Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 80mm 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.
- BoreØ20 mm
- Stroke80 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50
The ACEJ20X80-50 is a double acting AirTAC compact cylinder built to ISO 21287, with a 20 mm bore and an 80 mm stroke that an external stop screw can trim anywhere in a 50 mm window, giving a usable extend range of 30-80 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N and 164.9 N, with a theoretical 32 kgf at 1.0 MPa. The hard-anodized aluminium body and hard-chrome S45C rod run at 0.15-1.0 MPa (22-145 psi) and 30-500 mm/s.
Because the short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, this 80 mm stroke unit slots into tight jigs and guarding where a full-length cylinder cannot. Plan on roughly 94 N (about 9.6 kgf) of real work at 0.5 MPa, which corresponds to lifting about 4.8 kg vertically with a 2:1 margin. A fixed TPU bumper at each end absorbs end-of-stroke energy, and the rod carries a female M6x1.0 thread with M5x0.8 ports.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 80 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 100 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | 165 N |
| Max (@1.0 MPa) | 32 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 ACEJ20X80-50
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 ACEJ20X80-50 Is Used
Fixture clamping with changeover trim
On a small CNC jig, the 50 mm window lets one cylinder serve several part variants: set the stop screw to 30-80 mm of extend stroke per family and re-clamp in seconds at 157.1 N push.
Light parts eject from a nest
Ejecting plastic caps or stamped clips under about 9.6 kgf of usable force at 0.5 MPa, with the 80 mm stroke shortened on site so the ejector clears the tool without overtravel.
Stop-and-present gate on a mini conveyor
A short-stroke gate that swings or lifts small cartons on a benchtop conveyor line, where the compact body fits under guarding and the trimmed stroke sets the gate angle exactly.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50 the Right Cylinder?
At 157.1 N push at 0.5 MPa, the 20 mm bore sits between the 16 mm bore (100.5 N) for lighter clamping and the 25 mm bore (245.4 N) when the load needs more margin. If your part weighs up to about 4.8 kg and you lift it vertically, this bore with a 2:1 margin is a sensible match; go to 25 mm for heavier fixtures. The -50 window suits families of parts where the extend stroke is set once per changeover, and FA flange or LB foot mounts plus I/Y rod knuckles bolt to the standard ISO 21287 face. If you need position sensing, order the -S variant so CMSE / DMSE switches can be fitted - this code has no magnet. Note the stop screw is an end stop only: on air loss the piston drifts, so do not treat it as a load-holding brake.
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 ACEJ20X80-50 FAQ
Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push is 219.9 N and pull 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the -50 code gives a 50 mm window, so the 80 mm stroke can be shortened to as little as 30 mm via the external stop screw. 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, port M5x0.8, female M6x1.0 rod thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it suits tight jigs and guarding. FA flange, LB foot and FTC brackets plus I/Y rod knuckles bolt to the standard face. A fixed TPU bumper at each end absorbs end-of-stroke energy but never locks or holds a load. Position sensing requires the optional -S magnet code; this model has no magnet, so CMSE / DMSE switches cannot be fitted unless you order the -S version.
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