Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 45mm 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
- Stroke45 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 ACEJ12X45-40
The ACEJ12X45-40 is a double acting compact cylinder built to ISO 21287, with a 12 mm bore and a 45 mm stroke that an external stop screw trims anywhere in a 40 mm window, giving a usable extend range of 5-45 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, 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, so it slots into slim fixtures and guarded cells.
Plan on roughly 34 N of real work at 0.5 MPa (about 60% of the rated push) and expect it to lift about 2.9 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a hard-chrome plated S45C rod, fixed TPU bumpers sit at both ends, and the rod ends in a female M3x0.5 thread with an M5x0.8 air port. Speed range is 30-500 mm/s across 0.15-1.0 MPa (22-145 psi). Note that no magnet is fitted; the optional -S code adds one for CMSE / DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 45 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 ACEJ12X45-40
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×45 | Stroke length in mm. |
| -40 | 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 ACEJ12X45-40 Is Used
Micro part ejection
Trims its 45 mm extend stroke down to 5 mm to eject tiny machined pins from a fixture, with 56.5 N of push at 0.5 MPa clearing the nest each cycle.
Compact jig clamping
The short ISO 21287 body fits inside a slim drill jig where a full-length profile cylinder would not, delivering about 34 N of usable clamp force at 0.5 MPa.
Small assembly press
Presses snap-fit connectors home with 79.2 N at 0.7 MPa; order the -S magnet code so CMSE / DMSE switches confirm each completed stroke.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40 the Right Cylinder?
For light clamping and positioning in cramped spaces, this 12 mm bore suits loads in the 30-55 N band at 0.5 MPa. Step up to the 16 mm bore (100.5 N push at 0.5 MPa) when parts get heavier, or drop to a smaller fixed-stroke ACE if the 40 mm trim window is not needed. The stop screw sets extend length only - it is a mechanical end stop, so on air loss the piston still drifts and cannot hold a load mid-stroke. FA flange or LB foot mounts bolt to the ISO 21287 face, and ordering the -S variant enables CMSE / DMSE position switches.
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 ACEJ12X45-40 FAQ
This 12 mm bore model pushes 56.5 N and pulls 42.4 N at 0.5 MPa, and 79.2 N / 59.4 N at 0.7 MPa, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The extend stroke is adjustable from 5-45 mm via the 40 mm stop-screw window. It runs on air filtered to 40 um at 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, with an M5x0.8 port and female M3x0.5 rod thread.
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 tight guards and gantries. FA flange and LB foot mounts bolt straight to the standard face, and fixed TPU bumpers absorb end-of-stroke energy at both ends. There is no magnet fitted as supplied; add the optional -S code to enable CMSE / DMSE reed or solid-state switches.
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