This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X125-50 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X125-50 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 ACPJ12X125-50
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-50 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 ACEJ12X125-50 (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 → ACEJ12X125-50
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-50
This is a double acting compact cylinder with an adjustable extend stroke: bore 12 mm, stroke 125 mm, and a 50 mm adjustment window set by the -50 code. A stop screw trims the extend stroke anywhere in the 75-125 mm range on site, so one cylinder covers several jig positions. Push force is 56.5 N and pull 42.4 N at 0.5 MPa, rising to 79.2 N at 0.7 MPa, with a theoretical maximum of 11.5 kgf at 1.0 MPa. Note the 125 mm stroke is longer than the 50 mm standard maximum for this bore, so it is a made-to-order build.
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 fixtures and guarding where a full-length body will not fit. In practice, plan for about 34 N of usable push at 0.5 MPa, which lifts roughly 2.9 kg vertically with a 2:1 margin. A fixed TPU bumper sits at both ends, the hard-anodized aluminium body carries an S45C hard-chrome rod, and the rod end is female M3x0.5. No magnet is fitted on this version; the optional -S code adds one for CMSE / DMSE switches. This model is discontinued - the current drop-in is ACEJ12X125, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-50 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-50 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X125-50 |
| 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 ACEJ12X125-50 (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 ACEJ12X125-50 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 ACPJ12X125-50
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×125 | 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 ACPJ12X125-50 Is Used
Small-part press fitting
Pressing dowel pins or bushings into plastic housings on an electronics assembly bench, where the 75-125 mm adjustable range lets one cylinder serve several fixture depths and 56.5 N at 0.5 MPa suits light interference fits.
Pick-and-place gating
Extending a gate or stopper on a compact conveyor divert station, where the short body fits under guarding and the made-to-order 125 mm stroke reaches across a narrow product lane.
Lab dispenser actuation
Driving a small syringe or valve plunger in a laboratory dosing unit, where the female M3x0.5 rod thread takes a custom knuckle and about 2.9 kg of vertical lift covers a light dosing head.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-50 with the ACEJ12X125-50
Size both ways: if 56.5 N of push at 0.5 MPa is more than your load needs, the same family in a smaller format will not go lower than this 12 mm bore, so check whether a shorter stroke or lower pressure suits instead; if you need more force, step up to the 16 mm bore for 100.5 N push or the 20 mm bore for 157.1 N at 0.5 MPa. The stop screw is a mechanical end stop only - on air loss the piston still drifts, so it is not a load-holding lock. FA/FB flange and LB foot mountings bolt to the standard face, and ordering the -S code enables CMSE / DMSE switch positions. For new projects, specify the current-production ACEJ12X125 instead and verify the ISO 21287 mounting dimensions.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X125-50
- ✓ 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 ACPJ12X125-50 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; theoretical maximum is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, fluid air filtered to 40 um. Port is M5x0.8, rod thread female M3x0.5, and the 125 mm stroke is a made-to-order length above the 50 mm standard maximum for this bore.
The -50 code sets a 50 mm window: an external stop screw shortens the extend stroke anywhere between 75 and 125 mm, so you can dial in the exact reach on the machine without changing cylinders. The stop is a mechanical end stop, not a mid-stroke lock, so the rod can still drift if air is lost. The ACPJ family is discontinued; the current-production replacement is ACEJ12X125, a drop-in in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
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