This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X45-40 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X45-40 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 ACPJ12X45-40
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-40 is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 45mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X45-40 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke45 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X45-40
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-40
The ACPJ12X45-40 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 45 mm stroke by up to 40 mm, giving a usable range of 5-45 mm on site. At 0.5 MPa the 12 mm bore pushes 56.5 N and pulls 42.4 N, rising to 79.2 N at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body cannot.
Built on a hard-anodized aluminium body with an S45C hard-chrome rod, it runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, with fixed TPU bumpers at both ends. Plan on roughly 34 N of real work at 0.5 MPa (about 60% of the push rating), which lifts around 3 kg vertically with a 2:1 margin. Note this model is discontinued: the current-production drop-in is the ACEJ12X45, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-40 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-40 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X45-40 |
| Bore size | Ø12 mm |
| Stroke | 45 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 ACEJ12X45-40 (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 ACEJ12X45-40 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 ACPJ12X45-40
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 ACPJ12X45-40 Is Used
Small-parts ejection in plastic molding
The 5-45 mm trim range lets a mold setter dial in the exact eject distance for thin clips and connectors, using the 56.5 N push at 0.5 MPa to clear parts from shallow cavities.
Bench-top press for electronics assembly
Around 34 N of usable force at 0.5 MPa seats ribbon-cable connectors and small PCB components, while the short body fits inside a compact bench fixture frame.
Product divert on a miniature conveyor
The 42.4 N pull at 0.5 MPa retracts a lightweight pusher arm that nudges small cartons or vials off a narrow lab-scale belt, with the stop screw set to the lane width.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-40 with the ACEJ12X45-40
Size both ways: if 56.5 N push at 0.5 MPa is marginal, step up to the 16 mm bore for 100.5 N; if the load is under about 40 N, the same 12 mm bore in a shorter fixed-stroke ACP may cost less. The 45 mm stroke sits inside the 50 mm maximum standard stroke for this bore. The -40 window suits fixtures where the final position is tuned during commissioning; remember the stop screw is a mechanical end stop, not a mid-stroke lock, so the piston still drifts on air loss. No magnet is fitted on this version; order the -S code if CMSE / DMSE switches are needed. FA/FB flange and LB foot mountings bolt to the standard face. For new builds, specify the ACEJ12X45 instead.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X45-40
- ✓ 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 ACPJ12X45-40 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 45 mm extend stroke by up to 40 mm, so the working range is 5-45 mm. It shortens the stroke only and acts as a mechanical end stop, not a load-holding lock. Operating range is 0.15-1.0 MPa (22-145 psi) at 30-500 mm/s.
No, the ACPJ12X45-40 is discontinued. The current-production replacement is the ACEJ12X45 (swap the P for an E), an ISO 21287 compact cylinder in the same 12 mm bore, 45 mm stroke and force class. Confirm the ISO 21287 mounting dimensions against your fixture before swapping, since the ACP was built to a DIN-standard footprint. FA/FB flange and LB foot options carry over, and the optional -S magnet enables CMSE / DMSE switches on the replacement.
Related AirTAC ACE Cylinders
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