This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ16X125-40S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ16X125-40S 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 ACPJ16X125-40S
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40S is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø16mm 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 ACEJ16X125-40S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ16 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM4×0.7
- StatusDiscontinued → ACEJ16X125-40S
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40S
The ACPJ16X125-40S is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 125 mm stroke by up to 40 mm on site, giving a usable range of 85-125 mm. Air works on both faces of the 16 mm piston, pushing 100.5 N and pulling 75.4 N at 0.5 MPa, rising to 140.7 N at 0.7 MPa. The 125 mm stroke is longer than the 75 mm standard limit for bore 16, so this unit is made to order. Note this model is discontinued - the current-production replacement is the ACEJ16X125, so confirm ISO 21287 mounting dimensions before swapping.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight jigs and guarding where a full-length body cannot fit. The -S code on this model means the magnet is fitted, so CMSE / DMSE reed or solid-state switches can be clamped straight onto the hard-anodized aluminium body. In practice, plan for roughly 60 N (about 6 kg of vertical lift) of real work at 0.5 MPa rather than the full 100.5 N rating, and remember the fixed TPU bumper at each end only decelerates the rod - it never locks or holds a load if air is lost.
Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ16X125-40S |
| Bore size | Ø16 mm |
| Stroke | 125 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 75 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ16X125-40S (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 (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 101 N | 75 N |
| 0.7 MPa | 141 N | 106 N |
| Max (@1.0 MPa) | 21 kgf | |
The ACEJ16X125-40S 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 ACPJ16X125-40S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 16 | Bore size in mm. |
| ×125 | 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 ACPJ16X125-40S Is Used
Fixture clamping on CNC pallets
The 85-125 mm adjustable extend range lets a jig builder dial in clamp travel per pallet, with about 60 N of usable clamp force at 0.5 MPa on small aluminium brackets.
Position-verified ejector in a test rig
Because the -S magnet is fitted, CMSE or DMSE switches confirm the rod has reached the trimmed stop position before the PLC releases the part.
Carton push-off under a low guard
A body about 50% shorter than an ISO 15552 profile cylinder slides under tight guarding on a packaging line, pushing light cartons at 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ16X125-40S with the ACEJ16X125-40S
Size the load both ways: at 0.5 MPa this bore gives 100.5 N push and 75.4 N pull, while a 12 mm bore manages only 56.5 N push and a 20 mm bore reaches 157.1 N - step up if your part weight or friction demand more. Keep the working force near 60 N (about 6 kg vertical) for a comfortable margin. The 40 mm window means the machine can be tuned between 85 mm and 125 mm extend travel without changing cylinders; the stop is a mechanical end stop, not a mid-stroke lock, so the rod still drifts on air loss. FA/FB flange or LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches. For new builds, order the ACEJ16X125 instead - this ACPJ is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ16X125-40S
- ✓ 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 ACPJ16X125-40S FAQ
At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa that rises to 140.7 N push and 105.6 N pull, with a theoretical maximum of 20.5 kgf at 1.0 MPa. It is double acting, runs on air filtered to 40 um at 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, with an M5x0.8 port, an M4x0.7 female rod thread on the 8 mm rod, and a 40 mm stroke adjustment window (85-125 mm usable). The 125 mm stroke is non-standard for bore 16 and is made to order.
The ACPJ family is no longer in production; the current drop-in is the ACEJ16X125 (same P-to-E swap), which matches the bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard. On the ACPJ itself, the extend stroke is trimmed by an external stop screw within the ordered 40 mm window - it shortens travel only, never lengthens it past 125 mm, and it is not a load-holding brake.
Related AirTAC ACE Cylinders
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