Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50S 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 ACEJ20X80-50S
A double acting ISO 21287 compact cylinder, the ACEJ20X80-50S pairs a 20 mm bore with an 80 mm stroke and a 50 mm adjustment window. An external stop screw trims the extend stroke on site anywhere between 30 and 80 mm, so one cylinder serves several jig positions without re-plumbing. 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 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight guards and slide fixtures. Plan on roughly 94 N (about 9.6 kgf) of usable push at 0.5 MPa, enough to lift about 9 kg vertically with a 2:1 margin. This -S version carries the optional magnet, so CMSE / DMSE switches can be clipped on for end-of-stroke sensing, and a fixed TPU bumper sits at both ends.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50S |
|---|---|
| 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 ACEJ20X80-50S
| 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 ACEJ20X80-50S Is Used
Fixture clamping on CNC pallets
The 30-80 mm trim range lets one cylinder clamp short and tall pallets alike, with 157.1 N push at 0.5 MPa holding light workpieces.
Position-verified ejector on small assembly stations
With the fitted magnet and CMSE / DMSE switches, the 80 mm stroke is confirmed extended before the next station indexes.
Bottle-cap press in packaging lines
About 9 kg of vertical lift capacity at a 2:1 margin suits capping and light pressing, and the compact body fits under low guards.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-50S the Right Cylinder?
Size up if your load needs more than about 94 N of working force: the 25 mm bore delivers 245.4 N push at 0.5 MPa, while the 16 mm bore gives 100.5 N. Keep in mind the stop screw is a mechanical end stop only - on air loss the rod drifts, so do not rely on it to hold a load mid-stroke. FA flange or LB foot mounts bolt to the ISO 21287 face, and the fitted magnet accepts CMSE / DMSE switches when sensing is required.
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 ACEJ20X80-50S FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa, 219.9 N push and 164.9 N pull. The theoretical maximum is 32 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, and the port is M5x0.8 with a female M6x1.0 rod thread.
The -50 code means a 50 mm window: an external stop screw shortens the 80 mm extend stroke to any length from 30 to 80 mm without disassembly. It is a mechanical end stop, not a mid-stroke lock, so the rod can drift if air is lost. The hard-anodized aluminium body is about 50% shorter in mounting length than an ISO 15552 profile cylinder, fixed TPU bumpers absorb end-of-stroke shock, and the fitted -S magnet allows CMSE / DMSE switch mounting.
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