This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X50-50, 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 ACPJ12X50-50
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X50-50 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 ACEJ12X50-50 (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 → ACEJ12X50-50
- 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 ACPJ12X50-50
This is a double acting compact cylinder with an adjustable stroke: air powers both the extend and retract strokes, and an external stop screw trims the 50 mm extend stroke anywhere within the ordered 50 mm window, giving a usable range of 0-50 mm. The 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa (rising to 79.2 N / 59.4 N at 0.7 MPa), so in practice plan on roughly 33.9 N of usable push at 0.5 MPa, which is about 2.9 kg of vertical lift with a 2:1 margin. A fixed TPU bumper sits at both ends, and speed runs 30-500 mm/s.
The hard-anodized aluminium body follows the ISO 21287 short format, saving about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding where a full-length body cannot. Note that this model is discontinued: the current-production drop-in is the ACEJ12X50 (swap the P for an E), same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping, since the ACP was built to a DIN standard. The rod end is female M3x0.5, the port is M5x0.8, and no magnet is fitted unless the optional -S code is ordered.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X50-50 |
| 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 ACEJ12X50-50 (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 ACPJ12X50-50
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -50 | 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 ACPJ12X50-50 Is Used
Small-part ejection from micro molds
The 0-50 mm trim range and 56.5 N push at 0.5 MPa suit nudging finished connectors or caps off a 4-cavity micro mold where space behind the tool is minimal.
Compact pick-and-place on PCB lines
With the optional -S magnet ordered, CMSE or DMSE switches give end-of-stroke signals on SMT transfer heads; the short body fits between conveyor frames.
Sample press in lab automation
About 2.9 kg of practical vertical lift at a 2:1 margin makes this bore a fit for pressing microplate seals or lidding small sample trays in diagnostic equipment.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50 with the ACEJ12X50-50
At 12 mm bore this is the smallest force class in the range: 56.5 N push at 0.5 MPa. If your 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). Keep in mind the stop screw only shortens the extend stroke and does not hold a load - on air loss the piston still drifts, so add a separate clamp or brake where position must be kept. FA/FB flange and LB foot mountings bolt to the standard face. This unit is discontinued; order the ACEJ12X50 as the current equivalent and verify mounting dimensions first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X50-50
- ✓ 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 ACPJ12X50-50 FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa push rises to 79.2 N and pull to 59.4 N. The theoretical maximum is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi), and speed spans 30-500 mm/s.
The hard-anodized aluminium body follows the ISO 21287 short format, cutting mounting length by about 50% versus an ISO 15552 profile cylinder, with a fixed TPU bumper at each end and FA/FB flange or LB foot options. The ACPJ family is discontinued - the ACEJ12X50 is the current drop-in with the same bore, stroke and force class; confirm the ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X50-50
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X50-50 replacement — usually within 7-8 hours.