This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X40-40S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X40-40S 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 ACPJ12X40-40S
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-40S 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 ACEJ12X40-40S (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 → ACEJ12X40-40S
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-40S
The ACPJ12X40-40S is a double acting compact cylinder with an adjustable stroke: a stop screw trims the 40 mm extend stroke anywhere within the 40 mm window, giving a usable range of 0-40 mm on site. In this 12 mm bore the rod delivers 56.5 N pushing and 42.4 N pulling 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. A practical rule of thumb: plan for roughly 34 N of real work at 0.5 MPa, which lifts about 3 kg vertically with a 2:1 margin.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures where a full-length body will not fit. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers at both ends, and the -S magnet this model carries lets CMSE / DMSE reed or solid-state switches report position. Note that this ACPJ series is discontinued; the current-production drop-in is the ACEJ12X40, so confirm ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-40S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-40S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-40S |
| 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 ACEJ12X40-40S (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 ACEJ12X40-40S 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 ACPJ12X40-40S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -40 | 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 ACPJ12X40-40S Is Used
Position-verified micro part ejection
Ejects small electronic components from an assembly nest, with the -S magnet and a CMSE switch confirming the trimmed extend stroke was reached before the next cycle.
Light clamping on a PCB test fixture
The 42.4 N pull at 0.5 MPa holds a circuit board against locating pins during probing, while the 0-40 mm adjustable range lets technicians dial in the clamp travel without shims.
Sample vial indexing in a lab autoloader
Pushes a 12 mm vial rack one station at a time inside a compact analyzer housing where only a short-body cylinder fits, running at 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-40S with the ACEJ12X40-40S
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 the 20 mm bore for 157.1 N push at the same pressure if the load is heavier. The stop screw is a mechanical end stop for the extend stroke only, not a mid-stroke lock, so the piston still drifts if air is lost. FA/FB flange and LB foot mountings bolt to the standard face, and the fitted -S magnet accepts CMSE / DMSE switches. For new designs, order the ACEJ12X40 instead, as this model is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-40S
- ✓ 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 ACPJ12X40-40S 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. The -40 code is a 40 mm adjustment window: a stop screw shortens the 40 mm extend stroke by up to 40 mm, so the usable range is 0-40 mm. It shortens the stroke only and acts as an end stop, not a load-holding brake. Operating pressure is 0.15-1.0 MPa (22-145 psi) and speed is 30-500 mm/s.
No, the ACPJ series is discontinued. The current-production replacement is the ACEJ12X40, which matches the same 12 mm bore, 40 mm stroke and force class with a matching short ISO 21287 body. Because the ACP is DIN-standard, confirm the ISO 21287 mounting dimensions and the M5x0.8 port position before swapping. This unit carries the optional -S magnet for CMSE / DMSE switches, and fixed TPU bumpers sit at both ends.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X40-40S
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