Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 75mm 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
- Stroke75 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 ACEJ20X75-20
A double acting ISO 21287 compact cylinder, the ACEJ20X75-20 pairs a 20 mm bore with a 75 mm stroke that an external stop screw trims on site: the -20 code gives a 20 mm window, so the extend stroke can be set anywhere from 55 to 75 mm without changing hardware. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. Air supply is 0.15-1.0 MPa (22-145 psi) and rod speed runs 30-500 mm/s.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into slim fixtures, guarding and pick stations a full-length body cannot reach. The hard-anodized aluminium barrel carries a hard-chrome plated S45C rod, fixed TPU bumpers absorb end-of-stroke shock at both ends, and a rule of thumb for planning: expect roughly 94 N (about 9 kg vertical lift) of usable work at 0.5 MPa rather than the full rating. FA flange, LB foot and I/Y rod knuckles bolt to the standard face, and the optional -S magnet enables CMSE / DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 75 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 ACEJ20X75-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 ACEJ20X75-20 Is Used
Bench-top press fixture
The 157.1 N push at 0.5 MPa presses small terminals or dowels into plastic housings, and the 55-75 mm adjustable range lets one cylinder serve several die heights.
Packaging line reject pusher
Mounted beside a narrow conveyor guard, the short body kicks off-the-shelf cartons within a 75 mm stroke, trimmed down where the lane is tighter.
Lab sample lift station
With about 9 kg of practical vertical lift at 0.5 MPa, the cylinder raises sample trays in compact analytical equipment where mounting space is scarce.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20 the Right Cylinder?
At 157.1 N push at 0.5 MPa this 20 mm bore suits light clamping and part transfer. Step down to the 16 mm bore (100.5 N) for gentler ejection, or up to the 25 mm bore (245.4 N) when the load creeps toward 15 kg. Remember the stop screw is an end stop only: on air loss the piston drifts, so add a separate locking solution if the load must be held. Order the -S code if CMSE / DMSE position switches are planned, and pick FA or LB mounting plus a PT or G port thread when specifying.
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 ACEJ20X75-20 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 the theoretical maximum is 32 kgf at 1.0 MPa. The 75 mm extend stroke is trimmed by up to 20 mm via the stop screw (usable 55-75 mm). 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, port M5x0.8, female rod thread M6x1.0, and the stroke is adjustable on the extend side only.
The ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow fixtures and guarded gantries. A fixed TPU bumper at each end absorbs end-of-stroke impact. Sensing requires the optional -S magnet ordered with the cylinder; this unit has no magnet, so CMSE or DMSE switches cannot be mounted unless -S is specified. FA flange, LB foot and I/Y rod knuckles attach to the standard ISO 21287 face.
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