This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X40-10, 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 ACPJ12X40-10
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X40-10 is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 40mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X40-10 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X40-10
- 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 ACPJ12X40-10
The ACPJ12X40-10 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 40 mm stroke by up to 10 mm, giving a usable range of 30-40 mm on site. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N push at 0.7 MPa, with a theoretical maximum of 11.5 kgf at 1.0 MPa. Its hard-anodized aluminium body is an ISO 21287 short build that saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding.
Practical sizing: plan on roughly 34 N of real work at 0.5 MPa (about 0.6 of the rated push), which vertically lifts about 3 kg with a 2:1 margin. The rod end is female M3x0.5 and the port is M5x0.8, fixed TPU bumpers sit at both ends, and speed spans 30-500 mm/s. Note this model is discontinued; the current-production drop-in is the ACEJ12X40, so confirm ISO 21287 mounting dimensions before swapping since the ACP was DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-10 |
| Bore size | Ø12 mm |
| Stroke | 40 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 ACEJ12X40-10 (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 ACPJ12X40-10
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -10 | 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 ACPJ12X40-10 Is Used
Micro jig clamping
The 56.5 N push at 0.5 MPa and the 30-40 mm trimmed stroke suit clamping small brackets or PCB fixtures on compact machining tables where full-length cylinders will not fit.
Light part ejection
With the optional -S magnet and CMSE switches, the 42.4 N pull force ejects or diverts small components from an assembly conveyor lane at up to 500 mm/s.
Lab dosing slide
The short ISO 21287 body and M5x0.8 port drive a small dosing or sample slide in analytical equipment, lifting about 3 kg vertically with a 2:1 margin.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10 with the ACEJ12X40-10
At 12 mm bore this is the lightest ACPJ size: 56.5 N push at 0.5 MPa versus 100.5 N for the 16 mm bore and 157.1 N for the 20 mm, so step up a bore if your part mass or friction load exceeds about 34 N of working force. The -10 window only shortens the extend stroke within 30-40 mm and acts as an end stop, not a mid-stroke lock, so the piston still drifts if air is lost. FA/FB flange and LB foot mountings bolt to the ISO 21287 face, and position sensing needs the optional -S magnet code with CMSE / DMSE switches. This unit is discontinued; order the ACEJ12X40 as the current replacement.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-10
- ✓ 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 ACPJ12X40-10 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. The theoretical maximum is 11.5 kgf at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, air filtered to 40 um, and speed of 30-500 mm/s.
The -10 code is a 10 mm adjustment window: an external stop screw shortens the 40 mm extend stroke to as little as 30 mm. The stop is a mechanical end stop, not a load-holding brake. The ACPJ family is discontinued; the ACEJ12X40 (swap P for E) is the current ISO 21287 drop-in in the same bore, stroke and force class - confirm its mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X40-10
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X40-10 replacement — usually within 7-8 hours.