This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X25-30SB, 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.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 25mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X25-30SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X25-30SB
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB
The ACPJ12X25-30SB is a double acting compact cylinder with an adjustable extend stroke, now discontinued and superseded by the ISO 21287 ACEJ12X25. Its 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N push at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The -30 code sets a 30 mm adjustment window: a stop screw trims the 25 mm extend stroke down on site, giving a usable range of 0-25 mm without changing cylinders.
Built on a hard-anodized aluminium body with an S45C hard-chrome rod, this short-body unit saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding. The male rod thread (B code) suits knuckle brackets, and because the S code is ordered, the magnet is fitted - CMSE or DMSE switches can be mounted for end-of-stroke sensing. Rule of thumb for sizing: count on about 34 N (roughly 3 kg vertical lift with a 2:1 margin) of real work at 0.5 MPa, not the full 56.5 N rating.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X25-30SB |
| Bore size | Ø12 mm |
| Stroke | 25 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| 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 ACEJ12X25-30SB (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.
Theoretical Output Force (Ø12mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 kgf |
ACPJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
Model Code: Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| -30 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| 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).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB Is Used
Micro part ejection from press dies
The 56.5 N push at 0.5 MPa is enough to strip small stamped clips or pins off a die face, while the 0-25 mm trimmed stroke keeps the cycle inside a compact press bolster.
Position-flagged gate on a lab automation line
With the -S magnet fitted, a CMSE switch signals full extension of the 6 mm rod, confirming a vial tray or slide is clear before the next indexing step.
Light clamping of PCB fixtures
About 34 N of usable force at 0.5 MPa holds a small circuit board against a locator during a solder or test operation, and the male rod thread accepts a knuckle for even loading.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB with the ACEJ12X25-30SB
At 12 mm bore this is the smallest force class in the range: 56.5 N push at 0.5 MPa. Step up to the 16 mm bore for 100.5 N push, or drop to a direct ACEJ12X25 if you need current production. The stop screw only shortens the extend stroke - it is a mechanical end stop, not a mid-stroke lock, so the piston still drifts if air is lost. Pair the male rod thread with an I or Y knuckle, and remember the magnet is present only because the -S code was ordered. Confirm ISO 21287 mounting dimensions before swapping from the DIN-standard ACP footprint.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X25-30SB
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-30SB FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N. The theoretical maximum is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), and rod speed runs 30-500 mm/s on air filtered to 40 um. The 25 mm stroke can be trimmed anywhere from 0-25 mm via the 30 mm adjustment window.
The short ISO 21287-class body cuts roughly 50% of the mounting length of an ISO 15552 profile cylinder, with a fixed TPU bumper at each end and FA flange or LB foot mounting available. The magnet is fitted here because the -S code was ordered, so CMSE or DMSE switches mount directly. The ACPJ family is discontinued - the current-production drop-in is the ACEJ12X25 in the same bore, stroke and force class; confirm the ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X25-30SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X25-30SB replacement — usually within 7-8 hours.