This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X40-30, 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 ACPJ12X40-30
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X40-30 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 ACEJ12X40-30 (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 → ACEJ12X40-30
- 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 ACPJ12X40-30
This is a double acting compact cylinder with an adjustable extend stroke: bore 12 mm, stroke 40 mm, and a 30 mm adjustment window, so a stop screw trims the extend stroke anywhere in a 10-40 mm range on site. 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 about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight jigs and guarding where a full-length body will not fit. Note the discontinued status: the current-production drop-in is the ACEJ12X40.
Practically, plan on roughly 34 N (about 3.4 kg) of usable push at 0.5 MPa rather than the full 56.5 N rating, and expect it to lift about 2.9 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers sit at both ends, and speeds run 30-500 mm/s at 0.15-1.0 MPa (22-145 psi). This unit has no magnet fitted, so position switches cannot be mounted; order the optional -S magnet code for CMSE / DMSE sensing. Confirm ISO 21287 mounting dimensions before swapping to the ACEJ.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-30 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-30 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-30 |
| 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 ACEJ12X40-30 (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 ACPJ12X40-30
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -30 | 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 ACPJ12X40-30 Is Used
Small fixture clamping
Clamps brackets or thin sheet parts in electronics assembly jigs, using the 10-40 mm trimmed extend range to match part height without re-plumbing.
Compact gate or pusher
Pushes small components off a conveyor lane or actuates a light gate in a tight machine frame where a full-length body cannot fit.
Label and carton positioning
Positions or ejects small cartons and blisters on a packaging line, with the stop screw set so the rod never over-travels into the product.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-30 with the ACEJ12X40-30
At 56.5 N push at 0.5 MPa this 12 mm bore covers light clamping and part-presenting tasks; step down is not available in this family, while the 16 mm bore doubles the force to 100.5 N if you need headroom. The 30 mm window means the same cylinder serves strokes from 10 to 40 mm, trimming extend travel with the external stop. Remember the stop is a mechanical end stop only: on air loss the piston still drifts, so it is not a mid-stroke lock. Mounting is FA/FB flange or LB foot on the standard face. This model is discontinued; the ACEJ12X40 is the current replacement, so verify ISO 21287 dimensions first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-30
- ✓ 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 ACPJ12X40-30 FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa push is 79.2 N and pull 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. The -30 code gives a 30 mm adjustment window, so the 40 mm extend stroke can be trimmed anywhere from 10 to 40 mm with the external stop screw. It runs at 0.15-1.0 MPa (22-145 psi) and 30-500 mm/s. This model is discontinued; the ACEJ12X40 is the current replacement.
It is a short-body compact cylinder with a hard-anodized aluminium body, S45C hard-chrome rod and fixed TPU bumpers at both ends, saving about 50% of the mounting length of an ISO 15552 profile cylinder. FA/FB flange and LB foot mountings bolt to the standard face. Sensing needs the optional -S magnet code, which enables CMSE / DMSE switches; this non-S version has no magnet, so no switch can be mounted. As a discontinued model, confirm ISO 21287 mounting dimensions before ordering the ACEJ12X40 replacement.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X40-30
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X40-30 replacement — usually within 7-8 hours.