This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X120-20, 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 ACPJ12X120-20
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X120-20 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 ACEJ12X120-20 (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 → ACEJ12X120-20
- 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 ACPJ12X120-20
This is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 120 mm stroke by up to 20 mm, giving a usable range of 100-120 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. Its 120 mm stroke is longer than the 50 mm standard maximum for this bore, so it is a made-to-order build. Note: the ACPJ family is discontinued; the current-production replacement is ACEJ12X120.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits slim slides and tight guards. A fixed TPU bumper sits at both ends and the hard-anodized aluminium body carries an S45C hard-chrome rod with a female M3x0.5 thread. As a rule of thumb, plan on roughly 34 N (about 3.4 kgf) of real work at 0.5 MPa, which lifts about 2.9 kg vertically with a 2:1 margin. No magnet is fitted; order the -S code if you need CMSE / DMSE switch sensing.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-20 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-20 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X120-20 |
| 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 ACEJ12X120-20 (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 (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 ACPJ12X120-20
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | 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 (double rod, adjustable stroke).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-20 Is Used
Small-part ejection from plastic molds
The 100-120 mm adjustable range clears a molded cap or bushing off the core pin, with 56.5 N of push at 0.5 MPa enough for light parts.
Position checking on electronics assembly benches
Order the -S magnet version to add CMSE / DMSE switches and confirm a fixture has reached the set stroke; this base model has no magnet fitted.
Light hold-down of PCBs in a test jig
About 34 N of practical force at 0.5 MPa presses a board onto pogo-pin contacts without stressing components, inside a compact gantry.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X120-20 with the ACEJ12X120-20
At 56.5 N push (0.5 MPa) this 12 mm bore suits light clamping and small part ejection. Step up to the 16 mm bore for 100.5 N or the 20 mm bore for 157.1 N at the same pressure. The adjuster is a mechanical end stop for the extend stroke only - it does not hold a load if air is lost. FA/FB flange and LB foot mountings bolt to the ISO 21287 face, and the -S magnet code enables CMSE / DMSE switches. For new projects, specify ACEJ12X120 and confirm ISO 21287 mounting dimensions before swapping.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X120-20
- ✓ 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 ACPJ12X120-20 FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, air filtered to 40 um, temperature -20 to +70 C. The 120 mm stroke is a non-standard, made-to-order length since the bore 12 standard maximum is 50 mm.
The -20 code sets a 20 mm window: an external stop screw shortens the extend stroke anywhere between 100 and 120 mm, but it cannot lengthen the stroke past 120 mm. The stop is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. The ACPJ is discontinued; the drop-in successor is ACEJ12X120 in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X120-20
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X120-20 replacement — usually within 7-8 hours.