Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40S
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40S is a genuine double acting, double rod, 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, double rod, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
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.
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, double rod, 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 kgf |
ACEJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
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 (double rod, 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
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 direct 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?
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
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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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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