This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X50-40, 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 ACPJ12X50-40
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X50-40 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 ACEJ12X50-40 (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 → ACEJ12X50-40
- 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 ACPJ12X50-40
The ACPJ12X50-40 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 50 mm stroke by up to 40 mm, giving a usable range of 10-50 mm. 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. Its short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits where a full-length body cannot.
In practice, plan on roughly 34 N of real work at 0.5 MPa (about 60% of the rated push), which lifts about 3 kg vertically - or about 1.5 kg with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers at both ends, and a female M3x0.5 rod thread with M5x0.8 ports. This model is discontinued; the current-production drop-in is the ACEJ12X50 (swap the P for an E), so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-40 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-40 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X50-40 |
| 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 ACEJ12X50-40 (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 ACPJ12X50-40
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -40 | 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 ACPJ12X50-40 Is Used
Small-part ejection from jigs
A 10-50 mm adjustable push ejects machined pins or plastic caps off a jig plate, with 56.5 N at 0.5 MPa enough for parts under about 3 kg of resistance.
Fixture clamping in tight cells
The short body, roughly 50% shorter than an ISO 15552 profile cylinder, clamps circuit boards or brackets inside cramped test fixtures where a full-length body will not fit.
Light pick-and-place lowering
Trims the extend stroke to a 10 mm minimum for lowering small components onto a conveyor stop; the fixed TPU bumper softens contact at both ends.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-40 with the ACEJ12X50-40
Size both ways: if 56.5 N push at 0.5 MPa is marginal, step up to the 16 mm bore (100.5 N push at 0.5 MPa); if the load is a few newtons, the same 12 mm bore in a shorter fixed-stroke ACP may be enough. Note the stop screw only shortens the extend stroke and is not a mid-stroke lock - on air loss the piston still drifts, so add a separate clamp for load holding. FA/FB flange and LB foot mountings bolt to the ISO 21287 face. If you need CMSE or DMSE switches, order the optional -S magnet version; this non-S code has no magnet fitted. Replacement: ACEJ12X50.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X50-40
- ✓ 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 ACPJ12X50-40 FAQ
At 0.5 MPa: 56.5 N push and 42.4 N pull. At 0.7 MPa: 79.2 N push and 59.4 N pull. Theoretical maximum is 11.5 kgf at 1.0 MPa. The -40 code is a 40 mm adjustment window: a stop screw shortens the 50 mm stroke by up to 40 mm, so the extend stroke can be set anywhere from 10 to 50 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, with fixed TPU bumpers at both ends.
No - the ACPJ12X50-40 is discontinued. The current-production drop-in is the ACEJ12X50 (swap the P for an E), an ISO 21287 compact cylinder in the same bore, stroke and force class. Because the ACP is DIN-standard, confirm the ISO 21287 mounting dimensions before swapping. Also note the magnet is only fitted when the optional -S code is ordered; without it no CMSE or DMSE switch can be mounted.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X50-40
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X50-40 replacement — usually within 7-8 hours.