Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40 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 ACEJ12X50-40
The ACEJ12X50-40 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: a 12 mm bore, 50 mm stroke and a 40 mm adjustment window, so an external stop screw trims the extend stroke anywhere from 10 to 50 mm on site. 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 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, which is why it slots into small fixtures and sliding guards where a full-length body simply will not fit.
For sizing, plan on roughly 34 N of real work at 0.5 MPa (about 60% of the push figure), which corresponds to lifting around 3 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a roller-burnished bore, the 6 mm S45C rod is hard-chrome plated, and a fixed TPU bumper at each end absorbs end-of-stroke shock. Note that no magnet is fitted on this version; the optional -S code adds one so CMSE or DMSE switches can sense position. FA flange, LB foot and I/Y rod knuckles bolt straight to the ISO 21287 face.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40 |
|---|---|
| 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 ACEJ12X50-40
| 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 ACEJ12X50-40 Is Used
PCB fixture clamping
The 56.5 N push at 0.5 MPa is enough to hold small circuit boards in a test fixture, and the 10-50 mm adjustable range lets one cylinder serve several fixture depths.
Part presence ejection
On a small assembly line, the 50 mm stroke with a trimmed 10-50 mm window kicks undersized or missing parts off a conveyor without a full-length cylinder in the way.
Sample press in lab automation
Lifting about 3 kg vertically with a 2:1 margin, the 12 mm bore presses vial caps or micro-sample lids in compact analytical equipment where space is tight.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40 the Right Cylinder?
At 56.5 N push and 42.4 N pull at 0.5 MPa, this 12 mm bore suits light clamping, part presence checks and small eject actions. If your load needs more muscle, the 16 mm bore delivers 100.5 N push at 0.5 MPa; for lighter duties the same family starts even smaller. The 40 mm window means you can order one cylinder and dial the extend stroke between 10 and 50 mm instead of stocking several fixed lengths. Remember the stop screw is a mechanical end stop only: on air loss the piston drifts, so it is not a mid-stroke lock. Choose the female M3x0.5 rod thread as coded here, or add B for male thread, and order -S if you need switch sensing.
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 ACEJ12X50-40 FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa, 79.2 N push and 59.4 N pull; theoretical maximum 11.5 kgf at 1.0 MPa. Operating pressure is 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, air filtered to 40 um. The extend stroke is adjustable from 10 to 50 mm via the external stop screw within the 40 mm window, with 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, so it fits shallow pockets, guards and gantries. Sensing is not included as standard: this model has no magnet unless you order the optional -S code, which then allows CMSE or DMSE switches to ride the body slots. FA flange, LB foot and I/Y rod knuckles mount directly on the ISO 21287 face, and the rod end is female M3x0.5 with an M5x0.8 air port.
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