This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X70-40S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X70-40S 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 ACPJ12X70-40S
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40S 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 ACEJ12X70-40S (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 → ACEJ12X70-40S
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40S
The ACPJ12X70-40S is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the ordered 70 mm stroke by up to 40 mm, giving a usable range of 30-70 mm on site. The 12 mm bore delivers 56.5 N push and 42.4 N pull 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. Its 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. Note that the 70 mm stroke exceeds the 50 mm maximum standard stroke for bore 12, so this unit is a made-to-order build.
A fixed TPU bumper at each end decelerates the piston, and the optional -S magnet fitted to this model allows CMSE or DMSE reed and solid-state switches for end-position sensing. The hard-anodized aluminium body pairs with an S45C hard-chrome rod and a female M3x0.5 rod thread; ports are M5x0.8. As a rule of thumb, plan on about 34 N (roughly 3 kg vertical lift) of real work at 0.5 MPa rather than the full 56.5 N rating. This ACPJ series is discontinued - the current-production drop-in is the ACEJ12X70, so confirm the ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X70-40S |
| 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 ACEJ12X70-40S (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 ACEJ12X70-40S 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 ACPJ12X70-40S
| 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 ACPJ12X70-40S Is Used
Micro-part ejection from a jig
A 12 mm bore pushing 56.5 N at 0.5 MPa ejects small machined pins or bushings from a drilling fixture, with the 40 mm window letting one setup serve several jig depths.
Position-verified gate on a lab bench
With the fitted -S magnet driving a CMSE switch, the 30-70 mm trimmed stroke confirms a small sliding cover or sample tray has reached its end position before the next step.
Light clamping of electronics housings
About 34 N of practical force at 0.5 MPa holds a plastic enclosure or PCB carrier steady during a screwdriving or test cycle, inside a frame too short for a full-length profile cylinder.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-40S with the ACEJ12X70-40S
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 lighter and space is tighter, the same 12 mm bore in a shorter fixed-stroke ACP may suffice. The 40 mm window suits stations where one cylinder must serve varying part heights - set the stop once, and remember it shortens the extend stroke only; it is a mechanical end stop, not a mid-stroke lock, so the piston still drifts on air loss. Mount via FA/FB flange or LB foot, and keep the -S magnet if you need CMSE / DMSE switch feedback. For new builds, order the ACEJ12X70 instead - this ACPJ model is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X70-40S
- ✓ 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 ACPJ12X70-40S 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; theoretical maximum is 11.5 kgf at 1.0 MPa. It is a double acting adjustable-stroke cylinder, 12 mm bore, 70 mm stroke with a 40 mm trim window (usable 30-70 mm), rod 6 mm with female M3x0.5 thread, M5x0.8 ports, speed 30-500 mm/s, pressure 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), temperature -20 to +70 C, and a fixed TPU bumper at both ends. The 70 mm stroke is a made-to-order length since bore 12 tops out at 50 mm standard.
This unit carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be clamped to the body for extend and retract signals. The ACPJ family is discontinued; the current-production replacement is the ACEJ12X70, an ISO 21287 compact cylinder in the same bore, stroke and force class. Because the ACP is DIN-standard, verify the ISO 21287 mounting dimensions against your fixture before swapping.
Related AirTAC ACE Cylinders
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