This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X120-20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X120-20S 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 ACPJ20X120-20S
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20S is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø20mm bore and 120mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ20X120-20S (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke120 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- StatusDiscontinued → ACEJ20X120-20S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20S
Double acting and adjustable in stroke, the ACPJ20X120-20S is a discontinued DIN-standard compact cylinder with a 20 mm bore and a 120 mm stroke trimmed by a 20 mm stop-screw window, so the extend stroke can be set anywhere between 100 and 120 mm on site. Push force is 157.1 N and pull force 117.8 N at 0.5 MPa; at 0.7 MPa it delivers 219.9 N push and 164.9 N pull, with a theoretical maximum of 32 kgf at 1.0 MPa. The 120 mm stroke exceeds the 100 mm maximum standard stroke for bore 20, so this unit is made to order.
The short ISO 21287-class body saves roughly 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 will not fit. For sizing, plan on about 94 N of real work at 0.5 MPa (roughly 60% of the push rating), which translates to lifting about 8 kg vertically, or about 4 kg with a 2:1 margin. The -S code means the optional magnet is fitted on this model, so CMSE / DMSE reed or solid-state switches can be mounted directly. Since the ACPJ is discontinued, the current-production drop-in is the ACEJ20X120; confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X120-20S |
| Bore size | Ø20 mm |
| Stroke | 120 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 100 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ20X120-20S (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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | 165 N |
| Max (@1.0 MPa) | 32 kgf | |
The ACEJ20X120-20S 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 ACPJ20X120-20S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | Stroke length in mm. |
| -20 | 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 ACPJ20X120-20S Is Used
Fixture clamp with trimmed stroke
On a CNC jig for aluminium brackets, the stop screw trims the 120 mm extend stroke down to 100 mm so the clamp seats on the part without over-travel, using 157.1 N push at 0.5 MPa.
Packaging line part ejector
A food-packaging conveyor uses the 117.8 N pull stroke to retract a pusher plate between cartons, with the fitted magnet and a DMSE switch confirming home position at up to 500 mm/s.
Small vertical lift in a test rig
An electronics test station lifts about 4 kg fixture plates vertically with a 2:1 margin, the short body fitting inside a guard where a full-length profile cylinder would not.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20S with the ACEJ20X120-20S
At 20 mm bore this sits in the mid range: the 16 mm bore gives 100.5 N push at 0.5 MPa for lighter clamping, while stepping up in force class means moving to a larger bore. Choose the -20 window only if your fixture needs the extend stroke trimmed between 100 and 120 mm; the stop screw is a mechanical end stop, not a mid-stroke lock, so the piston still drifts on air loss. FA/FB flange and LB foot mountings bolt to the standard face, and the fitted -S magnet accepts CMSE / DMSE switches. For new projects order the ACEJ20X120, the current replacement in the same bore, stroke and force class.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X120-20S
- ✓ 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 ACPJ20X120-20S FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa it pushes 219.9 N and pulls 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The -20 code gives a 20 mm adjustment window, so the 120 mm extend stroke can be trimmed to anywhere between 100 and 120 mm. 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. Note the 120 mm stroke is a made-to-order length above the 100 mm standard maximum for bore 20.
No, the ACPJ family is discontinued and this exact unit is made to order only. The current-production drop-in is the ACEJ20X120, which swaps the P for an E and matches the same 20 mm bore, 120 mm stroke and force class in the ISO 21287 short-body format. Because the ACP is DIN-standard, confirm the ISO 21287 mounting dimensions before swapping. FA/FB flange and LB foot mountings bolt to the standard face, and the -S magnet on this model works with CMSE / DMSE switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X120-20S
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X120-20S replacement — usually within 7-8 hours.