Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40 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 ACEJ16X55-40
This is a double acting AirTAC ACEJ compact cylinder built to ISO 21287, with a 16 mm bore and a 55 mm stroke that an external stop screw trims on site. The -40 code gives a 40 mm adjustment window, so the extend stroke can be set anywhere from 15 mm up to the full 55 mm. At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa those rise to 140.7 N and 105.6 N, with a theoretical 20.5 kgf at 1.0 MPa. The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight jigs and guarding where a full-length body will not fit.
In practice, plan for roughly 60 N (about 6 kgf) of real work at 0.5 MPa instead of the full 100.5 N rating, and expect it to lift about 5 kg vertically once a 2:1 margin is applied. The hard-anodized aluminium body carries an S45C hard-chrome rod, a fixed TPU bumper sits at both ends, and speed runs 30-500 mm/s over 0.15-1.0 MPa (22-145 psi) of clean, 40 um filtered air. Note that no magnet is fitted on this version: the optional -S code is what enables CMSE / DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40 |
|---|---|
| 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 ACEJ16X55-40
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×55 | 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 ACEJ16X55-40 Is Used
Small-part ejection from stamping dies
The 100.5 N push at 0.5 MPa clears finished 20-40 mm components off a die face, and the 15-55 mm adjustable stroke adapts the throw when die sets change.
Sample vial indexing on lab automation
Female M4x0.7 rod thread takes a custom pusher to advance vials one station at a time; the compact body fits inside a benchtop enclosure where an ISO 15552 profile cylinder would overhang.
Carton flap hold-down on a case packer
About 60 N of usable force at 0.5 MPa holds flaps while tape is applied, with the stop screw set to match shallow carton heights without changing cylinders.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X55-40 the Right Cylinder?
At 100.5 N push (0.5 MPa) this 16 mm bore suits light clamping and positioning; step down to a 12 mm bore (56.5 N) for smaller loads or up to a 20 mm bore (157.1 N) when parts run heavier. The 55 mm stroke with a 40 mm window covers 15-55 mm, handy when one cylinder serves several product widths. Remember the stop screw is an end stop only: on air loss the piston drifts, so it is not a load-holding brake. FA flange or LB foot mountings bolt to the ISO 21287 face, and if position feedback matters, order the -S variant so CMSE / DMSE switches can be fitted.
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 ACEJ16X55-40 FAQ
At 0.5 MPa it pushes 100.5 N and pulls 75.4 N; at 0.7 MPa, 140.7 N push and 105.6 N pull; theoretical maximum is 20.5 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, temperature -20 to +70 C, air filtered to 40 um. The extend stroke is adjustable from 15 to 55 mm via the 40 mm window.
An external stop screw shortens the extend stroke by up to 40 mm within the ordered window, so you can set any stroke from 15 mm to the full 55 mm; the fixed TPU bumpers at both ends absorb end-of-stroke energy. This version ships without a magnet, so no sensor can be read from it; specify the optional -S magnet code if you need CMSE or DMSE switches. FA flange and LB foot mountings fit the ISO 21287 mounting face, and the female M4x0.7 rod thread accepts standard knuckles.
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