Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 30mm 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
- Stroke30 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 ACEJ12X30-20
The ACEJ12X30-20 is a double acting AirTAC compact cylinder built to ISO 21287, with a 12 mm bore and a 30 mm stroke that an external stop screw can trim by up to 20 mm, giving a usable extend range of 10-30 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those figures rise to 79.2 N and 59.4 N. Its short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures, small guarding and bench-top tooling where a full-length body simply will not fit.
For sizing in practice, treat roughly 34 N (about 0.6 of the 0.5 MPa push) as the realistic working force, which corresponds to lifting about 2.9 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a hard-chrome plated S45C rod with a female M3x0.5 thread, and a fixed TPU bumper at each end absorbs end-of-stroke impact. Air supply is 0.15-1.0 MPa (22-145 psi) filtered to 40 um, speed runs 30-500 mm/s, and the rod retracts as well as extends under air pressure.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 30 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 ACEJ12X30-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×30 | Stroke length in mm. |
| -20 | 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 ACEJ12X30-20 Is Used
Small-part ejection from micro molds
The 56.5 N push at 0.5 MPa is enough to strip tiny molded clips or connector pins off a micro mold, and the 10-30 mm adjustable range lets the operator set the eject point without changing hardware.
Light clamping on PCB test fixtures
With about 34 N of realistic working force, this cylinder clamps circuit boards or small sensor housings against a nest during functional testing, and the compact body fits inside the fixture frame.
Push-off station on a small assembly bench
Used to nudge finished components off a pallet or nest into a chute; the short ISO 21287 body keeps the station footprint tight, and the fixed TPU bumpers quiet the return stroke at 30-500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20 the Right Cylinder?
At the 12 mm bore you get 56.5 N push at 0.5 MPa; if your load needs more, step up to the 16 mm bore (100.5 N at 0.5 MPa) or the 20 mm bore (157.1 N). If 56.5 N is generous for the job, there is no smaller bore in this series, so this is the entry size. The -20 window suits applications where the final position is tuned on the machine, such as clamping light plastic housings. Note the stop screw sets the extend end position only; it is not a mid-stroke lock, so on air loss the piston can still drift. Mounting: FA flange or LB foot, plus I/Y rod knuckles. This unit has no magnet; if you later need CMSE or DMSE switches, order the -S version to get the optional magnet.
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 ACEJ12X30-20 FAQ
At 0.5 MPa the 12 mm bore 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. The ordered stroke is 30 mm and the -20 stop screw trims the extend stroke by up to 20 mm, so the usable extend range is 10-30 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 and the rod end is a female M3x0.5 thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it fits slim jigs and bench fixtures. It bolts to FA flange or LB foot mounts and accepts I/Y rod knuckles on the M3x0.5 female thread. A fixed TPU bumper at each end absorbs end-of-stroke impact. This particular unit has no magnet, so no switch can be fitted to it; to sense position with CMSE or DMSE switches, order the variant with the optional -S magnet code.
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