Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 50mm 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
- Stroke50 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 ACEJ12X50-40S
A double acting compact actuator built to ISO 21287, the ACEJ12X50-40S pairs a 12 mm bore with a 50 mm stroke that an external stop screw can trim anywhere in a 40 mm window, giving a usable extend range of 10-50 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 ceiling of 11.5 kgf at 1.0 MPa. Because the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, it slots into tight fixtures and guarding where a full-length body simply will not fit.
For sizing, treat roughly 34 N (0.6 of the push rating) as the practical working force at 0.5 MPa, which lifts 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 fixed TPU bumpers absorb end-of-stroke shock. The -S code on this model means the magnet is fitted, so CMSE / DMRE-free CMSE / DMSE switches can be clipped on for end-position sensing. Operating range is 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, and -20 to +70 C.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 50 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 ACEJ12X50-40S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 ACEJ12X50-40S Is Used
Small-part ejection from nests
The 10-50 mm adjustable extend range clears light plastic or stamped parts out of a machining or assembly nest, with 56.5 N of push at 0.5 MPa ample for grams-scale components.
Position-confirmed micro clamps
With the -S magnet fitted, CMSE / DMSE switches confirm clamp or release position on electronics assembly fixtures where the 12 mm bore's 34 N practical working force is enough.
Lab and test-rig actuation
Compact body and M5x0.8 ports make this a neat drop-in for bench-top test stations needing a repeatable 10-50 mm push stroke at 30-500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40S the Right Cylinder?
At 56.5 N push, this 12 mm bore suits light clamping, sorting and eject tasks; step down is not possible below 12 mm in this series, while the 16 mm bore offers 100.5 N push at 0.5 MPa if you need roughly double the force. The 40 mm adjustment window lets one cylinder serve several product widths on the same station. Remember the stop screw only shortens the extend stroke - it is not a mid-stroke lock, so the rod can drift if air is lost. Mount via FA flange or LB foot, and order CMSE or DMSE switches to suit the fitted -S 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 ACEJ12X50-40S FAQ
At 0.5 MPa the 12 mm bore delivers 56.5 N push and 42.4 N pull; at 0.7 MPa it reaches 79.2 N push and 59.4 N pull, with a theoretical maximum of 11.5 kgf at 1.0 MPa. Speed range is 30-500 mm/s on air filtered to 40 um, at 0.15-1.0 MPa (22-145 psi) and -20 to +70 C. The stop screw trims the 50 mm extend stroke anywhere within the 40 mm window (usable 10-50 mm).
The -S code means the optional magnet is fitted on this unit, so CMSE / DMSE reed or solid-state switches can be slid into the body slots for end-position signals. The hard-anodized aluminium compact body is about 50% shorter in mounting length than an ISO 15552 profile cylinder, and FA flange or LB foot mounts bolt straight to the ISO 21287 face. The rod end carries a female M3x0.5 thread and the air ports are M5x0.8.
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