This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X50-30B, 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 ACPJ12X50-30B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X50-30B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 50mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X50-30B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X50-30B
- 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 ACPJ12X50-30B
This discontinued AirTAC model is a double acting compact cylinder with an adjustable extend stroke. The -30 code sets a 30 mm adjustment window, so the stop screw trims the 50 mm stroke anywhere down to 20 mm on site. At 0.5 MPa the 12 mm bore delivers 56.5 N push and 42.4 N pull, rising to 79.2 N push at 0.7 MPa, with a theoretical maximum of 11.5 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 fits cramped jigs and guarding where a full-length body cannot.
Practical sizing: plan for about 34 N of real work at 0.5 MPa (roughly 0.6 of the rated push), which lifts about 3 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers at both ends and a male rod thread (B code) on the 6 mm rod. No magnet is fitted on this version, so CMSE or DMSE switches cannot be used unless you order the -S variant. Production has ended; the current drop-in is the ACEJ12X50, so confirm ISO 21287 mounting dimensions before swapping, since the ACP series was built to a DIN-standard footprint.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-30B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-30B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X50-30B |
| Bore size | Ø12 mm |
| Stroke | 50 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 ACEJ12X50-30B (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 ACPJ12X50-30B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 ACPJ12X50-30B Is Used
Small-part ejection in plastic molding
The 20-50 mm adjustable range nudges finished clips or bushings off a mold table, with 56.5 N push at 0.5 MPa enough for lightweight parts.
Clamp position setup on test benches
The 30 mm stop window lets a technician dial in the exact extend position of a light hold-down on an electronics test fixture without changing hardware.
Reject pusher on a compact conveyor
Mounted in the tight frame of a small conveyor line, the short body deflects off-spec vials or caps weighing up to about 3 kg vertically.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-30B with the ACEJ12X50-30B
At 12 mm bore you are at the bottom of the ACPJ range: 56.5 N push at 0.5 MPa. If the load needs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa) or the 20 mm bore (157.1 N). The 30 mm window suits fixtures where the final position is tuned after installation; remember the stop screw only shortens the extend stroke and does not hold a load if air is lost. Mounting is FA/FB flange or LB foot, with PT ports (M5x0.8). For new designs, order the ACEJ12X50 instead, as this model is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X50-30B
- ✓ 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 ACPJ12X50-30B 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, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The bore is 12 mm with a 6 mm male-thread rod, M5x0.8 port, operating pressure 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, and a 30 mm adjustment window on the 50 mm stroke.
Only if the optional -S magnet is ordered; this version has no magnet, so CMSE or DMSE switches cannot be read. The ACPJ family is discontinued, and the current-production replacement is the ACEJ12X50 in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X50-30B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X50-30B replacement — usually within 7-8 hours.