This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X40-10B, 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 ACPJ12X40-10B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X40-10B 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 ACEJ12X40-10B (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 → ACEJ12X40-10B
- 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 ACPJ12X40-10B
Double acting compact cylinder with an adjustable extend stroke, the ACPJ12X40-10B uses a 12 mm bore and a 40 mm stroke that an external stop screw trims by up to 10 mm, giving a usable range of 30-40 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those rise to 79.2 N and 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The male rod thread (B code) bolts straight to I/Y knuckles, and the M5x0.8 ports suit small pneumatic manifolds.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guard brackets. As a rule of thumb, plan on roughly 34 N of real work at 0.5 MPa (about 0.6 of the push rating), which lifts about 2.9 kg vertically with a 2:1 margin. Note this model is discontinued: the current-production drop-in is the ACEJ12X40, so confirm ISO 21287 mounting dimensions before swapping from the DIN-standard ACP footprint.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-10B |
| 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 ACEJ12X40-10B (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 ACPJ12X40-10B
| 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 ACPJ12X40-10B Is Used
Small-part ejection from plastic molds
The 56.5 N push at 0.5 MPa is enough to kick light molded caps off a die, and the 30-40 mm trimmed stroke keeps the ejector clear of the tool during close.
Presence check on electronics assembly lines
A 12 mm bore slide confirms a PCB or connector is seated; with the optional -S magnet, CMSE or DMSE switches report the end positions to the PLC.
Carton flap tuck on a packaging bench
About 2.9 kg of vertical lift capability with a 2:1 margin lets the male-thread rod fold lightweight flaps on small cartons at 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-10B with the ACEJ12X40-10B
At 56.5 N push at 0.5 MPa, this 12 mm bore suits light clamping and part-presenting; step up to the 16 mm bore (100.5 N push at 0.5 MPa) for roughly double the force, or down only if your load is under about 30 N. The 10 mm adjustment window shortens the extend stroke only - it is a mechanical end stop, not a mid-stroke lock, so the rod still drifts on air loss. Male rod thread (B) and FA/LB mounting cover most fixture needs; add the -S code if you later want the optional magnet for CMSE / DMSE switches, since this non-S version carries no magnet. For new builds, order the ACEJ12X40 instead - this ACPJ model is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-10B
- ✓ 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 ACPJ12X40-10B 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 pressure is 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi), and speed runs 30-500 mm/s. The 10 mm adjustment window trims the 40 mm extend stroke to any length from 30 to 40 mm.
It is a short-body compact cylinder with a hard-anodized aluminium body, S45C hard-chrome rod, M5x0.8 ports, a 6 mm male rod thread and fixed TPU bumpers at both ends - about 50% shorter in mounting length than an ISO 15552 profile cylinder. This model is discontinued; the current drop-in is the ACEJ12X40 (same bore, stroke and force class). Confirm the ISO 21287 mounting dimensions before swapping, and order the -S code on the replacement if you need the optional magnet for CMSE / DMSE switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X40-10B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X40-10B replacement — usually within 7-8 hours.