This model is discontinued
AirTAC has phased out the ACP series. You can still order this code here: we ship the current replacement ACEJ12X50-10B, 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 ACPJ12X50-10B
The AirTAC ACPJ Adjustable Compact Cylinder ACPJ12X50-10B is a double acting, double rod, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 50mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X50-10B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X50-10B
- 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 ACPJ12X50-10B
This ACPJ12X50-10B is a double acting compact cylinder with an adjustable extend stroke: a stop screw trims the 50 mm stroke by up to 10 mm, giving a usable range of 40-50 mm. Air pushes the piston both ways, so no spring is involved, and the bore 12 size delivers 56.5 N push and 42.4 N pull at 0.5 MPa (79.2 N / 59.4 N at 0.7 MPa). The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into slim jigs and guarded stations where a full-length body simply will not fit.
Note before ordering: the ACPJ family is discontinued, and the current-production drop-in is the ACEJ12X50 - same bore, stroke and force class - so confirm the ISO 21287 mounting dimensions before swapping, since the ACP follows a DIN-standard footprint. This unit carries the B male rod thread and a PT port thread, and because no S code is ordered there is no magnet fitted, so CMSE / DMSE switches cannot be used on this version. For planning, treat about 0.6 of the 56.5 N push (roughly 34 N, or about 3.4 kgf) as the practical working force at 0.5 MPa rather than the full rating.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-10B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-10B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X50-10B |
| Bore size | Ø12 mm |
| Stroke | 50 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 ACEJ12X50-10B (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 ACPJ12X50-10B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -10 | 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 ACPJ12X50-10B Is Used
Micro part clamping
Holds small electronics or watch components in a 40-50 mm clamping range during soldering or inspection, using the 56.5 N push at 0.5 MPa and the stop screw to set the exact clamp position.
Ejector on a compact pick station
Pushes tiny stamped parts off a nest on an automated assembly line; the short body fits inside the guard where a full-length ISO 15552 profile cylinder would not.
Lab fixture actuation
Cycles a small cover or shutter on a test rig at 30-500 mm/s, with the male B rod thread taking an I or Y knuckle for the linkage.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-10B with the ACEJ12X50-10B
At bore 12 the 56.5 N push at 0.5 MPa suits light clamping and part presence checks; if your load needs more, step up to bore 16 (100.5 N push at 0.5 MPa) or bore 20 (157.1 N). The 10 mm adjustment window only shortens the extend stroke - it is a mechanical end stop, not a mid-stroke lock, so on air loss the piston still drifts and cannot hold a load. Match FA/FB flange or LB foot hardware to your fixture, and remember the optional -S magnet is what enables CMSE / DMSE switch sensing. For new builds, order the ACEJ12X50 instead, as this model is discontinued.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X50-10B
- ✓ 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 ACPJ12X50-10B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa that rises to 79.2 N push and 59.4 N pull, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -10 code is a 10 mm adjustment window: an external stop screw shortens the 50 mm extend stroke on site, so the working range is 40-50 mm. It cannot lengthen the stroke past 50 mm, and the stop is not a load-holding brake - on air loss the piston drifts.
It is a short-body compact unit with a hard-anodized aluminium body, S45C hard-chrome rod, fixed TPU bumpers at both ends and an M5x0.8 port, saving about 50% of the mounting length of an ISO 15552 profile cylinder. The ACPJ family is no longer in production; the current drop-in is the ACEJ12X50 (same bore, stroke and force class). Confirm the ISO 21287 mounting dimensions before swapping, since the ACP is DIN-standard, and order the -S code if you need the optional magnet for CMSE / DMSE switches.
Related AirTAC ACE Cylinders
Request a Quote for the ACEJ12X50-10B
Send us the quantity and destination. We confirm price, stock and lead time on the ACEJ12X50-10B replacement — usually within 7-8 hours.