Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 70mm 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
- Stroke70 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 ACEJ20X70-10
The ACEJ20X70-10 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw on the 20 mm bore body trims the 70 mm stroke by up to 10 mm, giving a usable range of 60-70 mm without changing the cylinder. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, and at 0.7 MPa those figures rise to 219.9 N and 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs, guards and small gantries. In practice, plan for roughly 94 N of real work at 0.5 MPa (about 0.6 of the push rating), which lifts about 8 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a hard-chrome plated S45C rod with a female M6x1.0 thread, fixed TPU bumpers at both ends, and speeds of 30-500 mm/s. The magnet is not fitted on this code; order the -S version if you want CMSE / DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 70 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 ACEJ20X70-10
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -10 | 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 ACEJ20X70-10 Is Used
Small-part press fitting
Pressing dowel pins or bushings into aluminium housings on an electronics assembly bench, where the 157.1 N push at 0.5 MPa is enough and the 60-70 mm trim range matches shallow part pockets.
Fixture stroke tuning
Clamping brackets or lids on a machining fixture where the final clamp position is tuned on site with the 10 mm stop screw instead of reordering a different stroke.
Compact gating on automation cells
Push-sorting small plastic caps or connector bodies on a conveyor diverter, where the short body saves about 50% of the mounting length of an ISO 15552 profile cylinder inside the guard.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X70-10 the Right Cylinder?
Size against neighbours: the 16 mm bore pushes 100.5 N at 0.5 MPa, while stepping up to 25 mm gives 245.4 N, so this 20 mm bore sits mid-range for light clamping and positioning. If your job needs a smaller or larger stroke, the 20 mm bore accepts standard strokes up to 100 mm. Mounting is via FA flange or LB foot on the ISO 21287 face, with I and Y rod knuckles available. Note the stop screw is a mechanical end stop for the extend stroke only - it does not lock the piston mid-stroke, and on air loss the rod will drift.
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 ACEJ20X70-10 FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa it pushes 219.9 N and pulls 164.9 N; theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with a 70 mm stroke adjustable down to 60 mm via the external stop screw, running on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-500 mm/s, port M5x0.8, female M6x1.0 rod thread, fixed TPU bumpers both ends.
The ISO 21287 compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits where a full-length cylinder will not. Sensing is not included on this code: the magnet is the optional -S order code, and only with -S can CMSE or DMSE switches be mounted on the body. FA flange and LB foot mountings bolt to the standard ISO 21287 face.
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