This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X120-30, the same code under the new prefix. 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 ACPJ12X120-30
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X120-30 is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm 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 ACEJ12X120-30 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke120 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X120-30
- 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 ACPJ12X120-30
This compact cylinder is double acting, so air drives the rod out and pulls it back, and the -30 code adds a 30 mm adjustment window: a stop screw trims the 120 mm extend stroke down to 90 mm on site. The 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. Note the 120 mm stroke exceeds the 50 mm standard limit for bore 12, 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 slim fixtures and gantries. For real-world sizing, plan on roughly 34 N (about 60% of rated push) of usable work at 0.5 MPa, enough to lift about 2.8 kg vertically with a 2:1 margin. This ACPJ model is discontinued; the current-production replacement is ACEJ12X120, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X120-30 |
| Bore size | Ø12 mm |
| Stroke | 120 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| 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 50 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ12X120-30 (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 (Ø12mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 kgf |
ACPJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
Model Code: Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×120 | Stroke length in mm. |
| -30 | 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 (double rod, adjustable stroke).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30 Is Used
Small-part ejection in assembly fixtures
The 56.5 N push at 0.5 MPa clears lightweight plastic or stamped parts off a jig, and the 30 mm adjustment window lets a technician dial the extend stroke between 90 and 120 mm without changing the cylinder.
Lab and test-rig actuation
A 2.8 kg vertical lift capability with margin suits raising small probe heads or sample trays, while the compact short body fits benchtop rigs where a full-length profile cylinder will not.
Light gating on packaging lines
Used as a stop or deflector for small cartons on a conveyor, the 42.4 N pull force retracts the gate reliably, and the fixed TPU bumper at both ends decelerates the rod at each end of travel.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-30 with the ACEJ12X120-30
At 12 mm bore this is the smallest force class in the family: 56.5 N push at 0.5 MPa versus 100.5 N for bore 16 and 157.1 N for bore 20. Step up if your load needs more than about 34 N of working force. The 120 mm stroke is non-standard for this bore (max standard 50 mm), so expect a made-to-order unit. FA/FB flange and LB foot mounts bolt to the standard face, and the rod end is female M3x0.5 with M5x0.8 ports. No magnet is fitted here; order the -S code if you later need CMSE / DMSE switch position feedback. For new projects, specify the ACEJ12X120 instead.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X120-30
- ✓ 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 ACPJ12X120-30 FAQ
At 0.5 MPa the 12 mm bore gives 56.5 N push and 42.4 N pull; at 0.7 MPa it gives 79.2 N push and 59.4 N pull, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -30 code is a 30 mm adjustment window: a stop screw shortens the 120 mm extend stroke to as little as 90 mm. It is a mechanical end stop only, not a mid-stroke lock, so the piston still drifts if air is lost. The 120 mm stroke is a made-to-order length since the bore 12 standard maximum is 50 mm.
No, the ACPJ family is discontinued. The current-production drop-in is ACEJ12X120, which matches the same bore, stroke and force class in the ISO 21287 short-body format. Because the ACP was built to a DIN standard, confirm the ISO 21287 mounting dimensions before swapping. Also note this unit has no magnet fitted; position sensing with CMSE / DMSE switches requires ordering the optional -S magnet code.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X120-30
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X120-30 replacement — usually within 7-8 hours.