This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X70-20, 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 ACPJ12X70-20
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X70-20 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 ACEJ12X70-20 (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 → ACEJ12X70-20
- 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 ACPJ12X70-20
Double acting and adjustable, the ACPJ12X70-20 is a DIN-standard compact cylinder with a 12 mm bore and a 70 mm stroke that a stop screw trims by up to 20 mm, giving a usable extend range of 50-70 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those rise to 79.2 N and 59.4 N, with a theoretical 11.5 kgf at 1.0 MPa. The 70 mm stroke exceeds the 50 mm maximum standard stroke for this bore, so it is a made-to-order build. Note this model is discontinued; the current-production replacement is the ACEJ12X70.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body will not fit. Plan on roughly 34 N (about 3 kg vertical lift) of real work at 0.5 MPa rather than the full 56.5 N rating. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers sit at both ends, and the rod end is female M3x0.5 with an M5x0.8 port. No magnet is fitted on this code, so position switches cannot be mounted; order the -S version if CMSE / DMSE sensing is needed.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20 Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20 |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X70-20 |
| 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 ACEJ12X70-20 (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 ACPJ12X70-20
| 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 ACPJ12X70-20 Is Used
PCB test fixture clamping
The 50-70 mm trim range lets a technician set exact clamp travel on a 12 mm bore pressing 56.5 N at 0.5 MPa, enough for lightweight test sockets and go/no-go gauges.
Lab sample ejector
At 79.2 N push at 0.7 MPa the rod ejects vials or slides from a compact analysis station, where the short body fits under a benchtop enclosure.
Small-parts press fit
A 3 kg-class vertical press force suits seating dowels or bushings in electronics assembly, with the stop screw dialing in the stroke per part revision.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20 with the ACEJ12X70-20
Size up if 56.5 N at 0.5 MPa is marginal: the 16 mm bore delivers 100.5 N push and the 20 mm bore 157.1 N at the same pressure. Size down only if the load is under about 34 N, the practical working figure for this 12 mm bore. Remember the stop screw trims the extend stroke only; it is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. FA/FB flange and LB foot mountings bolt to the standard face. For new designs, specify the ACEJ12X70 instead and confirm ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X70-20
- ✓ 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 ACPJ12X70-20 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 -20 code gives a 20 mm adjustment window, so the 70 mm stroke can be shortened to any extend length from 50 to 70 mm with the stop screw. Speed range is 30-500 mm/s, operating pressure 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi). The 70 mm stroke is non-standard for this bore and made to order.
Not on this code: no magnet is fitted, so no switch can be read. The optional -S magnet enables CMSE / DMSE reed or solid-state switches. The ACPJ family is discontinued; the current drop-in is the ACEJ12X70 (ISO 21287, same bore, stroke and force class). Confirm the ISO 21287 mounting dimensions before swapping, because the ACP follows the older DIN-standard footprint.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X70-20
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X70-20 replacement — usually within 7-8 hours.