Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20 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 ACEJ20X80-20
The ACEJ20X80-20 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 80 mm stroke by up to 20 mm on site, giving a usable range of 60-80 mm without swapping the cylinder. At 0.5 MPa the 20 mm bore delivers 157.1 N push and 117.8 N pull, rising to 219.9 N push at 0.7 MPa, which suits light clamping, positioning and eject tasks in tight machine frames.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim jigs and guarded stations. A rule of thumb: plan on roughly 94 N of real work at 0.5 MPa, and expect it to lift about 8 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a S45C hard-chrome rod, fixed TPU bumpers at both ends, and the optional -S magnet code enables CMSE / DMSE switches (this unit has no magnet fitted).
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20 |
|---|---|
| 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 ACEJ20X80-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -20 | 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 ACEJ20X80-20 Is Used
Small-part clamping on rotary tables
The 60-80 mm adjustable stroke lets a fixture builder dial in clamp travel for 40-60 mm aluminum brackets, using about 94 N of usable clamp force at 0.5 MPa.
Product push-off at packaging stations
With 157.1 N push at 0.5 MPa and 30-500 mm/s speed, the 20 mm bore nudges cartons or blister packs off a narrow conveyor where a full-length body will not fit.
Sample lift in compact lab automation
The vertical-lift equivalent of about 8 kg with a 2:1 margin matches microplate stacks and sample trays inside space-limited analyzer enclosures.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-20 the Right Cylinder?
Size both ways before ordering: the 16 mm bore gives 100.5 N push at 0.5 MPa if your load is lighter, while the 25 mm bore reaches 245.4 N for heavier clamps. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock - on air loss the rod still drifts, so add a separate valve or lock for load holding. Mounting drops into standard ISO 21287 fixtures via FA flange or LB foot, with I and Y rod knuckles on the M6x1.0 female thread; order the -S code if you need magnet-based 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 ACEJ20X80-20 FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push is 219.9 N and pull 164.9 N; theoretical maximum is 32 kgf at 1.0 MPa. The base stroke is 80 mm and the -20 code gives a 20 mm adjustment window, so the extend stroke can be trimmed anywhere from 60 to 80 mm with 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, and the port is M5x0.8.
It is an ISO 21287 compact cylinder with a hard-anodized aluminium body and S45C hard-chrome plated rod, about 50% shorter in mounting length than an ISO 15552 profile cylinder, with fixed TPU bumpers at both ends to absorb end-of-stroke energy. Sensing is not included by default: the magnet is the optional -S code, and only when ordered can CMSE / DMSE switches be mounted in the body slots. This version (no S) has no magnet, so no switch can be fitted.
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