This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X25-20SB, 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 ACPJ12X25-20SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X25-20SB 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 ACEJ12X25-20SB (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 → ACEJ12X25-20SB
- 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 ACPJ12X25-20SB
This discontinued ACPJ12X25-20SB is a double acting compact cylinder with an adjustable extend stroke: the -20 stop screw trims the 25 mm stroke by up to 20 mm, giving a usable 5-25 mm range set on site. At 0.5 MPa the 12 mm bore pushes 56.5 N and pulls 42.4 N, enough for light clamping and sorting heads. The male rod thread (B code) and the fitted -S magnet for CMSE / DMSE switches are built into this code.
The hard-anodized aluminium body follows the ISO 21287 short format, saving roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarding. For sizing, treat about 34 N (0.6 of the push force) as the practical working load, which corresponds to lifting roughly 3 kg vertically with margin. Production has ended: the current drop-in is ACEJ12X25 in the same bore, stroke and force class - confirm ISO 21287 mounting dimensions before swapping, since the ACP series was DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-20SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-20SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X25-20SB |
| 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 ACEJ12X25-20SB (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 ACPJ12X25-20SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| -20 | 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 ACPJ12X25-20SB Is Used
Micro part ejection
Ejects small machined pins or stamped parts from a nest, where the 5-25 mm trimmed stroke and 56.5 N push at 0.5 MPa clear parts under 3 kg without overshoot.
Position-verified check fixture
The fitted -S magnet drives a CMSE or DMSE switch to confirm the gauge has reached its set stop inside a tight inspection fixture.
Light electronics clamp
Holds PCB assemblies or connector housings during a solder or test cycle, using about 34 N of usable force at the male-threaded rod end.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X25-20SB with the ACEJ12X25-20SB
At 12 mm bore this is the lightest ACPJ size: 56.5 N push at 0.5 MPa versus 100.5 N for a 16 mm bore and 157.1 N for a 20 mm bore, so step up if your clamp needs more than about 34 N of real work. The 25 mm stroke sits inside the 50 mm maximum standard stroke for this bore, so no made-to-order length is involved. The -20 window suits jigs where the final stop position is tuned during commissioning. Note the stop screw is a mechanical end stop only - on air loss the piston still drifts, so it is not a load-holding lock. FA/FB flange and LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches. Order ACEJ12X25 as the current-production replacement.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X25-20SB
- ✓ 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 ACPJ12X25-20SB 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; theoretical maximum is 11.5 kgf at 1.0 MPa. As a rule of thumb plan on about 34 N of real work, which lifts roughly 3 kg vertically with a 2:1 margin. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s.
The -20 code gives a 20 mm adjustment window: an external stop screw shortens the 25 mm extend stroke to any setting from 5 mm up, within the ordered window only - it cannot lengthen the stroke. A fixed TPU bumper pads both ends. The model is discontinued; the current-production drop-in is ACEJ12X25 in the same bore, stroke and force class. Confirm ISO 21287 mounting dimensions before swapping, because the ACP series was DIN-standard.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X25-20SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X25-20SB replacement — usually within 7-8 hours.