Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-20S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-20S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø16mm bore and 55mm 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.
- BoreØ16 mm
- Stroke55 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM4×0.7
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-20S
The ACEJ16X55-20S is a double acting ISO 21287 compact cylinder with a 16 mm bore and a 55 mm stroke that an external stop screw can trim anywhere in a 20 mm window, giving a usable extend range of 35-55 mm. At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa those figures rise to 140.7 N and 105.6 N, with a theoretical maximum of 20.5 kgf at 1.0 MPa. The hard-anodized aluminium body carries the S code, so the magnet is fitted and CMSE / DMSE reed or solid-state switches can be clamped straight into the body slots.
Because the short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, this 16 mm unit slots into slim fixtures, pick stations and guarding where a full-length body would overhang. Applying the 0.6 rule of thumb to the 100.5 N push leaves roughly 60 N of working force, which is about 6 kg of vertical lift capacity at 0.5 MPa - enough for small covers, inserts or test coupons. A fixed TPU bumper at each end absorbs end-of-stroke shock, the S45C hard-chrome rod is 8 mm, and speed runs 30-500 mm/s on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi).
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-20S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-20S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø16 mm |
| Stroke | 55 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 75 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 (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 101 N | 75 N |
| 0.7 MPa | 141 N | 106 N |
| Max (@1.0 MPa) | 21 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 ACEJ16X55-20S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×55 | 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 ACEJ16X55-20S Is Used
Small-part ejection from press dies
The 100.5 N push at 0.5 MPa clears stamped clips or terminals off a die face, while the 35-55 mm adjustable extend range lets the setter match the exact ejection distance without changing cylinders.
Sample clamping on lab test benches
About 6 kg of usable vertical force holds coupons or vials against a fixture, and the fitted -S magnet feeds CMSE switch signals to the PLC for cycle verification.
Carton flap tucking on packaging lines
The compact body fits inside tight guarding where an ISO 15552 profile cylinder would not, and the 20 mm trim window absorbs carton size changes on the same machine.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-20S the Right Cylinder?
Size down to the ACEJ12 (56.5 N push at 0.5 MPa) only for very light indexing; step up to the ACEJ20 (157.1 N push at 0.5 MPa) if your tooling needs about 50% more force or a 10 mm rod. Keep in mind the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock - on air loss the piston will still drift, so add a separate valve or lock for load holding. FA flange or LB foot mounts bolt to the ISO 21287 face, and I or Y rod knuckles suit the M4x0.7 female rod thread.
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 ACEJ16X55-20S FAQ
This 16 mm bore model pushes 100.5 N and pulls 75.4 N at 0.5 MPa, and 140.7 N / 105.6 N at 0.7 MPa, with a theoretical maximum of 20.5 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the -20 stop screw trims the 55 mm stroke by up to 20 mm, so the working range is 35-55 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, and the air port is M5x0.8 with an M4x0.7 female rod thread on the 8 mm rod.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits slim jigs and guarded stations. A fixed TPU bumper at each end absorbs end-of-stroke impact. 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. FA flange and LB foot mounts bolt straight to the standard face; the bore 16 max standard stroke is 75 mm.
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