Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 ACEJ20X80-30B
A double acting ISO 21287 compact cylinder with a trimmable extend stroke, the ACEJ20X80-30B pairs a 20 mm bore with an 80 mm stroke and a 30 mm adjustment window. An external stop screw shortens the extend stroke on site anywhere in the 50-80 mm range, so one cylinder covers several jig positions without re-ordering. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight guards and slide fixtures where a full-length body will not fit.
The hard-anodized aluminium body carries a hard-chrome plated S45C rod with a male thread (the B code), and fixed TPU bumpers absorb end-of-stroke shock at both ends. Speed runs 30-500 mm/s on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi). For sizing, treat roughly 94 N (about 0.6 of the push force) as the practical working effort, which lifts around 9 kg vertically with a 2:1 margin. FA flanges, LB feet and I/Y rod knuckles bolt straight to the ISO 21287 face. No magnet is fitted; order the -S version if you need CMSE / DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 80 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 ACEJ20X80-30B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -30 | 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 ACEJ20X80-30B Is Used
Small parts press-fit station
The 157.1 N push at 0.5 MPa seats bearings or bushings into aluminium housings, and the 50-80 mm adjustable range lets one cylinder serve housings of different depths.
Packaging line product stopper
A pop-up stop on a snack-food conveyor uses the 117.8 N pull stroke to retract quickly, with the stop screw tuned on site to match the product pitch.
Lab sample indexing slide
The short body fits inside a benchtop analyzer enclosure, advancing sample trays 50-80 mm at 30-500 mm/s between test positions.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X80-30B the Right Cylinder?
Compare both directions before locking the bore: the 16 mm size gives only 100.5 N push at 0.5 MPa, while stepping up to 25 mm raises it to 245.4 N - if your mechanism sits near the 94 N practical limit of this bore, the 25 mm buys margin cheaply. Remember the stop screw trims the extend stroke only; it never lengthens it past 80 mm and it is not a mid-stroke lock, so the rod still drifts if air is lost. Specify LB foot or FA flange mounting to suit the fixture, and add the -S magnet code at order time if CMSE / DMSE position switches are planned later.
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 ACEJ20X80-30B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push rises to 219.9 N. The theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with an 80 mm stroke adjustable down to 50 mm via the stop screw, a 10 mm male-thread rod, M5x08 ports written M5x0.8, 0.15-1.0 MPa (22-145 psi) operating pressure and 30-500 mm/s speed.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow fixtures and guarded slides. Fixed TPU bumpers at both ends absorb end-of-stroke shock. FA flange and LB foot mountings plus I/Y knuckles bolt to the standard face. Sensing needs the optional -S magnet ordered with the cylinder - this version has no magnet, so CMSE / DMSE switches cannot be fitted unless you choose -S.
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