This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X40-10S, 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 ACPJ12X40-10S
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X40-10S 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 ACEJ12X40-10S (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 → ACEJ12X40-10S
- 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 ACPJ12X40-10S
This compact cylinder works double acting: air extends and retracts the 6 mm rod, and a stop screw trims the 40 mm extend stroke anywhere within the ordered 10 mm window, giving a usable 30-40 mm range. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N at 0.7 MPa. The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarding where a full-length body cannot. A fixed TPU bumper sits at both ends.
Note this model is DISCONTINUED; the current-production drop-in is ACEJ12X40, which matches the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping, since the ACP was DIN-standard. Because this unit carries the optional -S magnet, CMSE or DMSE reed and solid-state switches can be mounted directly on the body. For sizing, treat about 34 N (roughly 0.6 of the push rating) as the practical working force at 0.5 MPa, and expect it to lift about 2.9 kg vertically with a 2:1 margin. Operating range is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, port M5x0.8, female rod thread M3x0.5.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-10S |
| 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 ACEJ12X40-10S (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 ACPJ12X40-10S
| 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 ACPJ12X40-10S Is Used
Reject gate on a packaging line
The 40 mm stroke with a 10 mm trim window lets the technician dial the push-off travel to 30-40 mm for nudging off-spec cartons, while the fitted magnet drives a CMSE switch to confirm gate position.
Small-part ejection from a jig
With 56.5 N push at 0.5 MPa and a 6 mm rod, the cylinder ejects light machined pins or moulded caps from nests where a longer body would not fit beside the fixture.
Clamping of thin sheet in a welding cell
About 34 N of practical working force at 0.5 MPa is enough to hold 1-2 mm sheet against a stop; the short body mounts inside tight weld-tooling frames.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10S with the ACEJ12X40-10S
At 12 mm bore this is the lightest ACPJ force class: 56.5 N push at 0.5 MPa. Step up to the 16 mm bore for 100.5 N, or down is not available since 12 mm is the smallest. The -10 adjuster shortens the extend stroke by up to 10 mm on site; it is a mechanical end stop only, so on air loss the piston still drifts and it must not be relied on to hold a load. FA/FB flange and LB foot mountings bolt to the standard face. If you need position feedback, this -S version already carries the magnet for CMSE / DMSE switches. For new projects, order the ACEJ12X40 instead - this model is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-10S
- ✓ 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 ACPJ12X40-10S FAQ
It is a double acting adjustable-stroke cylinder: push 56.5 N and pull 42.4 N at 0.5 MPa, push 79.2 N and pull 59.4 N at 0.7 MPa, with a theoretical maximum of 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 -10 code gives a 10 mm adjustment window on the 40 mm stroke.
An external stop screw shortens the extend stroke by up to 10 mm, so the usable extend range is 30-40 mm; it cannot lengthen the stroke past 40 mm, and it is an end stop rather than a mid-stroke lock, so the piston still drifts if air is lost. Because this model carries the optional -S magnet, CMSE and DMSE reed or solid-state switches can be clamped directly to the body. The unit is discontinued - the current drop-in is ACEJ12X40, so confirm ISO 21287 mounting dimensions before ordering.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X40-10S
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X40-10S replacement — usually within 7-8 hours.