Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 25mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. Its short compact envelope saves about 50% of the mounting length of an ISO 15552 profile cylinder.
- BoreØ12 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10
The ACEJ12X25-10 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 25 mm stroke by up to 10 mm on site, giving a usable range of 15-25 mm. At 0.5 MPa the 12 mm bore pushes 56.5 N and pulls 42.4 N, rising to 79.2 N at 0.7 MPa. Its short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and small fixtures where a full-length body will not fit.
In practice, plan for roughly 34 N of real work at 0.5 MPa (about 0.6 of the push rating), which lifts about 2.9 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a 6 mm S45C hard-chrome rod with a female M3x0.5 thread, and a fixed TPU bumper at each end absorbs end-of-stroke energy. Note that no magnet is fitted on this model; the optional -S code adds one for CMSE / DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 25 mm |
| Acting type | Double acting, 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 TPU bumper (both ends) |
| Max standard stroke | Up to 50 mm |
Specifications follow the official AirTAC ACE-series (ISO 21287) datasheet. Body: hard-anodized aluminium alloy; piston rod: S45C carbon steel with hard-chrome plating. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G. A built-in magnet is OPTIONAL — add the -S code to fit CMSE / DMSE position sensors.
Theoretical Output Force (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| -10 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| S | Optional built-in magnet for CMSE / DMSE sensors (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
ACE-family variants: ACE (double acting), ASE / ATE (single acting push / pull), ACED (double rod), ACEJ (adjustable stroke), TACE / TACED (non-rotating twin-guide yoke). Mounting accessories: FA / FB flange, LB foot, CA / CB clevis, CR, SDB pivot, FTC; plus I and Y knuckles. Thread PT (blank) / G.
Where the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10 Is Used
Micro part ejection
Ejects small machined or moulded parts from a nest on an assembly bench, with the 10 mm window letting operators fine-trim the 15-25 mm throw without changing cylinders.
Fixture presence check
With the optional -S magnet and a CMSE switch, confirms a workpiece is seated in a drill or press jig before the cycle starts.
Light-duty lab clamping
Holds small PCBs or sensor housings during test and soldering, where the compact body fits inside a benchtop fixture frame.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10 the Right Cylinder?
At this force class the 12 mm bore suits light clamping and positioning; if 56.5 N at 0.5 MPa is marginal, step up to the 16 mm bore (100.5 N push at 0.5 MPa), and drop to a fixed-stroke ACE if no on-site trimming is needed. The -10 window shortens the extend stroke only - it never lengthens it past 25 mm - and the stop screw is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. Mount with FA flange or LB foot brackets; order the -S variant if CMSE / DMSE position sensing is required.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Short stroke fits the compact body
- ✓ Port/thread type (PT / G)
- ✓ Add -S if you need the magnet for sensors
- ✓ Rod type (female / male B) & mount (FA/LB/CA)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Compact body: keep the stroke short and avoid side load on the rod.
- check Do not dismantle the threaded front/back covers.
- check Keep speed within the rated range; the TPU bumper absorbs stroke-end energy.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10 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 runs on air filtered to 40 um at 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, with a 6 mm rod, female M3x0.5 thread and M5x0.8 ports.
An external stop screw shortens the extend stroke anywhere within the ordered 10 mm window, so the 25 mm stroke can be set anywhere from 15 to 25 mm on site; it cannot extend beyond 25 mm. The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, uses a fixed TPU bumper at both ends, bolts to FA/LB brackets, and accepts CMSE / DMSE switches only when the optional -S magnet is ordered.
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