This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X125-10B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X125-10B 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 ACPJ12X125-10B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-10B is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 125mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X125-10B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X125-10B
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-10B
This is a double acting compact cylinder with an adjustable extend stroke, built on the DIN-standard ACP short body: a hard-anodized aluminium barrel with threaded aluminium covers, an S45C hard-chrome piston rod and a fixed TPU bumper at each end. The 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa (79.2 N / 59.4 N at 0.7 MPa), running at 30-500 mm/s on 0.15-1.0 MPa (22-145 psi) filtered air. The 125 mm stroke is longer than the 50 mm maximum standard stroke for this bore, so it is a made-to-order build.
The -10 code adds a 10 mm adjustment window: an external stop screw trims the extend stroke anywhere within 115-125 mm, so one cylinder can be tuned to several fixture positions on site. The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits slim slides and guarded stations. As a rule of thumb, plan on about 34 N (roughly 3 kg of vertical lift with a 2:1 margin) of usable work at 0.5 MPa rather than the full rating. Note the stop is a mechanical end stop, not a mid-stroke lock: on air loss the piston still drifts. This model is discontinued; the current-production drop-in is the ACEJ12X125, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-10B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-10B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X125-10B |
| Bore size | Ø12 mm |
| Stroke | 125 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 ACEJ12X125-10B (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 ACEJ12X125-10B 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 ACPJ12X125-10B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -10 | 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 ACPJ12X125-10B Is Used
Small-parts ejection in plastic molding
The 56.5 N push at 0.5 MPa is enough to kick light molded clips or bushings off a fixture, and the 10 mm trim window lets operators fine-tune the eject position without shimming.
Compact test-and-sort stations
With a body about 50% shorter than an ISO 15552 profile cylinder, the 12 mm bore slides into guarded electronics sorters where space above the part is minimal; add the -S magnet code on the replacement for CMSE / DMSE switching.
Light clamping on PCB test rigs
About 3 kg of vertical lift capacity with a 2:1 margin at 0.5 MPa holds thin circuit boards or small housings down during probing, with the male rod thread simplifying knuckle attachment.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-10B with the ACEJ12X125-10B
At 12 mm bore you are at the light end of the range: 56.5 N push at 0.5 MPa. If your jig 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). The B code gives a male 6 mm rod thread; the port is M5x0.8. FA/FB flange and LB foot mounts bolt to the standard face, and I/Y rod knuckles are available. Position sensing requires the optional -S magnet code for CMSE / DMSE switches - this model has no S code, so no magnet is fitted and no switch can be mounted. Since ACPJ is discontinued, order the ACEJ12X125 as the current replacement and verify the ISO 21287 mounting footprint first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X125-10B
- ✓ 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 ACPJ12X125-10B FAQ
At 0.5 MPa the 12 mm bore gives 56.5 N push and 42.4 N pull; at 0.7 MPa it gives 79.2 N push and 59.4 N pull, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -10 code provides a 10 mm adjustment window, so the 125 mm extend stroke can be trimmed anywhere in a 115-125 mm range via the external stop screw. The 125 mm stroke is a made-to-order length because the bore's standard maximum is 50 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi) and speed is 30-500 mm/s.
It uses a hard-anodized aluminium body with threaded aluminium covers, an S45C hard-chrome rod, a fixed TPU bumper at both ends and an M5x0.8 port. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, and FA/FB flange plus LB foot mounts bolt to the standard face. The ACPJ family is no longer in production: the current drop-in is the ACEJ12X125 in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping, since the ACP was built to a DIN standard.
Related AirTAC ACE Cylinders
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