This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X70-30B, 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 ACPJ12X70-30B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X70-30B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 70mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X70-30B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke70 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X70-30B
- 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 ACPJ12X70-30B
The ACPJ12X70-30B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 70 mm stroke by up to 30 mm, giving a usable range of 40-70 mm. 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. Its short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures a full-length body cannot reach. Note the 70 mm stroke exceeds the 50 mm standard maximum for bore 12, so it is made to order.
Practical sizing: plan on roughly 34 N of real work at 0.5 MPa (about 60% of the push rating), which is roughly 3 kg of vertical lift with a 2:1 margin. The rod carries a male thread (the B code) and the ports are M5x0.8. A fixed TPU bumper sits at both ends. This model is discontinued; the current-production replacement is the ACEJ12X70 in the same bore, stroke and force class - confirm ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-30B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-30B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X70-30B |
| Bore size | Ø12 mm |
| Stroke | 70 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 ACEJ12X70-30B (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 ACPJ12X70-30B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×70 | 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 ACPJ12X70-30B Is Used
Micro part ejection from stamping dies
The 56.5 N push at 0.5 MPa is enough to strip small pressed terminals or pins out of a die, and the 40-70 mm adjustable range lets you tune the eject point without re-plumbing.
Lab sample pusher in compact analysers
A 6 mm male-thread rod with a knuckle drives sample trays into a test station; the short body fits inside instrument housings where a profile cylinder will not.
Small carton flap tuck on a packing line
Running at 30-500 mm/s, the cylinder folds light cardboard flaps at up to 79.2 N push at 0.7 MPa, with the stop screw set so the flap is pressed, not crushed.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-30B with the ACEJ12X70-30B
For light clamping and positioning in cramped spaces, this 12 mm bore suits loads in the 30-55 N band at 0.5 MPa. If you need more muscle, the 16 mm bore gives 100.5 N push at 0.5 MPa; if your load is under about 35 N, the same family in a smaller frame may suffice - confirm from datasheet. The 30 mm adjustment window only shortens the extend stroke; it is a mechanical end stop, not a mid-stroke lock, so the piston still drifts on air loss. FA/FB flange and LB foot mountings bolt to the standard face, and the optional -S magnet enables CMSE / DMSE switches - this unit has no magnet fitted. Order the ACEJ12X70 as the current drop-in.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X70-30B
- ✓ 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 ACPJ12X70-30B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those rise to 79.2 N push and 59.4 N pull. 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), speed 30-500 mm/s, and the fluid must be air filtered to 40 um. The 70 mm stroke is a made-to-order length because the bore 12 standard maximum is 50 mm.
The -30 code sets a 30 mm adjustment window: an external stop screw shortens the extend stroke anywhere between 40 and 70 mm. It is a mechanical end stop only - it never holds a load if air is lost. This ACPJ model is discontinued; the current-production replacement is the ACEJ12X70 (swap the P for an E), a drop-in in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, and remember the magnet is the optional -S code - without it no CMSE / DMSE switch can be fitted.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X70-30B
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