This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X125-30SB, 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 ACPJ12X125-30SB
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X125-30SB is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 125mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X125-30SB (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke125 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X125-30SB
- 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 ACPJ12X125-30SB
This AirTAC ACPJ12X125-30SB is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 125 mm stroke by up to 30 mm on site, giving a usable range of 95-125 mm. The 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N push at 0.7 MPa. Note that the 125 mm stroke exceeds the 50 mm maximum standard stroke for bore 12, so this unit is a made-to-order build. The ACPJ family is discontinued; the current-production replacement is the ACEJ12X125, so confirm ISO 21287 mounting dimensions before swapping.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits slim fixtures and guarded stations. Construction is a hard-anodized aluminium body with an S45C hard-chrome rod, a male rod thread (B code), PT ports and fixed TPU bumpers at both ends. Because the -S magnet is fitted, CMSE or DMSE reed and solid-state switches can be mounted directly. In practice, plan on about 34 N of real work at 0.5 MPa, which lifts roughly 2.9 kg vertically with a 2:1 margin.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-30SB Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-30SB |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X125-30SB |
| Bore size | Ø12 mm |
| Stroke | 125 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 ACEJ12X125-30SB (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 ACPJ12X125-30SB
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -30 | 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 ACPJ12X125-30SB Is Used
Position-verified ejection on SMT lines
The fitted -S magnet lets a CMSE switch confirm the trimmed 95-125 mm extend position before the next PCB index, with 56.5 N enough to push small boards off a rail.
Clamping small housings in test rigs
About 34 N of usable force at 0.5 MPa holds light aluminium die-cast covers against a gauge fixture, and the stop screw sets the exact clamp approach.
Lowering caps in a bottling check station
The 2.9 kg vertical-lift margin suits pressing plastic caps onto sample bottles, with the TPU bumpers softening both ends at 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X125-30SB with the ACEJ12X125-30SB
Size against the load: the 12 mm bore gives 56.5 N push at 0.5 MPa; if you need more, the 16 mm bore offers 100.5 N and the 20 mm bore 157.1 N under the same pressure. The stop screw only shortens the extend stroke within the 30 mm window - it is a mechanical end stop, not a mid-stroke lock, so the piston still drifts if air is lost. FA/FB flanges and LB feet bolt to the standard face, and the fitted -S magnet accepts CMSE / DMSE switches. For new designs, order the ACEJ12X125 instead, matching the same bore, stroke and force class.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X125-30SB
- ✓ 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 ACPJ12X125-30SB FAQ
At 0.5 MPa the 12 mm bore pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -30 code gives a 30 mm adjustment window, so the 125 mm extend stroke can be trimmed anywhere in a 95-125 mm range. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and the 125 mm stroke is made to order since bore 12 normally tops out at 50 mm.
It is a short-body compact cylinder whose mounting length is about 50% less than an ISO 15552 profile cylinder, with a hard-anodized aluminium body, male rod thread, M5x0.8 ports and fixed TPU bumpers. The ACPJ family is discontinued; the drop-in successor is the ACEJ12X125 in the same bore, stroke and force class - confirm the ISO 21287 mounting dimensions before converting.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X125-30SB
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X125-30SB replacement — usually within 7-8 hours.