Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10S 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 ACEJ12X25-10S
The ACEJ12X25-10S is a double acting AirTAC compact cylinder built to ISO 21287, with a 12 mm bore, a 25 mm stroke and a 10 mm adjustment window. An external stop screw trims the extend stroke on site anywhere from 15 to 25 mm, so one unit can be tuned to several jig positions without swapping parts. 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 maximum of 11.5 kgf at 1.0 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight fixtures a full-length body cannot reach.
Practically, plan on roughly 34 N of usable push at 0.5 MPa, and expect it to lift about 2.9 kg vertically once you keep a 2:1 margin. The hard-anodized aluminium body carries a hard-chrome plated S45C rod with a female M3x0.5 thread, and the -S code on this model means the magnet is fitted, so CMSE or DMSE reed and solid-state switches can be clipped on for end-of-stroke signals. A fixed TPU bumper at each end absorbs end-of-stroke energy, the M5x0.8 ports take PT fittings, and speed runs 30-500 mm/s at 0.15-1.0 MPa (22-145 psi).
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10S |
|---|---|
| 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 ACEJ12X25-10S
| 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 ACEJ12X25-10S Is Used
Micro part ejection from fixtures
The 15-25 mm trimmed extend range is ideal for nudging small machined or moulded parts off a locating pin, with the 56.5 N push at 0.5 MPa enough for grams-to-tens-of-grams workpieces.
Position-verified test stations
Because the -S magnet is fitted, CMSE or DMSE switches confirm the rod has reached the set position on a 25 mm or shorter probe stroke in electronics or lab QC benches.
Light hold-down on small assemblies
About 2.9 kg of vertical lift capability with a 2:1 margin makes this a fit for clamping PCBs, covers or brackets during a screwdriving or gluing step.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X25-10S the Right Cylinder?
Check the load first: with 56.5 N of push at 0.5 MPa this bore suits light clamping, part presence and small transfers up to about 34 N of real work. If your load needs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa); if 56.5 N is generous for the job, the same family in a smaller size keeps the envelope tight. Remember the stop screw only shortens the extend stroke within the 10 mm window and is not a mid-stroke lock, so the rod will drift if air is lost under load. Mount with FA flange or LB foot brackets on the ISO 21287 face, and since the -S magnet is already fitted, order CMSE or DMSE switches when you need position feedback.
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 ACEJ12X25-10S 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 gives a 10 mm adjustment window, so the external stop screw sets the extend stroke anywhere between 15 and 25 mm. It is a mechanical end stop for the extend stroke only, not a load-holding brake, and the rod will drift if air pressure is lost.
It is an ISO 21287 compact cylinder whose short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow guards and dense jig plates. A fixed TPU bumper at each end absorbs end-of-stroke energy. FA flange and LB foot brackets bolt to the standard face, and because this model carries the optional -S magnet, CMSE and DMSE reed or solid-state switches can be mounted in the body slots for end-of-stroke detection.
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