This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ASE25X15B, 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 ASP25X15B is a single acting, push (spring return) DIN-standard tight/compact air cylinder with a Ø25mm bore and 15mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ASE25X15B (ISO 21287 ACE), in the same bore, stroke and force class.
A single acting push cylinder with spring return, the discontinued ASP25X15B uses compressed air to extend its 10 mm rod and an internal spring to retract it, so one air line is all the plumbing a 25 mm bore clamp or ejector needs. At 0.5 MPa it delivers 210.1 N of push already net of the spring, rising to 308.3 N at 0.7 MPa, and it starts moving from 0.2 MPa. The male rod thread (the B code) bolts straight to I/Y knuckles on standard fixtures.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight jigs and guarding where a full-length body will not fit. A fixed TPU bumper at each end decelerates the rod; on air loss the spring drives it home retracted, it never holds a mid-stroke position. This model is discontinued: the current-production direct is the ASE25X15, so confirm ISO 21287 mounting dimensions before swapping.
| Model | Airtac ASP Single Acting Guided Compact Cylinder ASP25X15B |
|---|---|
| Series | ASP DIN compact cylinder (discontinued) |
| Replacement | ASE25X15B |
| Bore size | Ø25 mm |
| Stroke | 15 mm |
| Acting type | Single acting, push (spring return) |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 ASE25X15B (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 | 210.1 N |
| 0.7 MPa | 308.3 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). |
|---|---|
| 25 | Bore size in mm. |
| ×15 | 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 210.1 N net push at 0.5 MPa holds small aluminium brackets against a drill jig, and the spring retracts the 10 mm rod the moment air is dumped.
A 15 mm stroke is enough to nudge finished pins off a nest; the short body fits under the tooling plate where a full-length profile cylinder cannot.
On a light packaging line the male-threaded rod drives a flap guide at 50-500 mm/s, and the spring return keeps the guide clear between cartons.
Size the bore to the load: if 210.1 N at 0.5 MPa is marginal, the 32 mm bore gives 352.5 N; if the load is light and space is tighter, the 20 mm bore still offers 127.4 N. Keep strokes short - single-acting bores like this are meant for compact 15 mm-class moves, not long travels. Order the -S code if you want the optional magnet for CMSE / DMSE switches; this non-S unit has no magnet, so no sensor can be mounted. Choose FA/FB flange or LB foot / CA/CB clevis to match the fixture. Since the ASP is discontinued, specify the ASE25X15 as the current replacement and verify the ISO 21287 mounting footprint first.
Replacement checklist
It is a single acting push, spring-return cylinder: push is 210.1 N at 0.5 MPa and 308.3 N at 0.7 MPa, both already net of the return spring. Working range is 0.2-1.0 MPa (28-145 psi) with 1.5 MPa (215 psi) proof pressure, air filtered to 40 um, speed 50-500 mm/s, temperature -20 to +70 C, port M5x0.8 and a male rod thread on the 10 mm rod.
The hard-anodized aluminium body is an ISO 21287-class short build that saves about 50% of the mounting length of an ISO 15552 profile cylinder, with FA/FB flange, LB foot and CA/CB clevis options and a fixed TPU bumper at both ends. The ASP family is discontinued; the current-production direct is the ASE25X15 (same bore, stroke and force class), so confirm the ISO 21287 mounting dimensions before converting.
Send us the quantity and destination. We confirm price, stock and lead time on the ASE25X15B replacement — usually within 7-8 hours.