This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACED25X90B, 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 ACPD25X90B is a double acting, double rod DIN-standard tight/compact air cylinder with a Ø25mm bore and 90mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACED25X90B (ISO 21287 ACE), in the same bore, stroke and force class.
A double acting compact cylinder with a rod leaving both covers, the ACPD25X90B pushes and pulls with identical output because both strokes work on the rod-side area: 206.2 N at 0.5 MPa and 288.6 N at 0.7 MPa. The through-rod resists rotation and side load, gives a symmetric mount, and the rear rod can carry a sensor flag. A fixed TPU bumper sits at each end, and the male rod thread (B code) bolts straight to tooling.
The hard-anodized aluminium body with an S45C hard-chrome rod saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and gantries. Note that this model is discontinued: the current-production direct is the ISO 21287 ACED25X90, so confirm mounting dimensions before swapping.
| Model | Airtac ACPD Double Rod Compact Cylinder ACPD25X90B |
|---|---|
| Series | ACPD DIN compact cylinder (discontinued) |
| Replacement | ACED25X90B |
| Bore size | Ø25 mm |
| Stroke | 90 mm |
| Acting type | Double acting, double rod |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 150 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACED25X90B (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 | 206 N |
| 0.7 MPa | 289 N |
| Max (@1.0 MPa) | 42 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). |
|---|---|
| 25 | Bore size in mm. |
| ×90 | 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 rear rod on this 25 mm double-rod unit drives a second fixture or a sensor flag while the front rod moves the part, both strokes delivering 206.2 N at 0.5 MPa over the 90 mm travel.
With about 124 N of usable force at 0.5 MPa and a body roughly 50% shorter than an ISO 15552 profile cylinder, the ACPD25X90B clamps workpieces inside crowded machining jigs where a full-length cylinder will not fit.
At 206.2 N per side, the 25 mm bore sits between the 20 mm (117.8 N) and 32 mm (345.6 N) double-rod sizes at 0.5 MPa - step down for lighter pick-and-place, up if the load needs margin. The 90 mm stroke is well inside the 150 mm standard range for this bore. If a load must stay put when air is lost, add a rod lock or pilot check, since a plain through-rod cylinder drifts. This unit has no magnet; order the -S code if you need CMSE / DMSE switch positions. For new builds, specify the ACED25X90 instead.
Replacement checklist
Because a rod exits both covers, force is equal in both directions: 206.2 N at 0.5 MPa and 288.6 N at 0.7 MPa, with a maximum of 42.0 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 30-500 mm/s. The male rod thread is M6x1.0 and the port is M5x0.8 (PT).
The ACPD25X90B is no longer in production. The current-production replacement is the ACED25X90 (swap the P for an E), an ISO 21287 compact cylinder in the same bore, stroke and force class. Before swapping, confirm the ISO 21287 mounting dimensions against your fixture, since the ACP was built to a DIN-standard body. FA/FB flange and LB foot brackets bolt to the same face family.
Send us the quantity and destination. We confirm price, stock and lead time on the ACED25X90B replacement — usually within 7-8 hours.