Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X20-20
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X20-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø16mm bore and 20mm 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
- Stroke20 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 ACEJ16X20-20
A double acting ISO 21287 compact cylinder with an adjustable extend stroke, the ACEJ16X20-20 pairs a 16 mm bore with a 20 mm stroke and a 20 mm adjustment window. At 0.5 MPa it pushes 100.5 N and pulls 75.4 N, enough for light clamping and positioning in tight fixtures. The external stop screw trims the extend stroke anywhere from 0 to 20 mm on site, so one cylinder covers several jig variants.
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 guards and gantries. A hard-anodized aluminium body carries an S45C hard-chrome plated 8 mm rod, with a fixed TPU bumper at each end. For vertical work, plan on roughly 60 N of usable push at 0.5 MPa, which lifts about 6 kg; halve that for a 2:1 margin. Sensors need the optional -S magnet code, ordered with CMSE or DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X20-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X20-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø16 mm |
| Stroke | 20 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 ACEJ16X20-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×20 | 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 ACEJ16X20-20 Is Used
Small-part press fitting
Seating pins or bushings into plastic housings on an electronics assembly bench, where the 0-20 mm trimmed stroke matches shallow press depths and about 60 N of usable force at 0.5 MPa.
Compact jig clamping
Clamping thin aluminium brackets inside a welding or machining fixture where the short body, roughly half the length of an ISO 15552 profile cylinder, is the only way to fit between the jaws.
Sorted ejection with detection
Kicking rejected vials off a pharma conveyor lane; order the -S magnet version so CMSE or DMSE switches confirm each extend stroke at the trimmed end position.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X20-20 the Right Cylinder?
At 100.5 N push (0.5 MPa) this 16 mm bore suits light clamps and small part ejection. Step down to the 12 mm bore (56.5 N push) for gentler forces, or up to 20 mm (157.1 N push) when the load grows. The stop screw is a mechanical end stop only: on air loss the rod still drifts, so do not treat it as a load lock. FA flange or LB foot mounting bolts to the standard ISO 21287 face; add the -S code if CMSE / DMSE position sensing is needed.
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 ACEJ16X20-20 FAQ
Push is 100.5 N and pull 75.4 N at 0.5 MPa; at 0.7 MPa push rises to 140.7 N and pull to 105.6 N, with a theoretical maximum of 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, fluid air filtered to 40 um. The extend stroke is adjustable from 0 to 20 mm via the external stop screw, and the air port is M5x0.8.
The -20 code sets a 20 mm adjustment window: an external stop screw shortens the 20 mm extend stroke by up to 20 mm, giving a usable range of 0-20 mm without changing the cylinder. A fixed TPU bumper at each end absorbs end-of-stroke energy. Position sensing is not included by default; order the optional -S magnet code to enable CMSE or DMSE switches, and note the stop screw is an end stop, not a mid-stroke lock.
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