This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X50-50SB — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X50-50SB 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 ACPJ12X50-50SB
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50SB 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 ACEJ12X50-50SB (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 → ACEJ12X50-50SB
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50SB
A double acting compact cylinder with an adjustable extend stroke, the ACPJ12X50-50SB carries a 12 mm bore and a 50 mm stroke trimmed by a 50 mm stop-screw window, so the usable extend range runs from 0 to 50 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those figures rise to 79.2 N and 59.4 N, with a theoretical ceiling of 11.5 kgf at 1.0 MPa. The short ISO 21287-class body saves roughly 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.
This unit is ordered with the -S magnet fitted, so CMSE or DMSE reed and solid-state switches can be clamped straight onto the body for end-of-stroke signalling, and the B code gives a male rod thread on the 6 mm rod. A fixed TPU bumper sits at each end to soften arrival, and the stop screw only shortens the extend stroke - it is not a mid-stroke lock, so the piston will still drift if air is lost. Note that the ACPJ family is discontinued; the current-production drop-in is the ACEJ12X50, and buyers should confirm ISO 21287 mounting dimensions before swapping because the ACP was built to a DIN standard. As a rule of thumb, plan on about 34 N (roughly 3 kg of vertical lift at half margin) of real work from the 56.5 N push rating.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X50-50SB |
| 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 ACEJ12X50-50SB (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 ACEJ12X50-50SB 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 ACPJ12X50-50SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -50 | 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 ACPJ12X50-50SB Is Used
Micro part ejection from press dies
The 56.5 N push at 0.5 MPa is enough to strip small stamped terminals or connector pins off a die, and the 0-50 mm adjustable window lets the operator dial the eject distance to the die depth without shimming.
Signalled slide stop on an assembly bench
With the -S magnet fitted, a CMSE switch clamped to the body confirms the 6 mm rod has reached the trimmed extend position, so a pick-and-place gripper on a small electronics fixture only fires when the stop screw position is verified.
Light clamping of PCB test fixtures
About 34 N of practical clamp force at 0.5 MPa holds a circuit board against a bed-of-nails fixture; the compact short body fits inside the test head where an ISO 15552 profile cylinder would be roughly twice as long.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50SB with the ACEJ12X50-50SB
Size both ways before committing: the 16 mm bore in this family delivers 100.5 N push at 0.5 MPa, while stepping down is not possible since 12 mm is the smallest ACPJ bore. If your part weight or process force sits near 34 N or less at 0.5 MPa, this 12 mm unit has a comfortable 2:1 margin. The male rod thread (B code) suits knuckle and tooling attachments, and the fitted -S magnet pairs with CMSE / DMSE switches for position feedback. FA/FB flange and LB foot mounts bolt to the standard face. Because this model is discontinued, order the ACEJ12X50 as the current drop-in and verify the ISO 21287 mounting footprint against your fixture first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X50-50SB
- ✓ 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 ACPJ12X50-50SB 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. Applying a 0.6 working factor to the push rating gives about 34 N of real work, which equates to lifting roughly 3 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), and speed range 30-500 mm/s.
The -50 code is a 50 mm adjustment window: an external stop screw shortens the 50 mm extend stroke anywhere within that window, giving a usable range of 0-50 mm. It is a mechanical end stop only - it never holds or brakes a load, and the piston still drifts if air is lost. The ACPJ family is discontinued; the current-production replacement is the ACEJ12X50 (same bore, stroke and force class). Confirm the ISO 21287 mounting dimensions against your fixture before swapping, since the ACP was built to a DIN standard.
Related AirTAC ACE Cylinders
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