This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X40-30SB, 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 ACPJ12X40-30SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X40-30SB 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 ACEJ12X40-30SB (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 → ACEJ12X40-30SB
- 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 ACPJ12X40-30SB
The ACPJ12X40-30SB is a double acting compact cylinder with an adjustable stroke: a stop screw trims the 40 mm extend stroke by up to 30 mm on site, giving a usable range of 10-40 mm. This 12 mm bore unit delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N push at 0.7 MPa, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures a full-length body cannot reach.
In practice, plan for roughly 34 N of real work at 0.5 MPa (about 0.6 of the rated push), which lifts about 2.9 kg vertically with a 2:1 margin - enough for small covers, chutes or sensor-actuated slides. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers at both ends, and the -S magnet code of this model, so CMSE or DMSE reed and solid-state switches can be mounted directly. Note: the ACPJ family is discontinued; the current-production replacement is the ACEJ12X40, and you should confirm the ISO 21287 mounting dimensions before swapping, since the ACP was DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-30SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-30SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X40-30SB |
| 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 ACEJ12X40-30SB (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 ACPJ12X40-30SB
| 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 ACPJ12X40-30SB Is Used
Presence-check ejector on an electronics assembly line
The fitted -S magnet feeds a DMSE switch to the PLC, while the 30 mm window lets the 10-40 mm extend stroke be trimmed to clear a 25 mm PCB tray lip with 56.5 N of push at 0.5 MPa.
Small-batch carton flap tucker
A packaging bench folding 60 g carton flaps needs only the 34 N usable working force at 0.5 MPa; the stop screw is re-set between carton heights so one cylinder covers three SKU sizes.
Reagent vial stopper press in a lab filler
Pressing stoppers onto 12 mm vials takes a light, repeatable push - the 42.4 N pull at 0.5 MPa retracts the male-thread rod quickly at up to 500 mm/s, and the short body fits inside the compact guarding.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X40-30SB with the ACEJ12X40-30SB
Size both ways: if 56.5 N push at 0.5 MPa is marginal for your load, step up to the 16 mm bore for 100.5 N; if the load is a few newtons, the same 12 mm bore in a shorter fixed-stroke ACP may suffice. The 30 mm window suits stations where one cylinder must serve several product lengths - set the stop once, re-trim at changeover. The adjuster is a mechanical end stop for the extend stroke only, not a mid-stroke lock: on air loss the piston still drifts, so do not rely on it to hold a load. This model has the male rod thread (B code) and the optional -S magnet fitted for CMSE / DMSE switches. The ACPJ is discontinued - order the ACEJ12X40 as the current drop-in and verify ISO 21287 mounting dimensions first.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X40-30SB
- ✓ 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 ACPJ12X40-30SB 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. It is double acting with a 40 mm stroke adjustable down to 10 mm via the 30 mm window, runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-500 mm/s, port M5x0.8, rod 6 mm with male thread, and fixed TPU bumpers at both ends.
Yes, the ACPJ family is out of production. The current drop-in is the ACEJ12X40 (swap the P for an E): same 12 mm bore, 40 mm stroke and force class in the ISO 21287 short body. Because the original ACP was DIN-standard, confirm the ISO 21287 mounting dimensions - FA/FB flange, LB foot and I/Y rod knuckles bolt to the ISO 21287 face - before swapping. Order the -S code again if you need the magnet for CMSE / DMSE switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X40-30SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X40-30SB replacement — usually within 7-8 hours.