This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X40-20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X40-20 in place of this model. 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 ACPJ12X40-20
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20 is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 40mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X40-20 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X40-20
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20
The ACPJ12X40-20 is a double acting compact cylinder with an adjustable extend stroke: the -20 code gives a 20 mm stop-screw window, so the 40 mm stroke can be trimmed on site anywhere between 20 and 40 mm. Air pushes the piston both ways, delivering 56.5 N forward and 42.4 N back at 0.5 MPa, rising to 79.2 N forward at 0.7 MPa. Its short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into slim jigs and guarded stations where a full-length body will not fit.
Practical sizing: plan on about 34 N of usable push at 0.5 MPa (roughly 60% of the rating), which lifts about 3 kg vertically - and about 1.5 kg with a 2:1 margin for a real part such as a small bracket or sensor head. The hard-anodized aluminium body carries an S45C hard-chrome rod with a female M3x0.5 thread, and fixed TPU bumpers decelerate both ends. Note this model is discontinued: the current drop-in is the ACEJ12X40 (swap the P for an E), so confirm ISO 21287 mounting dimensions before ordering.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-20 |
| Bore size | Ø12 mm |
| Stroke | 40 mm |
| Acting type | Double acting, 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 ACEJ12X40-20 (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 | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 kgf | |
The ACEJ12X40-20 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | 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 (adjustable stroke).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20 Is Used
Small-part ejection from a mold or nest
The 56.5 N push at 0.5 MPa is enough to tip a molded connector or stamped clip off a nest, and the 20-40 mm trim range lets the operator tune the eject travel without changing the cylinder.
Presence check on an electronics assembly line
A short probe stroke between 20 and 40 mm verifies a PCB or connector is seated; order the -S magnet version if CMSE or DMSE switch feedback is needed on the trimmed stroke.
Light clamping inside a compact fixture
With about 34 N of practical clamp force and a body roughly half the length of an ISO 15552 profile cylinder, it clamps thin sheet or small housings in tight fixture pockets.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20 with the ACEJ12X40-20
At 12 mm bore this is the smallest force class in the family: 56.5 N push at 0.5 MPa. Step up to the 16 mm bore for 100.5 N push or the 20 mm bore for 157.1 N at the same pressure if the load is heavier. The stop screw only shortens the extend stroke and does not hold a load on air loss, so add an external stop if position must be retained. Mounting uses FA/FB flanges or LB feet on the standard face, and position sensing requires the optional -S magnet code with CMSE / DMSE switches - this version has no magnet fitted. For new designs, order the ACEJ12X40 instead.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-20
- ✓ 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 ACPJ12X40-20 FAQ
Push is 56.5 N and pull is 42.4 N at 0.5 MPa; at 0.7 MPa push rises to 79.2 N and pull to 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. It is double acting with a 20 mm adjustment window on the 40 mm stroke, runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, M5x0.8 ports and a female M3x0.5 rod thread. The model is discontinued; the ACEJ12X40 is the current replacement.
It is a short-body compact cylinder in the ISO 21287 class, saving about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits narrow jigs and guarded stations. The -20 stop screw trims the extend stroke anywhere from 20 to 40 mm; it is a mechanical end stop only and will not lock the piston if air is lost. Fixed TPU bumpers decelerate both ends of travel, and FA/FB flange or LB foot mounts bolt to the standard face. Confirm ISO 21287 dimensions before swapping to the ACEJ12X40.
Related AirTAC ACE Cylinders
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