This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X50-40SB — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X50-40SB 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 ACPJ12X50-40SB
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-40SB is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 50mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X50-40SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X50-40SB
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-40SB
The ACPJ12X50-40SB is a double acting, adjustable-stroke compact cylinder with a 12 mm bore and a 50 mm stroke that AirTAC has since discontinued. A stop screw trims the extend stroke anywhere inside the 40 mm window, so the working range runs from 10 mm to the full 50 mm. Air enters through M5x0.8 ports, the rod is 6 mm with a male thread (the B code), and a fixed TPU bumper sits at each end. Note that the adjuster is a mechanical end stop only: on air loss the piston still drifts, so it never holds or brakes a load.
Built on the short ISO 21287 body, it saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight jigs and guarding where a full-length body cannot. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those rise to 79.2 N and 59.4 N, with a theoretical 11.5 kgf at 1.0 MPa. Plan on roughly 34 N (about 3.5 kgf) of real work at 0.5 MPa, which lifts around 2.9 kg vertically with a 2:1 margin. This unit carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be mounted for end-of-stroke sensing. The current-production drop-in is the ACEJ12X50; confirm the ISO 21287 mounting dimensions before swapping, since the ACP was DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-40SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-40SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X50-40SB |
| Bore size | Ø12 mm |
| Stroke | 50 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 ACEJ12X50-40SB (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 ACEJ12X50-40SB 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 ACPJ12X50-40SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 ACPJ12X50-40SB Is Used
Small-part ejection in plastic moulding
A 34 N usable push at 0.5 MPa clears finished clips or bushings off a mould face; the 10-50 mm adjustable range lets the setter dial the eject distance without changing cylinders.
Pick-and-place verification on electronics feeders
With the -S magnet fitted, a CMSE switch confirms the 6 mm rod has fully seated a connector or tray, catching misloads on SMT feeder benches at up to 500 mm/s.
Light clamping of PCB fixtures
Around 2.9 kg of vertical-lift margin holds thin circuit boards against a drill or test jig; the short ISO 21287 body fits inside the fixture frame where a longer cylinder will not.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-40SB with the ACEJ12X50-40SB
Size both ways before ordering: at 0.5 MPa the 16 mm bore pushes 100.5 N, nearly double this 12 mm unit's 56.5 N, while stepping down is not possible because 12 mm is the smallest bore in the family. If your part weight stays under about 3 kg, the 12 mm bore with a 2:1 margin is the right call. The male rod thread (B) suits I/Y knuckles and FTC brackets on the ISO 21287 face; FA/FB flanges and LB feet bolt straight on. The -S magnet is fitted here, so CMSE / DMSE switches work out of the box. Remember the stop screw only shortens the extend stroke and does not lock it mid-travel. Since ACPJ is discontinued, order the ACEJ12X50 as the current replacement and verify the ISO 21287 mounting dimensions first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X50-40SB
- ✓ 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 ACPJ12X50-40SB FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa push is 79.2 N and pull 59.4 N; the theoretical maximum is 11.5 kgf at 1.0 MPa. In practice budget about 34 N (roughly 3.5 kgf) for real work at 0.5 MPa, which lifts about 2.9 kg vertically with a 2:1 margin. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, and the port is M5x0.8.
The -40 code is a 40 mm adjustment window: an external stop screw shortens the 50 mm extend stroke to any point from 10 mm to 50 mm. It is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. Fixed TPU bumpers decelerate at both ends. The ACPJ family is discontinued; the current-production drop-in is the ACEJ12X50, which matches the same bore, stroke and force class on the ISO 21287 body. Confirm the ISO 21287 mounting dimensions before swapping, because the ACP was DIN-standard.
Related AirTAC ACE Cylinders
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