This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X35-40B, 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 ACPJ12X35-40B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X35-40B 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 ACEJ12X35-40B (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 → ACEJ12X35-40B
- 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 ACPJ12X35-40B
The ACPJ12X35-40B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 35 mm stroke by up to 40 mm, giving a usable range of 0-35 mm on site. 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. Because the short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, it slots into slim fixtures, small guarding and tight gantries where a full-length body simply will not fit.
For sizing, treat about 34 N (0.6 x the 56.5 N push) as the realistic working force at 0.5 MPa, which corresponds to lifting roughly 2.8 kg vertically with a 2:1 margin. The rod end is male thread (the B code), the port is M5x0.8, and a fixed TPU bumper decelerates the piston at each end. Note that no magnet is fitted on this version - the optional -S code is what enables CMSE / DMSE switch sensing. This model is discontinued; the current-production drop-in is the ACEJ12X35, so confirm ISO 21287 mounting dimensions before swapping.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-40B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-40B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X35-40B |
| 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 ACEJ12X35-40B (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 ACPJ12X35-40B
| 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 ACPJ12X35-40B Is Used
Micro part ejection from small molds
The 56.5 N push at 0.5 MPa is enough to strip tiny plastic or stamped parts off a small mold or nest, and the 0-35 mm adjustable range lets the operator set the exact eject depth on the machine.
Compact gating on electronics assembly lines
A short-body stop gate for PCB carriers: the trimmed extend stroke sets gate travel precisely, and ordering the -S version adds the magnet so CMSE / DMSE switches confirm gate closed.
Sample press in lab automation
With about 34 N of practical working force and a male-thread rod for quick tooling attachment, this bore class suits light sample pressing or vial capping stations inside compact instrument enclosures.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X35-40B with the ACEJ12X35-40B
At 12 mm bore this is the lightest force class: 56.5 N push at 0.5 MPa. Step up to the 16 mm bore for 100.5 N push, or down only if you need less than 34 N of usable force. The 40 mm adjustment window suits stations where the final extend position is tuned during commissioning; remember the stop screw shortens the stroke and does not hold a load if air is lost. Mounting uses the FA/FB flange or LB foot family, and the male rod thread (B) pairs with I/Y knuckles. Since the ACPJ12X35-40B is discontinued, order the ACEJ12X35 as the current replacement and verify the ISO 21287 footprint first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X35-40B
- ✓ 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 ACPJ12X35-40B 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. In practice plan on about 34 N of usable push at 0.5 MPa (0.6 of the rating), which lifts roughly 2.8 kg vertically with a 2:1 safety margin. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and the port is M5x0.8.
The -40 code is a 40 mm adjustment window: an external stop screw shortens the 35 mm extend stroke anywhere within that window, giving a 0-35 mm usable range. The stop is a mechanical end stop only - it never holds a load if air pressure is lost. The ACPJ12X35-40B is discontinued; the current-production replacement is the ACEJ12X35 (swap the P for an E), a drop-in in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before converting, since the ACP series was built to the DIN standard.
Related AirTAC ACE Cylinders
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