Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-30B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-30B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 50mm 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
- Stroke50 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 ACEJ12X50-30B
This is a double acting AirTAC ACEJ compact cylinder to ISO 21287, with a 12 mm bore and 50 mm stroke that an external stop screw trims down by up to 30 mm, giving a usable extend range of 20-50 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those figures rise to 79.2 N and 59.4 N, with a theoretical ceiling 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 a full-length body cannot reach.
Practical sizing: keep real work to roughly 34 N (about 60% of the push figure), which means this unit lifts about 2.9 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a hard-chromed S45C rod with a male thread (the B code), a fixed TPU bumper sits at both ends, and speed runs 30-500 mm/s on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi). Note the stop screw is a mechanical end stop only - on air loss the piston still drifts, so it never holds a load in place.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-30B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-30B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 50 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 ACEJ12X50-30B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 ACEJ12X50-30B Is Used
Micro part ejection
Ejects small machined pins or stamped contacts from a die, with the 20-50 mm adjustable range tuned per tooling change.
Lab sample indexing
Advances sample vials or slides one station on a compact benchtop analyzer where a full-length body will not fit.
Light snap-fit press
Presses battery covers or connector latches home on electronics assembly fixtures using the 56.5 N push force.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-30B the Right Cylinder?
At 56.5 N push (0.5 MPa) this 12 mm bore suits light clamping and small part positioning; if your load needs more, the 16 mm bore delivers 100.5 N and the 20 mm bore 157.1 N in the same compact family. Going smaller is rarely useful since 12 mm is the smallest ACEJ bore. The male rod thread (B code) bolts directly to your linkage, FA flange or LB foot mounts fit the ISO 21287 face, and if you later need position feedback, 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 ACEJ12X50-30B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa, 79.2 N push and 59.4 N pull; theoretical maximum is 11.5 kgf at 1.0 MPa. The -30 code sets a 30 mm adjustment window: an external stop screw shortens the 50 mm extend stroke on site, so the working range is 20-50 mm. It shortens the stroke only - it cannot extend past 50 mm - and it is an end stop, not a mid-stroke lock, so the piston still drifts if air is lost.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a 6 mm hard-chromed rod, M5x0.8 ports (PT thread), a fixed TPU bumper at each end, and FA flange or LB foot mounting. Sensors are not possible on this model as ordered: the magnet is the optional -S code, so order ACEJ12X50-30SB if you need CMSE / DMSE switch detection.
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