This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X120-50B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X120-50B 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 ACPJ20X120-50B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50B 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 ACEJ20X120-50B (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 → ACEJ20X120-50B
- 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 ACPJ20X120-50B
Double acting and adjustable in stroke, the ACPJ20X120-50B is a discontinued DIN-standard compact cylinder with a 20 mm bore, a 120 mm made-to-order stroke and a male rod thread (B code). At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those figures rise to 219.9 N and 164.9 N, with a theoretical 32 kgf at 1.0 MPa. The -50 code gives a 50 mm adjustment window, so a stop screw trims the extend stroke anywhere in a 70-120 mm range. Air supply is 0.15-1.0 MPa (22-145 psi) and speed runs 30-500 mm/s.
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 cramped jigs and gantries. Practical sizing: 0.6 of the push force leaves about 94 N for real work, so the rod lifts roughly 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 port is M5x0.8. This model is discontinued; the current-production drop-in is the ACEJ20X120 - confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X120-50B |
| 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 ACEJ20X120-50B (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 ACEJ20X120-50B 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 ACPJ20X120-50B
| 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 ACPJ20X120-50B Is Used
Injection-mould gate trimming
The 70-120 mm adjustable window lets a moulder dial the extend stroke to clear a sprue picker arm, using about 94 N of usable push at 0.5 MPa to seat small inserts.
Carton flap tucking head
A packaging line tucks top flaps on 150 mm cartons; the 120 mm stroke with a 50 mm trim range matches flap depth, and the short body fits under a low guard frame.
Lab sample press fixture
A diagnostic-kit line presses reagent caps with about 8 kg vertical lift capacity at a 2:1 margin; the male rod thread (B) takes a custom pressing tip directly.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-50B with the ACEJ20X120-50B
Size against neighbours: bore 16 delivers 100.5 N push at 0.5 MPa, while bore 20 gives 157.1 N - step up only if your fixture needs the extra 57 N. Remember the adjuster is a mechanical end stop for the extend stroke, not a mid-stroke lock, so the piston still drifts on air loss and needs a separate valve or brake for holding. FA/FB flanges and LB feet bolt to the ISO 21287 face, and if you need position sensing, order the -S variant with the optional magnet for CMSE / DMSE switches - this B-code model has no magnet fitted. For new builds, specify the ACEJ20X120 instead.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X120-50B
- ✓ 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 ACPJ20X120-50B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa, 219.9 N push and 164.9 N pull; theoretical maximum is 32 kgf at 1.0 MPa. The -50 code is a 50 mm window: a stop screw shortens the 120 mm extend stroke down to 70 mm on site. The 120 mm stroke is above the 100 mm standard maximum for bore 20, so it is made to order. Operating range is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, port M5x0.8, rod 10 mm with male thread.
It is a short-body compact cylinder in the ISO 21287 class, saving about 50% of the mounting length of an ISO 15552 profile cylinder, with a hard-anodized aluminium body, S45C hard-chrome rod and fixed TPU bumpers at both ends. The ACPJ family is discontinued; the current-production replacement is the ACEJ20X120 (swap the P for an E), which matches the same bore, stroke and force class - confirm ISO 21287 mounting dimensions before the swap.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X120-50B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X120-50B replacement — usually within 7-8 hours.