This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X40-20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X40-20S 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 ACPJ12X40-20S
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20S 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 ACEJ12X40-20S (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 → ACEJ12X40-20S
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20S
Double acting and adjustable, the ACPJ12X40-20S is a DIN-standard compact cylinder with a 12 mm bore and 40 mm stroke. A stop screw trims the extend stroke by up to 20 mm on site, giving a usable range of 20-40 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa that rises to 79.2 N and 59.4 N, with a theoretical 11.5 kgf at 1.0 MPa. The -S code means the magnet is fitted, so CMSE or DMSE reed and solid-state switches can be clamped straight onto the body for end-of-stroke signalling.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into cramped jigs and guarding where a full-length body will not go. In practice, plan for roughly 34 N of real work at 0.5 MPa (about 0.6 of the push rating), which lifts around 3.5 kg vertically; halving again for a 2:1 margin gives a safe lift of about 2.9 kg. Note this model is discontinued: the current-production replacement is ACEJ12X40, so confirm ISO 21287 mounting dimensions before swapping, since the ACP was built to DIN-standard dimensions.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-20S |
| 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 ACEJ12X40-20S (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 ACEJ12X40-20S 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 ACPJ12X40-20S
| 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 ACPJ12X40-20S Is Used
Small-part ejection from press dies
The 56.5 N push at 0.5 MPa clears stamped terminals and connector pins off a die face, while the 20-40 mm adjustable range lets the toolmaker dial in the exact eject position without shimming.
Position-verified gate latch on a lab autosampler
With the fitted -S magnet and a CMSE switch, the PLC confirms the 6 mm rod has fully retracted before the sample arm moves, at cycle speeds up to 500 mm/s.
Light hold-down of PCBs in a test fixture
About 34 N of usable clamping force at 0.5 MPa is enough to seat a circuit board against pogo pins, and the compact body fits inside the fixture lid where a full-length cylinder cannot.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-20S with the ACEJ12X40-20S
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 (100.5 N push) if the load needs nearly double, or stay here for light clamping and indexing. The 20 mm adjustment window suits fixtures where the final position is tuned after installation; remember the stop screw only shortens the extend stroke and drifts on air loss, so it is not a load-holding lock. The female M3x0.5 rod thread takes I/Y knuckles, FA/FB flanges and LB feet bolt to the face, and the fitted -S magnet pairs with CMSE/DMSE switches. Order the ACEJ12X40 as the current drop-in.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-20S
- ✓ 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 ACPJ12X40-20S 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, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -20 code gives a 20 mm adjustment window, so the 40 mm extend stroke can be trimmed anywhere down to 20 mm with the external stop screw. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and the M5x0.8 port depends only on the 12 mm bore.
No - the ACPJ family is discontinued. The current-production drop-in is ACEJ12X40 (swap the P for an E), which matches the same 12 mm bore, 40 mm stroke and force class in the ISO 21287 short-body format. Because the ACP was built to DIN-standard dimensions, confirm the ISO 21287 mounting hole pattern and overall length against your fixture before ordering. This unit carries the optional -S magnet for CMSE/DMSE switches, and the fixed TPU bumpers at both ends simply decelerate the piston at each end of travel.
Related AirTAC ACE Cylinders
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