This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X45-20SB, 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 ACPJ12X45-20SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X45-20SB is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 45mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X45-20SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke45 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X45-20SB
- 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 ACPJ12X45-20SB
The ACPJ12X45-20SB is a double acting compact cylinder with an adjustable extend stroke: the -20 code gives a 20 mm stop-screw window, so the 45 mm stroke can be trimmed on site anywhere between 25 and 45 mm. It is discontinued, and the current-production drop-in is the ACEJ12X45 in the same bore, stroke and force class. This unit carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be mounted for end-of-stroke signalling.
With a 12 mm bore it delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N push at 0.7 MPa, with a theoretical maximum of 11.5 kgf at 1.0 MPa. In practice, plan on roughly 34 N of real work at 0.5 MPa, which corresponds to lifting about 2.9 kg vertically with a 2:1 margin. The short ISO 21287-class body saves about 50% of the mounting length of an ISO 15552 profile cylinder, and a fixed TPU bumper sits at both ends. Air supply is 0.15-1.0 MPa (22-145 psi), filtered to 40 um, with speeds of 30-500 mm/s.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-20SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-20SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X45-20SB |
| Bore size | Ø12 mm |
| Stroke | 45 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 ACEJ12X45-20SB (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 ACPJ12X45-20SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 ACPJ12X45-20SB Is Used
Micro part ejection from press dies
The trimmed 25-45 mm extend range and 56.5 N push at 0.5 MPa clear small stamped clips or terminals off a die face without over-travel.
Position-signalled test fixtures
With the -S magnet fitted, CMSE or DMSE switches confirm full retract on a 45 mm electronics test nest running at 30-500 mm/s.
Light lid latching on lab equipment
About 2.9 kg of vertical lift capacity with a 2:1 margin is enough to pull down a small inspection cover or sample holder.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-20SB with the ACEJ12X45-20SB
At 56.5 N push (0.5 MPa) this 12 mm bore suits light clamping and positioning; step up to the 16 mm bore (100.5 N push) or the 20 mm bore (157.1 N push) if the load grows. Note that the stop screw only sets the extend position - it is not a mid-stroke lock, so on air loss the piston can still drift. The male rod thread (B code) and PT ports suit external couplings, and FA/LB mounts bolt to the ISO 21287 face. For new builds, order the ACEJ12X45 and confirm ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X45-20SB
- ✓ 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 ACPJ12X45-20SB 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. The bore is 12 mm with a 6 mm male-thread rod, M5x0.8 ports, a 25-45 mm adjustable extend range, 0.15-1.0 MPa (22-145 psi) operating pressure and 30-500 mm/s speed.
The -20 window lets an external stop screw shorten the 45 mm extend stroke by up to 20 mm, giving 25-45 mm of usable travel; it cannot lengthen the stroke past 45 mm. The ACPJ family is discontinued - the current-production drop-in is the ACEJ12X45, which matches 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
Request a Quote for the ACEJ12X45-20SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X45-20SB replacement — usually within 7-8 hours.