Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 35mm 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
- Stroke35 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 ACEJ12X35-20
A double acting compact actuator built to ISO 21287, the ACEJ12X35-20 uses a 12 mm bore to deliver 56.5 N of push force and 42.4 N of pull at 0.5 MPa (rising to 79.2 N at 0.7 MPa). An external stop screw trims the 35 mm extend stroke by up to 20 mm, giving a usable range of 15-35 mm without changing the air supply. The hard-anodized aluminium body is about 50% shorter in mounting length than an ISO 15552 profile cylinder, so it slots into slim fixtures where a full-length body will not fit.
For sizing, plan on roughly 33.9 N (about 3.4 kg of real work) at 0.5 MPa rather than the full rating, which keeps a sensible margin. In vertical terms the bore lifts about 5.8 kg theoretically, or roughly 2.9 kg with a 2:1 margin. The 6 mm S45C hard-chrome rod ends in a female M3x0.5 thread, the air port is M5x0.8, and a fixed TPU bumper at each end absorbs end-of-stroke impact. Speed range is 30-500 mm/s.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 35 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 ACEJ12X35-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×35 | 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 ACEJ12X35-20 Is Used
Micro part ejection
Ejects finished watch or connector pins from a small press die, with the 15-35 mm adjustable range tuned to the die depth and 56.5 N enough for light parts.
Compact gating on test rigs
Swings or stops small PCB carriers on an automated test line; add the -S magnet option and CMSE / DMSE switches to confirm gate position in tight space.
Light hold-down clamping
Clamps thin aluminium brackets during a screwdriving step, using about 33.9 N of usable force at 0.5 MPa so delicate surfaces are not marked.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X35-20 the Right Cylinder?
At 56.5 N push, this 12 mm bore suits light clamping, ejecting and positioning of small parts. Step down is not available in this series, so if the load needs more force, the 16 mm bore gives 100.5 N push at 0.5 MPa, and the 20 mm bore reaches 157.1 N. Both keep the same M5x0.8 port and compact footprint family. Remember the stop screw only shortens the extend stroke within the 20 mm window; it is a mechanical end stop, not a mid-stroke lock, so the rod can drift if air is lost. If you need position sensing, order the -S variant to add the optional magnet for CMSE / DMSE switches; this non-S model carries no 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 ACEJ12X35-20 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. The theoretical maximum is 11.5 kgf at 1.0 MPa. The ordered stroke is 35 mm and the -20 stop screw trims the extend stroke by up to 20 mm, so the working range is 15-35 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, port M5x0.8, rod thread female M3x0.5.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it fits slim slides and guarded assemblies. A fixed TPU bumper at each end absorbs end-of-stroke impact. FA flange and LB foot mounts plus I and Y rod knuckles bolt to the standard face. Position sensing requires the optional -S magnet code; with it, CMSE or DMSE switches can be fitted anywhere along the body slots.
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