Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30B 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 ACEJ12X40-30B
The ACEJ12X40-30B is a double acting AirTAC compact cylinder built to ISO 21287, with a 12 mm bore and a 40 mm stroke that an external stop screw can trim anywhere in a 30 mm window, giving a usable extend range of 10-40 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those rise to 79.2 N and 59.4 N, with a theoretical ceiling 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 a full-length body cannot reach.
Plan on roughly 34 N of real work at 0.5 MPa (about 0.6 of the push rating), which corresponds to lifting about 3 kg vertically with a 2:1 margin. The B code gives a male 6 mm hard-chrome S45C rod, the port is M5x0.8, and fixed TPU bumpers absorb end-of-stroke shock at both ends. Note there is no magnet fitted on this version; the optional -S code is what enables CMSE / DMSE switch sensing. Speed range is 30-500 mm/s.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30B |
|---|---|
| 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 ACEJ12X40-30B
| 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 ACEJ12X40-30B Is Used
Micro part ejection
Ejects small stamped terminals or plastic caps from a die or nest, with the 10-40 mm adjustable extend range tuned on the machine to match each part.
Light fixture clamping
Clamps thin PCBs or bracket workpieces in an electronics assembly jig where the short ISO 21287 body must fit inside a compact fixture frame.
Small gate or chute diverting
Swings a lightweight diverter flap on a packaging line at 30-500 mm/s; add the -S magnet code if CMSE / DMSE end-position switches are wanted later.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30B the Right Cylinder?
At 56.5 N push at 0.5 MPa this 12 mm bore suits light clamping and positioning; step down is not available in this series, while a 16 mm bore (100.5 N push at 0.5 MPa) is the next size up if you need nearly double the force. The stop screw is a mechanical end stop for the extend stroke only - it does not hold a load if air is lost, so add a separate locking solution for suspended loads. FA flange or LB foot mounts and I/Y rod knuckles bolt to the standard ISO 21287 face; order the -S variant if position sensing will ever be needed.
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 ACEJ12X40-30B FAQ
Push is 56.5 N and pull 42.4 N at 0.5 MPa; at 0.7 MPa push is 79.2 N and pull 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. The 40 mm stroke is adjustable down to 10 mm via the 30 mm stop-screw window. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, port M5x0.8, male rod thread, rod 6 mm.
It is an ISO 21287 compact cylinder with a hard-anodized aluminium body, threaded aluminium covers, a hard-chrome plated S45C rod and fixed TPU bumpers at both ends - about 50% shorter in mounting length than an ISO 15552 profile cylinder. Switches are possible only with the optional -S magnet code, which allows CMSE / DMSE sensors; this model has no magnet fitted. FA flange and LB foot mounts plus I/Y knuckles fit the standard face.
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