Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 30mm 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.
- BoreØ12 mm
- Stroke30 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20SB
The ACEJ12X30-20SB is a double acting AirTAC compact cylinder built to ISO 21287, with a 12 mm bore and a 30 mm extend stroke that an external stop screw can trim anywhere in the ordered 20 mm window, giving a usable range of 10-30 mm. Air drives the rod in both directions, and a fixed TPU bumper at each end absorbs end-of-stroke impact. At 0.5 MPa it pushes with 56.5 N and pulls with 42.4 N, rising to 79.2 N push at 0.7 MPa.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so this 12 mm unit slips into slim fixtures, small pick heads and compact slides where a full-length body will not fit. As a rule of thumb, plan for roughly 34 N (about 3 kg equivalent) of real work at 0.5 MPa rather than the full 56.5 N rating; for vertical lifts that means it comfortably raises parts of around 1-2 kg with margin. The male rod thread (B code) suits quick-change tooling, and the fitted -S magnet lets CMSE / DMSE switches report end positions.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 30 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| 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 50 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 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 ACEJ12X30-20SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×30 | 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 ACEJ12X30-20SB Is Used
Micro part ejection
Ejects small machined pins or molded inserts from a fixture with 56.5 N push at 0.5 MPa, trimmed to a repeatable 10-30 mm extend stroke by the stop screw.
Compact pick-and-place head
The fitted -S magnet and CMSE / DMSE switches confirm extend and retract on a slim gantry head, while the male rod thread takes a quick-change gripper finger.
Lab sample press
Applies gentle, controlled pressure to vials or test coupons in benchtop equipment, lifting samples of about 1-2 kg vertically with margin at 0.5 MPa.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20SB the Right Cylinder?
For light clamping and sensing tasks in the 40-70 N band this 12 mm bore is the right class; if your load needs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa) or the 20 mm bore (157.1 N). Smaller duties in tight spaces can drop to the 10 mm class only where force is negligible, so 12 mm is usually the practical floor. Remember the stop screw only shortens the extend stroke - it is not a mid-stroke lock, so on air loss the piston can drift. Mounting: FA flange or LB foot brackets bolt to the ISO 21287 face, with I and Y rod knuckles available. The -S magnet on this model enables CMSE / DMSE switch mounting; order PT or G ports as 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 ACEJ12X30-20SB FAQ
At 0.5 MPa it delivers 56.5 N push and 42.4 N pull; at 0.7 MPa, 79.2 N push and 59.4 N pull. Theoretical maximum is 11.5 kgf at 1.0 MPa. The base stroke is 30 mm and the -20 code gives a 20 mm adjustment window, so the extend stroke can be set anywhere from 10 to 30 mm. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, and the port is M5x0.8.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why this 12 mm bore fits slim jigs and small slides. The B code gives a male rod thread for direct tooling attachment. The S code means the optional -S magnet is fitted on this model, so CMSE / DMSE reed or solid-state switches can be clamped to the body for position feedback; without -S there is no magnet. A fixed TPU bumper at each end absorbs end-of-stroke impact, and FA flange or LB foot mounting bolts straight to the ISO 21287 face.
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