This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ20X20-20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ20X20-20 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 ACPJ20X20-20
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ20X20-20 is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø20mm bore and 20mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ20X20-20 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ20 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- StatusDiscontinued → ACEJ20X20-20
- 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 ACPJ20X20-20
The ACPJ20X20-20 is a double acting compact cylinder with an adjustable extend stroke: the -20 code gives a 20 mm trim window, so a stop screw shortens the 20 mm stroke on site anywhere from 0 to 20 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N and 164.9 N, with a theoretical 32 kgf at 1.0 MPa. 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 guarding where a full-length body will not fit.
Practical sizing: plan on about 94 N of usable push force at 0.5 MPa (roughly 60% of the rating), which lifts about 9 kg vertically - halve that to about 5 kg for a 2:1 margin on real part weights. The hard-anodized aluminium body carries an S45C hard-chrome rod, a fixed TPU bumper sits at both ends, and speed runs 30-500 mm/s at 0.15-1.0 MPa (22-145 psi). Note this model is discontinued; the current-production replacement is the ACEJ20X20, and you should confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ20X20-20 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ20X20-20 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ20X20-20 |
| Bore size | Ø20 mm |
| Stroke | 20 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 ACEJ20X20-20 (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 ACEJ20X20-20 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 ACPJ20X20-20
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 20 | Bore size in mm. |
| ×20 | 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 ACPJ20X20-20 Is Used
Fixture clamping on CNC jigs
The 20 mm trim window lets a machinist dial the clamp stroke from 0 to 20 mm per fixture, with 157.1 N push at 0.5 MPa holding small aluminum parts during drilling.
Product ejection off packaging lines
A 20 mm kick is enough to push cartons sideways off a belt; the short body mounts between guard rails where an ISO 15552 profile cylinder would overhang.
Sample press in lab automation
Compact 20 mm bore delivers about 9 kg of vertical press force at 0.5 MPa for capping or pressing microplate lids inside tight instrument enclosures.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ20X20-20 with the ACEJ20X20-20
At 20 mm bore this sits in the mid-compact class: the 12 mm bore offers 56.5 N push at 0.5 MPa for lighter pick-and-place, while the 25 mm class steps up for heavier clamping - here you get 157.1 N push and 117.8 N pull at 0.5 MPa. The rod end is female M6x1.0 and the port is M5x0.8. If you need position feedback, order the -S variant, because this code has no magnet and no sensor can be mounted without it; with -S, CMSE / DMSE switches work directly. FA/FB flange and LB foot mountings bolt to the standard face. The stop screw trims the extend stroke only - it is not a mid-stroke lock, so on air loss the piston still drifts. This model is discontinued; the drop-in successor is the ACEJ20X20.
Replacement checklist
- ✓ Current-production ACE → ACEJ20X20-20
- ✓ 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 ACPJ20X20-20 FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N and pull is 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The -20 code sets a 20 mm adjustment window: an external stop screw shortens the 20 mm extend stroke anywhere from 0 to 20 mm on site. It cannot lengthen the stroke past the ordered 20 mm, and the stop is not a load-holding brake - on air loss the piston drifts. Operating range is 0.15-1.0 MPa (22-145 psi) at 30-500 mm/s.
No - the ACPJ family is discontinued. The current-production replacement is the ACEJ20X20, which matches the same bore, stroke and force class; confirm the ISO 21287 mounting dimensions before swapping since the ACP is DIN-standard. This code has no magnet, so no switch can be fitted; the optional -S magnet enables CMSE / DMSE reed or solid-state switches. Mounting uses FA/FB flanges or an LB foot on the standard face, and the body is hard-anodized aluminium with a fixed TPU bumper at each end.
Related AirTAC ACE Cylinders
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