Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50S 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 ACEJ12X50-50S
The ACEJ12X50-50S is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 50 mm stroke anywhere in the 0-50 mm window, so one cylinder serves several fixture positions. At 0.5 MPa this 12 mm bore pushes 56.5 N and pulls 42.4 N, rising to 79.2 N push at 0.7 MPa - enough for light clamping, ejecting and sorting tasks. The -S code means the magnet is fitted, so CMSE or DMSE reed and solid-state switches can be mounted anywhere along the body slots.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which matters in slim pick-and-place heads and guarded cells. A hard-anodized aluminium body carries an S45C hard-chrome-plated 6 mm rod with a female M3x0.5 thread, and fixed TPU bumpers at both ends absorb end-of-stroke shock. As a sizing rule of thumb, plan on roughly 34 N of real work at 0.5 MPa (about 60% of the push rating), which corresponds to lifting around 3 kg vertically with margin - match that to your part weight before ordering.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50S |
|---|---|
| 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 ACEJ12X50-50S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -50 | 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 ACEJ12X50-50S Is Used
Micro part ejection
Ejecting small machined pins or stamped terminals from a nest: the 56.5 N push at 0.5 MPa clears light parts, and the 0-50 mm adjustable window lets you tune the eject travel per die without changing cylinders.
Position-verified gating
A light gate or diverter on a conveyor for electronic components: with the fitted -S magnet, CMSE / DMSE switches confirm extend and retract, while the compact body fits where a full-length cylinder cannot.
Lab and test fixture actuation
Pressing probes or sample holders in a small test rig: the 3 kg vertical-lift equivalent covers light loads, the M5x0.8 ports suit compact manifolds, and the stop screw sets exact probe depth.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50S the Right Cylinder?
Size up if your load needs more than about 34 N of usable force: the 16 mm bore delivers 100.5 N push at 0.5 MPa, and the 20 mm bore reaches 157.1 N. Stay with this 12 mm model for light ejection, gating and sensor-checked micro positioning where space is tighter than the force budget. Note that the stop screw only shortens the extend stroke - it is a mechanical end stop, not a mid-stroke lock, so the piston still drifts if air is lost. Mounting options include FA flange and LB foot, with I or Y rod knuckles; the fitted -S magnet accepts CMSE / DMSE switches for end-of-stroke signalling. Air supply: 0.15-1.0 MPa (22-145 psi), filtered to 40 um, speed 30-500 mm/s.
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 ACEJ12X50-50S FAQ
This 12 mm bore model pushes 56.5 N and pulls 42.4 N at 0.5 MPa, and pushes 79.2 N (pull 59.4 N) at 0.7 MPa, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The ordered stroke is 50 mm and the -50 stop screw trims the extend stroke anywhere in a 0-50 mm window. It is double acting, runs at 30-500 mm/s on 0.15-1.0 MPa (22-145 psi) air, and carries a 1.5 MPa (215 psi) proof rating.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarded assemblies. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clipped into the body slots for position feedback. It bolts to FA flange or LB foot mounts, takes I or Y rod knuckles on the M3x0.5 female rod thread, and fixed TPU bumpers at both ends absorb end-of-stroke impact.
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