This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X120-50SB — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X120-50SB 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 ACPJ20X120-50SB
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50SB 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 ACEJ20X120-50SB (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 → ACEJ20X120-50SB
- 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 ACPJ20X120-50SB
This ACPJ20X120-50SB is a double acting compact cylinder with an adjustable stroke, and it is discontinued - the current-production replacement is the ACEJ20X120. Air drives the rod in both directions, and the -50 code gives a 50 mm adjustment window: a stop screw trims the 120 mm extend stroke down to 70 mm on site, so one cylinder covers a 70-120 mm working range. At 0.5 MPa the 20 mm bore pushes 157.1 N and pulls 117.8 N; at 0.7 MPa that rises to 219.9 N push. Because roughly 60% of the push force is a realistic working figure, plan for about 94 N of real work - which lifts about 9.6 kg vertically, or roughly 4.8 kg with a 2:1 margin.
The 120 mm stroke exceeds the 100 mm maximum standard stroke for the 20 mm bore, so this is a made-to-order build. 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 guarded stations. This -S version carries the optional magnet, so CMSE or DMSE reed or solid-state switches can be clamped on for end-of-stroke signals, and the B code gives a male 10 mm rod thread. Fixed TPU bumpers sit at both ends, speed runs 30-500 mm/s, and pressure spans 0.15-1.0 MPa (22-145 psi). Before swapping in the ACEJ20X120, confirm the ISO 21287 mounting dimensions, since the ACP series is DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X120-50SB |
| 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 ACEJ20X120-50SB (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 ACEJ20X120-50SB 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 ACPJ20X120-50SB
| 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 ACPJ20X120-50SB Is Used
Ejector on a small assembly press
The 219.9 N push at 0.7 MPa is enough to eject finished bushings from a light stamping die, and the 50 mm window lets one cylinder serve dies with 70-120 mm ejection travel.
Packaging line pusher gate
At 30-500 mm/s the rod can divert cartons on a conveyor between lanes, with the stop screw set precisely to the lane pitch and CMSE switches confirming each position.
Sample lift in a lab automation module
The bore lifts about 9.6 kg vertically at 0.5 MPa, or roughly 4.8 kg with a 2:1 margin - well matched to raising sample trays inside a compact analyzer housing.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50SB with the ACEJ20X120-50SB
Size the bore both ways: if 157.1 N at 0.5 MPa is more than the job needs, the 16 mm bore delivers 100.5 N push and 75.4 N pull; if the load needs more, step up to the 25 mm class. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock - on air loss the piston still drifts, so do not rely on it to hold a load. Match FA/FB flange or LB foot mounts and I/Y rod knuckles to the ISO 21287 face. If position sensing matters, this -S model already carries the magnet for CMSE / DMSE switches; order plain versions without the S code only when no sensing is needed. For new designs, specify the ACEJ20X120 instead and verify the mounting footprint.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X120-50SB
- ✓ 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 ACPJ20X120-50SB FAQ
Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push is 219.9 N and pull 164.9 N, with a theoretical maximum of 32 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, and the port is M5x0.8. The 120 mm stroke is non-standard for this bore and made to order, and the model is discontinued - the ACEJ20X120 is the current replacement.
The -50 code sets a 50 mm adjustment window: a stop screw shortens the 120 mm extend stroke to any length from 70 mm upward, though it cannot lengthen the stroke past 120 mm. The stop is a mechanical end stop, not a load-holding brake. The S code means this unit carries the optional magnet, so CMSE or DMSE reed or solid-state switches can be mounted for position signals. Fixed TPU bumpers decelerate the piston at both ends, and the male rod thread suits I/Y knuckles on the ISO 21287 mounting face.
Related AirTAC ACE Cylinders
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