimensions first.
Replacement checklist
Net of the return spring, this 32 mm bore pushes 352.5 N at 0.5 MPa and 513.4 N at 0.7 MPa. The working range is 0.2-1.0 MPa (28-145 psi) with 1.5 MPa (215 psi) proof pressure, and 0.2 MPa is the minimum needed to beat the spring. Speed runs 50-500 mm/s on air filtered to 40 um, from -20 to +70 C.
The magnet comes from the -S ordering code, which this model carries, so CMSE or DMSE reed or solid-state switches can be mounted on the body to detect the rod position. At each end of travel a fixed TPU bumper decelerates the piston; it is a passive pad, not an adjustable air feature, and it never locks or holds a load. Since the ASP32X20S is discontinued, plan the swap to the ASE32X20 and confirm the ISO 21287 mounting dimensions.
Send us the quantity and destination. We confirm price, stock and lead time on the ASE32X20S replacement — usually within 7-8 hours.