This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X70-50S, 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 ACPJ12X70-50S
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X70-50S 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 ACEJ12X70-50S (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 → ACEJ12X70-50S
- 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 ACPJ12X70-50S
Double acting and adjustable, this discontinued ACPJ12X70-50S carries a 12 mm bore and a 70 mm made-to-order stroke (above the 50 mm standard for this bore) with a 50 mm trim window, so a stop screw sets any extend stroke from 20 to 70 mm on site. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa that rises to 79.2 N push. The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into cramped fixtures and guarding.
The -S code on this unit means the optional magnet is fitted, so CMSE or DMSE reed and solid-state switches can be clamped straight onto the hard-anodized aluminium body. Plan on about 34 N (roughly 3.5 kg) of usable push at 0.5 MPa, and expect about 2.9 kg of vertical lift with a 2:1 margin. The fixed TPU bumper at each end only decelerates the rod; it never holds a load if air is lost. This model is discontinued - the current drop-in is the ACEJ12X70, and buyers should confirm ISO 21287 mounting dimensions before swapping, since ACP follows the older DIN layout.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-50S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-50S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X70-50S |
| 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 ACEJ12X70-50S (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 ACPJ12X70-50S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -50 | 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 ACPJ12X70-50S Is Used
Position-flagged ejector on a small assembly press
The fitted magnet lets a CMSE switch confirm full extension before a 30 g connector housing is pushed out of a nest, trimming the stroke anywhere from 20 to 70 mm to match the nest depth.
Stop-adjusted part clamp in a compact jig
About 34 N of usable push at 0.5 MPa holds a thin aluminium bracket against a locator, and the 50 mm window lets one cylinder serve several bracket widths without re-plumbing.
Sample presenter on a benchtop test rig
The short body, roughly half the length of an ISO 15552 profile cylinder, fits inside a benchtop enclosure, while a DMSE switch signals the 70 mm made-to-order stroke end to the controller.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-50S with the ACEJ12X70-50S
At 12 mm bore this is the smallest force class in the family: 56.5 N push at 0.5 MPa versus 100.5 N for a 16 mm bore and 157.1 N for a 20 mm bore. Step up if your part mass or friction load exceeds about 34 N of real work. The 70 mm stroke is a made-to-order length for this bore, so lead time applies. The female M3x0.5 rod thread takes standard I/Y knuckles, and FA flange or LB foot mounts bolt to the same face. If you need position feedback, this S-coded unit already carries the optional magnet for CMSE / DMSE switches. For new designs, order the ACEJ12X70 instead - same bore, stroke and force class, currently in production.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X70-50S
- ✓ 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 ACPJ12X70-50S 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; theoretical maximum is 11.5 kgf at 1.0 MPa. The -50 code gives a 50 mm adjustment window, so the stop screw sets any extend stroke between 20 and 70 mm. Note the 70 mm stroke itself is a made-to-order length, since the standard maximum for a 12 mm bore is 50 mm. The stop is a mechanical end stop only - it does not lock the piston if air pressure is lost.
No - the ACPJ family is discontinued. The current-production replacement is the ACEJ12X70, an ISO 21287 compact cylinder in the same 12 mm bore, 70 mm stroke and force class. Because the ACP follows the older DIN-standard layout, confirm the ISO 21287 mounting dimensions before swapping. This unit carries the optional -S magnet for CMSE / DMSE switches, runs on 0.15-1.0 MPa (22-145 psi) air filtered to 40 um at 30-500 mm/s, and has a fixed TPU bumper at both ends.
Related AirTAC ACE Cylinders
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