This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X35-40, 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 ACPJ12X35-40
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X35-40 is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 35mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X35-40 (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke35 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X35-40
- 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 ACPJ12X35-40
The ACPJ12X35-40 is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 35 mm stroke on site within the 40 mm window, giving a usable range of 0-35 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N push at 0.7 MPa. As a rule of thumb, plan on about 34 N of real work at 0.5 MPa, which is roughly 2.8 kg lifted vertically with a 2:1 margin. The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim jigs and fixtures.
This model is discontinued. The current-production drop-in is the ACEJ12X35 (swap the P for an E) in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers at both ends, an M5x0.8 port and a female M3x0.5 rod thread. No magnet is fitted on this version, so position switches cannot be mounted; order the optional -S magnet code if CMSE / DMSE sensing is needed.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-40 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-40 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X35-40 |
| Bore size | Ø12 mm |
| Stroke | 35 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 ACEJ12X35-40 (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 ACPJ12X35-40
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×35 | 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 ACPJ12X35-40 Is Used
Small-part ejection on assembly benches
Trims the extend stroke to exactly 0-35 mm via the 40 mm window to push finished micro components off a fixture, with 56.5 N push at 0.5 MPa suiting light plastic or stamped parts.
Sensor-ready indexing in test rigs
Order the optional -S magnet to add CMSE / DMSE switches for end-position confirmation on a compact electronics test station where a full-length cylinder will not fit.
Light clamping of PCB fixtures
About 34 N of usable force at 0.5 MPa holds small circuit boards or covers during a screwdriving or gluing step, with the fixed TPU bumper softening end-of-stroke contact.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-40 with the ACEJ12X35-40
At 12 mm bore this is the smallest force class in the range: 56.5 N push at 0.5 MPa. Step up to the 16 mm bore (100.5 N push at 0.5 MPa) if the load is heavier, or stay here for light clamping and indexing. The adjuster is a mechanical end stop for the extend stroke only - on air loss the piston still drifts, so it is not a load-holding brake. Mounting is FA/FB flange or LB foot; the optional -S magnet enables CMSE / DMSE switches. For new designs, specify the ACEJ12X35 instead.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X35-40
- ✓ 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 ACPJ12X35-40 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), proof pressure 1.5 MPa (215 psi), and speed 30-500 mm/s with air filtered to 40 um.
The -40 code is a 40 mm adjustment window: an external stop screw shortens the 35 mm extend stroke on site, so the usable range is 0-35 mm; it cannot lengthen the stroke past 35 mm. The model is discontinued - the current drop-in is the ACEJ12X35, same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X35-40
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X35-40 replacement — usually within 7-8 hours.