Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X50-40
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X50-40 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø16mm bore and 50mm 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
- Stroke50 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 ACEJ16X50-40
This compact ISO 21287 cylinder is double acting and carries an adjustable extend stroke: the -40 stop screw trims the 50 mm stroke down by up to 40 mm on site, giving a usable range of 10-50 mm. At 0.5 MPa the 16 mm bore delivers 100.5 N on the push stroke and 75.4 N on the pull stroke, rising to 140.7 N push at 0.7 MPa. Because the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, it slots into tight jigs, small guarding frames and bench fixtures where a full-length body simply will not fit.
For part matching, treat roughly 60 N (about 0.6 of the push rating) as the practical working force at 0.5 MPa, which is enough to lift around 5 kg vertically with a 2:1 margin. The hard-anodized aluminium body with an S45C hard-chrome plated 8 mm rod resists wear in daily cycling, a fixed TPU bumper sits at both ends, and speeds of 30-500 mm/s cover most pick-and-place work. Note that this unit has no magnet fitted; the optional -S code is what enables CMSE / DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X50-40 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X50-40 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø16 mm |
| Stroke | 50 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 ACEJ16X50-40
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×50 | 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 ACEJ16X50-40 Is Used
Small-part clamping on assembly jigs
With about 60 N of practical push at 0.5 MPa, the 16 mm bore clamps connectors, terminals and small housings, while the 10-50 mm adjustable range lets technicians dial in the clamp position per fixture.
Light pick-and-place on benchtop cells
The vertical-lift equivalent is about 5 kg with a 2:1 margin, so the cylinder handles lightweight plastic parts or PCB trays, and the short body fits the low headroom above a bench conveyor.
Lab and test-rig actuation
The 10-50 mm trimmed stroke and 30-500 mm/s speed range suit small test stations that press buttons, operate sample holders or index micro-slides inside compact guarding.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X50-40 the Right Cylinder?
Size this bore when your load needs roughly 60 N of usable push at 0.5 MPa. If your work needs more, the 20 mm bore gives 157.1 N push at 0.5 MPa; if less, the 12 mm bore offers 56.5 N. The 40 mm adjustment window suits fixtures where the final extend position is tuned after installation, such as clamping soft or variable parts. Remember the stop screw is a mechanical end stop only: on air loss the piston drifts, so do not rely on it to hold a load mid-stroke. Mounting drops onto the standard ISO 21287 face with FA flange or LB foot options plus I and Y rod knuckles, and if you later need position feedback, 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 ACEJ16X50-40 FAQ
At 0.5 MPa it pushes with 100.5 N and pulls with 75.4 N; at 0.7 MPa push rises to 140.7 N, and the theoretical maximum is 20.5 kgf at 1.0 MPa. The -40 code means an external stop screw shortens the 50 mm extend stroke by up to 40 mm, so the working range is 10-50 mm. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), from -20 to +70 C at 30-500 mm/s.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits narrow jigs and guarding where longer bodies cannot. A fixed TPU bumper at each end absorbs end-of-stroke energy but never locks or holds a load. Mounting uses the standard ISO 21287 face with FA flange or LB foot options. Position sensing requires the optional -S magnet code; this model has no magnet fitted, so CMSE or DMSE switches only work when -S is ordered.
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