This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X70-20S, 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 ACPJ12X70-20S
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X70-20S 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 ACEJ12X70-20S (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 → ACEJ12X70-20S
- 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 ACPJ12X70-20S
A double acting compact cylinder with an adjustable extend stroke, the ACPJ12X70-20S carries the optional -S magnet so CMSE / DMSE reed or solid-state switches can be mounted directly on the 12 mm bore body. Air pushes the rod out and pulls it back, and the -20 code gives a 20 mm adjustment window: a stop screw trims the 70 mm stroke down on site, so the usable extend range is 50-70 mm. At 0.5 MPa this bore delivers 56.5 N push and 42.4 N pull; at 0.7 MPa that rises to 79.2 N push and 59.4 N pull, with a theoretical ceiling of 11.5 kgf at 1.0 MPa.
The 70 mm stroke exceeds the 50 mm maximum standard stroke for a 12 mm bore, so this unit is made to order. The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into slim fixtures, small guarding and compact pick stations. In practice, plan on 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. Note this model is discontinued: the current-production replacement is ACEJ12X70, the same bore, stroke and force class, so confirm the ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20S Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20S |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X70-20S |
| 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 ACEJ12X70-20S (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 ACPJ12X70-20S
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -20 | 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 ACPJ12X70-20S Is Used
Small-parts ejection on assembly lines
The 50-70 mm adjustable extend stroke with the fitted -S magnet and CMSE switches lets an electronics line confirm end position before a 2-3 kg PCB carrier is nudged off a nest at 30-500 mm/s.
Micro press-fit of connector pins
With about 34 N of usable push at 0.5 MPa, the 12 mm bore suits pressing M12 sensor pigtails or ribbon-cable contacts in telecom fixture work where the stop screw sets the exact seating depth.
Compact lift in lab automation
The short body, about 50% shorter in mounting length than an ISO 15552 profile cylinder, lifts roughly 2.9 kg vertically with margin - ideal for raising sample trays inside a benchtop diagnostic analyzer.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20S with the ACEJ12X70-20S
Size both ways: the 12 mm bore gives 56.5 N push at 0.5 MPa, while a 16 mm bore steps up to 100.5 N and a 20 mm bore reaches 157.1 N in the same compact family. If your part weight sits near 3 kg, the 12 mm bore with a 2:1 margin is the right call; heavier loads should move up a bore. The adjuster is a mechanical end stop for the extend stroke only - it is not a mid-stroke lock, so on air loss the piston can still drift and the stop must never be treated as a load-holding brake. FA/FB flange and LB foot mountings bolt to the standard face, and the fitted -S magnet accepts CMSE / DMSE switches. Order the ACEJ12X70 as the current drop-in replacement.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X70-20S
- ✓ 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 ACPJ12X70-20S 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. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, port M5x0.8, female rod thread M3x0.5, rod 6 mm, fixed TPU bumper at both ends. The 70 mm stroke is a made-to-order size above the 50 mm standard maximum for this bore.
The -20 code means a stop screw shortens the 70 mm extend stroke by up to 20 mm, giving a 50-70 mm working range; it trims the stroke only and never lengthens it past 70 mm. The stop is a mechanical end stop, not a mid-stroke lock, so the piston can drift if air is lost. This ACPJ model is discontinued - the current-production replacement is ACEJ12X70, a drop-in in the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, because the ACP is DIN-standard.
Related AirTAC ACE Cylinders
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