This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X120-20B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X120-20B 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 ACPJ20X120-20B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20B 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 ACEJ20X120-20B (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 → ACEJ20X120-20B
- 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 ACPJ20X120-20B
This AirTAC cylinder works double acting: air drives the rod out and pulls it back, with a 20 mm bore delivering 157.1 N of push and 117.8 N of pull at 0.5 MPa (219.9 N push at 0.7 MPa). The -20 code gives a 20 mm adjustment window, so a stop screw trims the extend stroke anywhere in a 100-120 mm range on site. Note the 120 mm stroke is above the 100 mm standard limit for bore 20, so this unit is made to order. The ACPJ family is discontinued; the current-production drop-in is ACEJ20X120.
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 jigs and gantries. A hard-anodized aluminium body carries an S45C hard-chrome rod, with fixed TPU bumpers at both ends and a male rod thread from the B code. For sizing: at 0.5 MPa the push force supports about 94 N of real work once you keep a margin, which translates to lifting roughly 8 kg vertically. Running spec: 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, air filtered to 40 um. No magnet is fitted on this version, so no CMSE or DMSE switch can be read unless the optional -S magnet is ordered.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X120-20B |
| 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 ACEJ20X120-20B (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 ACEJ20X120-20B 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 ACPJ20X120-20B
| 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 ACPJ20X120-20B Is Used
Small-parts press fitting
The 157.1 N push at 0.5 MPa seats bearings or dowels into aluminium housings on an electronics assembly bench, with the stop screw trimming the extend stroke between 100 and 120 mm to match part height.
Carton flap tuck-down
On a packaging line the male rod thread drives a flap-tuck paddle; the 20 mm adjustment window lets an operator dial the stroke to the carton size without re-piping, and the TPU bumpers quiet the ends.
Lab sample indexing
A sample-handling fixture uses the 100-120 mm adjustable extend range to push trays onto a rail; the compact short body fits where a full-length profile cylinder would not clear the guard.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-20B with the ACEJ20X120-20B
At 20 mm bore this sits above the 16 mm size (100.5 N push at 0.5 MPa) and below the 25 mm class if you need more than 157.1 N of push. The stop screw shortens the extend stroke only - it never lengthens it past 120 mm - and it is a mechanical end stop, not a mid-stroke lock, so the piston still drifts if air is lost. FA/FB flange and LB foot mountings bolt to the standard face. If you need position sensing, order the -S variant to enable CMSE / DMSE switches. For new builds, specify ACEJ20X120 instead and confirm the ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X120-20B
- ✓ 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 ACPJ20X120-20B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa that rises to 219.9 N push and 164.9 N pull, with a theoretical maximum of 32 kgf at 1.0 MPa. The -20 code gives a 20 mm adjustment window, so the extend stroke can be trimmed anywhere between 100 and 120 mm with the stop screw. The 120 mm stroke is a made-to-order length because the bore 20 standard limit is 100 mm. Port is M5x0.8 and the rod end is male thread.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, and FA/FB flange or LB foot mountings bolt straight to the standard face. Sensors are not possible on this version as ordered: no magnet is fitted without the optional -S code, so order ACPJ20X120-20BS if you need CMSE or DMSE switches. This model is discontinued - the current replacement is ACEJ20X120, and you should confirm the ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X120-20B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X120-20B replacement — usually within 7-8 hours.