This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X70-40 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X70-40 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 ACPJ12X70-40
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40 is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 70mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X70-40 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke70 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X70-40
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40
The ACPJ12X70-40 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 70 mm stroke by up to 40 mm on site, giving a usable range of 30-70 mm. This 12 mm bore unit delivers 56.5 N push and 42.4 N pull at 0.5 MPa (79.2 N / 59.4 N at 0.7 MPa), with a theoretical peak of 11.5 kgf at 1.0 MPa. Its hard-anodized aluminium body and S45C hard-chrome rod run on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body will not fit. The 70 mm stroke exceeds the 50 mm standard maximum for bore 12, so it is a made-to-order build. Note the adjuster is a mechanical end stop only - on air loss the piston still drifts, so it never holds a load. This model is discontinued; the current-production drop-in is the ACEJ12X70, and buyers should confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X70-40 |
| Bore size | Ø12 mm |
| Stroke | 70 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 ACEJ12X70-40 (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 ACEJ12X70-40 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 ACPJ12X70-40
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×70 | 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 ACPJ12X70-40 Is Used
Small-part ejection from plastic molds
The 30-70 mm trim range and 56.5 N push at 0.5 MPa suit nudging finished clips or caps off a mold table where space beside the tool is minimal.
Gate and latch actuation on compact enclosures
A 42.4 N pull at 0.5 MPa swings light interlock gates on inspection cabinets; add the -S magnet code if you later need CMSE / DMSE position feedback.
Sample pusher in lab automation
The 6 mm rod and M5x0.8 ports fit micro slide assemblies that index vials or slides, with the stop screw set to a repeatable trimmed stroke.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40 with the ACEJ12X70-40
At 12 mm bore this is the smallest force class in the range: 56.5 N push at 0.5 MPa. If your load needs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa) or the 20 mm bore (157.1 N push at 0.5 MPa). For a real-world margin, plan on about 34 N of usable work at 0.5 MPa, which corresponds to lifting roughly 1.7 kg vertically with a 2:1 safety factor. Mounting is FA/FB flange or LB foot; the rod end here is female M3x0.5, and the male-thread B variant is available if your tooling needs it. No magnet is fitted on this code - order the -S version if you need CMSE / DMSE switch positions. Since the ACPJ is discontinued, spec the ACEJ12X70 as the current replacement and verify the ISO 21287 footprint.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X70-40
- ✓ 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 ACPJ12X70-40 FAQ
Push is 56.5 N and pull 42.4 N at 0.5 MPa; at 0.7 MPa it reaches 79.2 N push and 59.4 N pull, with a theoretical maximum of 11.5 kgf at 1.0 MPa. It is double acting, runs on 0.15-1.0 MPa (22-145 psi) air filtered to 40 um, moves at 30-500 mm/s over a 30-70 mm trimmed stroke, and uses M5x0.8 ports with a female M3x0.5 rod thread. The 70 mm stroke is a made-to-order length above the 50 mm standard maximum for bore 12.
The -40 code sets a 40 mm adjustment window: an external stop screw shortens the extend stroke anywhere within it, so you can dial the effective stroke between 30 and 70 mm without changing cylinders. It is a mechanical end stop, not a mid-stroke lock, so the rod can drift if air is lost. Fixed TPU bumpers decelerate both ends. The ACPJ family is discontinued; the ACEJ12X70 is the current ISO 21287 drop-in in the same bore, stroke and force class - confirm its mounting dimensions before converting.
Related AirTAC ACE Cylinders
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