Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-20
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-20 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 45mm 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
- Stroke45 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 ACEJ12X45-20
The ACEJ12X45-20 is a double acting compact cylinder built to ISO 21287, with a 12 mm bore and a 45 mm stroke that an external stop screw trims on site by up to 20 mm, giving a usable extend range of 25-45 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N / 59.4 N at 0.7 MPa, with a theoretical peak of 11.5 kgf at 1.0 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarding where a full-length body will not fit.
Plan on roughly 34 N (about 3.4 kg of force) of real work at 0.5 MPa instead of the full 56.5 N rating, which keeps a sensible margin for friction and side loads. The hard-anodized aluminium body carries a S45C hard-chrome plated 6 mm rod, fixed TPU bumpers absorb end-of-stroke shock at both ends, and the rod ends in a female M3x0.5 thread with PT ports. Speed range is 30-500 mm/s across 0.15-1.0 MPa (22-145 psi) of clean, 40 um filtered air.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 45 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 ACEJ12X45-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 ACEJ12X45-20 Is Used
Micro part ejection from press dies
The 25-45 mm adjustable extend range lets a toolmaker dial the exact eject length for small stamped connectors, with 56.5 N of push at 0.5 MPa enough to clear light aluminium offcuts.
Compact gate latch on lab automation
Its body is about 50% shorter than an ISO 15552 profile cylinder, so the 12 mm bore slides inside tight guarding on a sample-handling gate, retracting 42.4 N against a light latch spring.
Small parts presence check fixture
Order the -S magnet version and CMSE or DMSE switches confirm rod position on a gauge jig checking PCB connector seating, using the stop screw to trim the probe stroke within the 20 mm window.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-20 the Right Cylinder?
For light clamping and positioning in the 30-60 N class at 0.5 MPa, the 12 mm bore is the smallest ACEJ option; step up to bore 16 (100.5 N push at 0.5 MPa) when loads grow, or drop nothing smaller exists below it. Note that the stop screw only shortens the extend stroke - it is a mechanical end stop, not a mid-stroke lock, so the rod can drift if air is lost. FA flange and LB foot mountings bolt to the standard ISO 21287 face, and if position feedback is needed later, order the -S variant so CMSE / DMSE switches can be fitted; this model has no magnet 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 ACEJ12X45-20 FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those rise to 79.2 N and 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The 12 mm bore runs double acting on 0.15-1.0 MPa (22-145 psi) air, 30-500 mm/s, with a 45 mm stroke adjustable down to 25 mm via the -20 stop screw and an M5x0.8 port.
It is an ISO 21287 compact cylinder with a hard-anodized aluminium body, S45C hard-chrome rod, female M3x0.5 rod thread and fixed TPU bumpers at both ends that only soften the stroke ends - they never hold a load. Mounting uses FA flange or LB foot on the standard face. Position sensing requires the optional -S magnet code; this model has no magnet, so no CMSE / DMSE switch can be mounted on it.
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