This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X45-40SB, 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 ACPJ12X45-40SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X45-40SB 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 ACEJ12X45-40SB (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 → ACEJ12X45-40SB
- 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 ACPJ12X45-40SB
This double acting compact cylinder trims its extend stroke on site: the -40 code gives a 40 mm adjustment window on the 45 mm stroke, so a stop screw sets any usable range from 5 to 45 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N at 0.7 MPa, with a fixed TPU bumper at both ends. Note that this model is discontinued; the current-production replacement is the ACEJ12X45, same bore, stroke and force class.
The short ISO 21287-class body saves roughly 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. The -S magnet is fitted, so CMSE or DMSE reed and solid-state switches mount directly for end-of-stroke signals. As a working figure, plan on about 34 N of real push at 0.5 MPa (roughly 60% of rating), which lifts about 3 kg vertically - halve that to about 1.7 kg for a 2:1 margin on a vertical lift.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-40SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-40SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X45-40SB |
| 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 ACEJ12X45-40SB (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 ACPJ12X45-40SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×45 | Stroke length in mm. |
| -40 | 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 ACPJ12X45-40SB Is Used
Signalled micro-clamp on a PCB test fixture
The 40 mm window lets you dial the stroke down to a few millimetres for a light 34 N-class clamp, and the fitted -S magnet feeds a CMSE switch to confirm the part is held before the test cycle starts.
Ejector pin on a small assembly press
About 3 kg of vertical push at 0.5 MPa is enough to nudge finished watch or sensor components off a nest, and the 5-45 mm adjustable range matches shallow part pockets without re-machining the tooling.
Vial push-off in a compact lab filler
The short body, about 50% shorter in mounting length than an ISO 15552 profile cylinder, fits behind tight guarding, while the male rod thread (B code) takes a small pusher pad directly.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X45-40SB with the ACEJ12X45-40SB
At 12 mm bore this is the lightest force step in the family: 56.5 N push at 0.5 MPa versus 100.5 N for the 16 mm bore and 157.1 N for the 20 mm bore, so step up if your part weight or clamp force is marginal. The male rod thread (B code) suits external knuckles and tooling links; FA/FB flange or LB foot mountings bolt to the same face. The stop screw is a mechanical end stop for the extend stroke only - on air loss the piston still drifts, so it is not a load-holding lock. Order the ACEJ12X45 as the current drop-in and confirm ISO 21287 mounting dimensions before swapping, since ACP is DIN-standard.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X45-40SB
- ✓ 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 ACPJ12X45-40SB FAQ
Push is 56.5 N and pull 42.4 N at 0.5 MPa; at 0.7 MPa push is 79.2 N and pull 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -40 code gives a 40 mm adjustment window on the 45 mm stroke, so the extend stroke is settable anywhere from 5 to 45 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and the bore 12 port is M5x0.8 with a 6 mm rod in male thread.
Yes - this model carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches mount on the body for end-of-stroke detection. The ACPJ family is discontinued; the current-production replacement is the ACEJ12X45, which matches the same bore, stroke and force class. Confirm the ISO 21287 mounting dimensions before swapping, because the ACP body follows the DIN standard.
Related AirTAC ACE Cylinders
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Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X45-40SB replacement — usually within 7-8 hours.