Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10SB 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 ACEJ12X25-10SB
A double acting compact actuator built to ISO 21287, the ACEJ12X25-10SB pairs a 12 mm bore with a 25 mm stroke that can be trimmed on site: an external stop screw shortens the extend stroke by up to 10 mm, giving a usable range of 15-25 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 theoretical peak of 11.5 kgf at 1.0 MPa. In practice plan on roughly 34 N (about 3.4 kgf) of real work at 0.5 MPa, which lifts roughly 2.8 kg vertically with a 2:1 margin.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures, small gates and bench-top modules. A hard-anodized aluminium body carries an S45C hard-chrome plated 6 mm rod, fixed TPU bumpers absorb end-of-stroke shock at both ends, and because this model carries the -S magnet, CMSE / DMSE reed or solid-state switches can be fitted for end-position sensing. The B code gives a male rod thread, and the port is M5x0.8.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10SB |
|---|---|
| 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 ACEJ12X25-10SB
| 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 ACEJ12X25-10SB Is Used
Micro fixture clamping
The 56.5 N push at 0.5 MPa is enough to hold small PCBs, connector housings or laser-cut shims in a drilling or marking fixture, with the 15-25 mm trim range matching shallow part pockets.
Sensed eject or present check
With the -S magnet fitted, CMSE / DMSE switches confirm the rod reached the trimmed end position, ideal for reject chutes or part-present probes on compact automation cells.
Small gate and lid actuation
The short body, about 50% shorter in mounting length than an ISO 15552 profile cylinder, drives slim access gates and test-chamber lids where a full-length cylinder simply will not fit.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10SB the Right Cylinder?
At this bore size the 56.5 N push at 0.5 MPa suits light clamping, part present detection and small slide drives; if your load needs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa) or the 20 mm bore (157.1 N). Going smaller is not possible, as 12 mm is the smallest ACEJ bore. Remember the stop screw is a mechanical end stop only: on air loss the piston still drifts, so it is not a mid-stroke lock. FA flange or LB foot mounts bolt to the ISO 21287 face, and the -S magnet on this model lets CMSE / DMSE switches report position. Speed range is 30-500 mm/s at 0.15-1.0 MPa (22-145 psi).
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 ACEJ12X25-10SB FAQ
Bore 12 mm, stroke 25 mm with a 10 mm adjustment window (usable extend range 15-25 mm). Push is 56.5 N and pull 42.4 N at 0.5 MPa; push rises to 79.2 N and pull to 59.4 N at 0.7 MPa; theoretical maximum is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um. Port is M5x0.8 and the rod end is male thread (B code).
An external stop screw shortens the extend stroke by up to 10 mm on site; it cannot lengthen the stroke past the ordered 25 mm, and it acts as an end stop only, never a load-holding brake. For sensing, this model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount in the body slots. The fixed TPU bumpers at both ends absorb end-of-stroke energy, and FA flange or LB foot mounts bolt straight to the ISO 21287 face.
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