Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-10B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-10B 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 ACEJ12X40-10B
The ACEJ12X40-10B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. A 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa (79.2 / 59.4 N at 0.7 MPa), which suits light clamping, ejecting and positioning in tight fixtures. The -10 code means an external stop screw trims the 40 mm stroke down by up to 10 mm on site, giving a usable extend range of 30-40 mm without changing the cylinder.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim jigs and guard spaces. A hard-anodized aluminium body runs on an S45C hard-chrome-plated 6 mm rod with a male thread (the B code), and a fixed TPU bumper absorbs end-of-stroke energy at both ends. Plan on roughly 34 N (about 3.4 kg of force) of real work at 0.5 MPa rather than the full 56.5 N rating, and expect about 2.8 kg of vertical lift capability with a 2:1 margin. Operating window: 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, -20 to +70 C, air filtered to 40 um.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-10B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-10B |
|---|---|
| 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 ACEJ12X40-10B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | 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 ACEJ12X40-10B Is Used
Small-part clamping
Clamps light aluminium or plastic brackets in electronics assembly jigs, where the 30-40 mm adjustable extend range matches varied part heights without swapping cylinders.
Fixture ejector
Ejects finished PCB carriers or small housings off a locating pin on a manual workbench, using about 34 N of usable push force at 0.5 MPa.
Slide pusher
Pushes small parts along a short transfer rail in a packaging or labelling station, where the compact body fits inside the machine guard.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-10B the Right Cylinder?
At this bore size the 12 mm unit gives 56.5 N push at 0.5 MPa; step up to a 16 mm bore for 100.5 N or down is not available, so 12 mm is the smallest ACEJ. The 40 mm stroke sits inside the 50 mm maximum standard stroke for this bore. The stop screw only shortens the extend stroke and does not lock the rod - on air loss the piston still drifts, so add a separate valve or clamp if the load must be held. No magnet is fitted on this model; order the -S version if CMSE / DMSE switches are needed later. FA flange or LB foot mounts and I/Y rod knuckles bolt to the ISO 21287 face.
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 ACEJ12X40-10B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa push rises to 79.2 N and pull to 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. It is double acting with a 12 mm bore, 40 mm stroke trimmed by a 10 mm stop-screw window (30-40 mm usable), M5x0.8 ports, a male-threaded 6 mm rod, 0.15-1.0 MPa (22-145 psi) operating pressure, 30-500 mm/s speed and a fixed TPU bumper at both ends.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, making it easy to fit in slim jigs and guarded spaces. Sensing is not possible on this exact code because no magnet is fitted; order the optional -S magnet version to run CMSE or DMSE reed or solid-state switches along the body slots.
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