This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X70-20SB, 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 ACPJ12X70-20SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X70-20SB 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 ACEJ12X70-20SB (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 → ACEJ12X70-20SB
- 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 ACPJ12X70-20SB
Double acting and adjustable in stroke, the ACPJ12X70-20SB is a DIN-standard compact cylinder with a 12 mm bore and a 70 mm stroke. A stop screw trims the extend stroke by up to 20 mm on site, giving a usable range of 50-70 mm, and the -S code means the magnet is fitted so CMSE or DMSE reed and solid-state switches can be mounted directly on the body. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N.
The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding where a full-length body cannot. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers sit at both ends, and the male rod thread (B code) suits knuckle brackets. Note this model is discontinued: the current-production drop-in is ACEJ12X70, so confirm ISO 21287 mounting dimensions before swapping. As a working rule, plan on roughly 34 N (about 2.9 kg lifted vertically with a 2:1 margin) rather than the full 56.5 N rating.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X70-20SB |
| 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 ACEJ12X70-20SB (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 ACPJ12X70-20SB
| 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 ACPJ12X70-20SB Is Used
Lab slide gating
At 56.5 N push and a 50-70 mm trimmed stroke, this bore 12 cylinder gates small sample trays on analytical lab automation where space is scarce.
Presence confirmation on pick stations
With the -S magnet fitted, CMSE or DMSE switches confirm extend position on a 70 mm stroke in compact electronics assembly fixtures.
Micro press-in of connectors
About 34 N of usable force at 0.5 MPa suits light press-in of small terminals and pins in jig-built telecom harness benches.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X70-20SB with the ACEJ12X70-20SB
Size both ways before ordering: the 16 mm bore pushes 100.5 N at 0.5 MPa if you need more margin, while staying at bore 12 keeps the M5x0.8 port and 6 mm rod. The 70 mm stroke exceeds the 50 mm maximum standard stroke for this bore, so it is a made-to-order item - expect lead time. The 20 mm window lets you trim the extend stroke between 50 and 70 mm; the stop is a mechanical end stop only, not a mid-stroke lock, so the piston still drifts if air is lost. FA/FB flange and LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet works with CMSE / DMSE switches. For new projects, order ACEJ12X70 instead - this ACPJ is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X70-20SB
- ✓ 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 ACPJ12X70-20SB FAQ
Push is 56.5 N and pull 42.4 N at 0.5 MPa; at 0.7 MPa push rises to 79.2 N and pull to 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. It is double acting with a 12 mm bore, 6 mm rod, M5x0.8 port, male rod thread, operating pressure 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, and fixed TPU bumpers at both ends. The 70 mm stroke is non-standard for this bore (max standard 50 mm), so it is made to order.
The -20 code sets a 20 mm window: an external stop screw shortens the 70 mm extend stroke on site to anywhere in a 50-70 mm range. It is a mechanical end stop for the extend stroke only - it never lengthens the stroke and does not hold a load if air is lost. The ACPJ family is discontinued; the current-production drop-in is ACEJ12X70 in the same bore, stroke and force class. Confirm ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X70-20SB
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