This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X120-50 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X120-50 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 ACPJ20X120-50
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50 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 ACEJ20X120-50 (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 → ACEJ20X120-50
- 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 ACPJ20X120-50
The ACPJ20X120-50 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 120 mm stroke by up to 50 mm, giving a usable range of 70-120 mm on site. At the 20 mm bore it pushes 157.1 N and pulls 117.8 N at 0.5 MPa, rising to 219.9 N at 0.7 MPa, with a theoretical peak of 32 kgf at 1.0 MPa. The 120 mm stroke is longer than the 100 mm standard for this bore, so it is a made-to-order build. This model is discontinued; the current-production replacement is the ACEJ20X120.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding. A rule of thumb: plan on about 94 N of real work at 0.5 MPa (roughly 60% of the rated push), which lifts about 8 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers sit at both ends, and the rod end is female M6x1.0 with M5x0.8 ports. No magnet is fitted on this code; the optional -S version adds one for CMSE / DMSE switches.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X120-50 |
| 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 ACEJ20X120-50 (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 (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 ACEJ20X120-50 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 ACPJ20X120-50
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | 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 ACPJ20X120-50 Is Used
Fixture clamp with trimmed stroke
On a CNC jig the 50 mm window lets the setter dial the extend stroke between 70 and 120 mm so the 157.1 N push seats a machined housing without bottoming hard.
Carton push-off on a packing line
The 120 mm stroke nudges a folded carton off a conveyor lane at 30-500 mm/s, and the compact body fits where a full-length profile cylinder would overhang the frame.
Light vertical lift in a test rig
With about 8 kg of vertical lift capacity at a 2:1 margin, the cylinder raises a sensor head or weight stack in a small laboratory press fixture.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50 with the ACEJ20X120-50
At 157.1 N push (0.5 MPa) this 20 mm bore suits light clamping and part-presenting; step down to a 16 mm bore (100.5 N push) for lighter loads or up to a larger bore for more force. Remember the -50 stop only shortens the extend stroke and drifts on air loss, so it is not a load lock. FA/FB flange or LB foot mounts bolt to the ISO 21287 face, and the optional -S magnet enables CMSE / DMSE sensing. Order the ACEJ20X120 instead: it is the current drop-in, but confirm ISO 21287 mounting dimensions before swapping.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X120-50
- ✓ 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 ACPJ20X120-50 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; theoretical maximum is 32 kgf at 1.0 MPa. The -50 code gives a 50 mm adjustment window, so the 120 mm extend stroke can be trimmed anywhere down to 70 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and the 120 mm stroke is a made-to-order length because the bore's standard maximum is 100 mm.
It is a short-body compact cylinder in the ISO 21287 class with a hard-anodized aluminium body, S45C hard-chrome rod, M5x0.8 ports, female M6x1.0 rod thread and fixed TPU bumpers at both ends; the body saves about 50% of the mounting length of an ISO 15552 profile cylinder. This ACPJ is discontinued - order the ACEJ20X120, the current drop-in in the same bore, stroke and force class, and confirm ISO 21287 mounting dimensions before the swap. Sensing needs the optional -S magnet with CMSE / DMSE switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X120-50
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X120-50 replacement — usually within 7-8 hours.