This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X120-75B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X120-75B 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 ACPJ20X120-75B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-75B 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 ACEJ20X120-75B (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 → ACEJ20X120-75B
- 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 ACPJ20X120-75B
The ACPJ20X120-75B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 120 mm stroke anywhere within a 75 mm window, giving a usable range of 45-120 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, and the 10 mm male-threaded rod (B code) bolts straight into standard knuckles. Note that the 120 mm stroke exceeds the 100 mm standard maximum for bore 20, 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 matters in tight gantries and guarding. In practice, plan for roughly 94 N (about 9.6 kg of vertical lift at a 2:1 margin) of real work at 0.5 MPa rather than the full 157.1 N rating. This model is discontinued; the current-production drop-in is the ACEJ20X120, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-75B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-75B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X120-75B |
| 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 ACEJ20X120-75B (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 ACEJ20X120-75B 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 ACPJ20X120-75B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | Stroke length in mm. |
| -75 | 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 ACPJ20X120-75B Is Used
Fixture clamping on CNC jigs
The 45-120 mm adjustable range lets a machinist trim the clamp stroke per fixture, with 157.1 N push at 0.5 MPa holding aluminum workpieces during drilling.
Small-parts ejection from packaging lines
A 120 mm stroke kicks cartons or blisters off a conveyor, and the compact body fits where a full-length profile cylinder will not clear the frame.
Sample press in lab automation
The 10 mm male rod thread drives a pressing plate for vial capping or sample prep, with the TPU bumper decelerating each end at up to 500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X120-75B with the ACEJ20X120-75B
At bore 20 the 157.1 N push at 0.5 MPa sits between the 16 mm bore (100.5 N) and the next size up in the range, so size down if force allows and up if your load needs more margin. The 75 mm window suits fixtures where the stroke is finalized on site; remember the stop only shortens the extend stroke and drifts on air loss, so it is not a load-holding device. This unit has no magnet (no S code), so no CMSE or DMSE switch can be fitted; order an -S variant if sensing is needed. FA/FB flange and LB foot mountings match the ISO 21287 face. For new projects, specify the ACEJ20X120 instead.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X120-75B
- ✓ 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 ACPJ20X120-75B 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 -75 code means the 120 mm extend stroke can be trimmed by up to 75 mm, so the usable range is 45-120 mm. The 120 mm stroke is made to order because the bore 20 standard maximum is 100 mm.
It is a compact short-body cylinder with a hard-anodized aluminium body, S45C hard-chrome rod, fixed TPU bumpers at both ends and M5x08 ports; the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder. FA/FB flange and LB foot mountings fit the standard face. The ACPJ family is discontinued; the current drop-in is the ACEJ20X120, so confirm ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ20X120-75B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ20X120-75B replacement — usually within 7-8 hours.