Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40S 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 ACEJ20X80-40S
A double acting compact cylinder with an adjustable extend stroke, the ACEJ20X80-40S pairs a 20 mm bore with an 80 mm stroke and a 40 mm trim window: an external stop screw shortens the extend stroke on site anywhere in the 40-80 mm range. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa. The hard-anodized aluminium body keeps the mounting length about 50% shorter than an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body will not fit.
The -S code on this model means the magnet is fitted, so CMSE or DMSE reed and solid-state switches can be clipped onto the body slots for end-of-stroke signalling. A fixed TPU bumper at each end absorbs end-of-stroke energy, and the S45C hard-chrome rod carries a female M6x1.0 thread. As a rule of thumb, plan on roughly 94 N (about 9.6 kg of force) of usable work at 0.5 MPa, which is a vertical lift of about 8 kg with a 2:1 margin.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40S |
|---|---|
| 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 ACEJ20X80-40S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 ACEJ20X80-40S Is Used
Fixture clamping on CNC jigs
The 40-80 mm trim range lets one cylinder clamp both short and tall workpieces on a machining jig, with 157.1 N of push at 0.5 MPa holding light steel parts.
Reject pusher on packaging lines
Mounted with an FA flange beside a conveyor, the 80 mm stroke kicks off-spec cartons sideways, and the fitted magnet with a DMSE switch confirms each push completed.
Sample lift in lab automation
With about 8 kg of vertical lift capacity at a 2:1 margin, the 20 mm bore raises microplate stacks and sample trays inside compact analyser enclosures.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-40S the Right Cylinder?
At this bore size the 20 mm unit gives 157.1 N push at 0.5 MPa; step down to a 16 mm bore (100.5 N) for lighter pick-and-place, or up to 25 mm (245.4 N) if the load grows. The 40 mm window suits stations where one cylinder length serves several product variants. Note that the stop screw is a mechanical end stop for the extend stroke only - on air loss the piston can still drift, so it is not a mid-stroke lock. FA flange or LB foot mounting bolts to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches.
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 ACEJ20X80-40S FAQ
Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push rises to 219.9 N, and the theoretical maximum is 32 kgf at 1.0 MPa. The extend stroke is adjustable from 40 to 80 mm via the external stop screw (-40 window). 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, and the air supply should be filtered to 40 um.
The body is a hard-anodized aluminium ISO 21287 compact design about 50% shorter in mounting length than an ISO 15552 profile cylinder, with a fixed TPU bumper at each end to absorb end-of-stroke energy. Because this model carries the -S code, the magnet is fitted and CMSE / DMSE reed or solid-state switches can be mounted in the body slots; on models ordered without -S there is no magnet. FA flange and LB foot mounts bolt straight to the standard face.
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