Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 40mm 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
- Stroke40 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 ACEJ12X40-30
The ACEJ12X40-30 is a double acting, adjustable-stroke compact cylinder built to ISO 21287. Its 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, with a theoretical peak of 11.5 kgf at 1.0 MPa. The hard-anodized aluminium body and S45C hard-chrome plated rod keep wear low in high-cycle duty. A fixed TPU bumper at each end absorbs end-of-stroke impact.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits into tight fixtures, guarding and small gantries. An external stop screw trims the extend stroke anywhere within the ordered 30 mm window, giving a usable range of 10-40 mm on site. As a rule of thumb, plan for roughly 34 N of usable work at 0.5 MPa, which is about 3 kg of vertical lift with a 2:1 margin. Note that the stop screw is a mechanical end stop only: on air loss the piston drifts, so it never holds or brakes a load.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 40 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 ACEJ12X40-30
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -30 | 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 ACEJ12X40-30 Is Used
Micro part ejection
Ejects small stamped or moulded parts from light-duty nests where 56.5 N at 0.5 MPa is ample and the 10-40 mm trim range matches varying part heights.
Compact presence check
With the optional -S magnet and a CMSE or DMSE switch, the short body serves as an end-position confirm cylinder inside tight assembly-station fixtures.
Lab and test rigs
Provides repeatable 10-40 mm press or clamp moves on benchtop test fixtures, with the M5x0.8 port keeping tubing runs small.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30 the Right Cylinder?
At 12 mm bore this is the lightest ACEJ force class; 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 push at 0.5 MPa). Check that 56.5 N push and 42.4 N pull at 0.5 MPa cover your load in both directions before ordering. The rod end here is female M3x0.5; order the B code if you need a male thread. FA flange and LB foot mounts bolt to the standard ISO 21287 face. The magnet is not fitted on this code; add the -S option if you want CMSE or DMSE switch sensing. Speed range is 30-500 mm/s and pressure is 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 ACEJ12X40-30 FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the -30 stop screw trims the 40 mm stroke by up to 30 mm, so the working range is 10-40 mm. Operating pressure is 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, air filtered to 40 um. Port is M5x0.8, rod thread female M3x0.5, and the maximum standard stroke for this bore is 50 mm.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into cramped jigs and guards. Sensing is not included on this code: the magnet is the optional -S order code, and only with -S can CMSE or DMSE switches be mounted on the body slots. FA flange and LB foot mounts fit the standard ISO 21287 face, and a fixed TPU bumper at each end softens end-of-stroke impact.
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