Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50B 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 ACEJ12X50-50B
The ACEJ12X50-50B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. Its 12 mm bore delivers 56.5 N push and 42.4 N pull at 0.5 MPa, rising to 79.2 N push at 0.7 MPa, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The hard-anodized aluminium body carries magnet slots, and the S45C hard-chrome plated rod ends in a male thread (the B code) for direct tooling attachment.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into compact clamping fixtures and small automation cells. The -50 code gives a 50 mm adjustment window: an external stop screw trims the 50 mm extend stroke down on site, so the usable range is 0-50 mm without changing the cylinder. As a sizing rule of thumb, plan on roughly 34 N (about 3 kg of vertical lift with a margin) of real work at 0.5 MPa rather than the full 56.5 N rating. Fixed TPU bumpers absorb end-of-stroke shock at both ends.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50B |
|---|---|
| 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 ACEJ12X50-50B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -50 | 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 ACEJ12X50-50B Is Used
Micro clamping of small parts
Holds tiny brackets or PCB fixtures in a machining jig, with the 0-50 mm adjustable stroke tuned to each part and about 34 N of usable force at 0.5 MPa.
Light part ejection from molds
Ejects small injection-molded caps or connectors where the 56.5 N push at 0.5 MPa is enough and the short body fits tight mold space.
Adjustable test-rig actuation
Presses sensor buttons or sample vials on a lab bench, with the stop screw trimming the extend stroke per test and the male rod thread taking a custom probe.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-50B the Right Cylinder?
At 56.5 N push at 0.5 MPa this 12 mm bore suits light clamping and small part ejection. If your load needs more, step up to the 16 mm bore (100.5 N push at 0.5 MPa); for very light pick-and-place the same bore family starts here, so there is no smaller ACEJ option. The male rod thread (B code) mounts tooling directly; FA flange or LB foot brackets bolt to the ISO 21287 face. Note the stop screw only shortens the extend stroke and is not a mid-stroke lock: on air loss the piston still drifts. If you need position sensing, order the -S variant with the optional magnet for CMSE / DMSE switches - 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 ACEJ12X50-50B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. It is double acting with a 12 mm bore, 50 mm stroke and a 50 mm adjustment window (usable extend range 0-50 mm) set by an external stop screw. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um, port M5x0.8, rod 6 mm with male thread (PT body ports).
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits where a full-length cylinder will not. Fixed TPU bumpers at both ends absorb end-of-stroke impact. Mounting is via FA flange, LB foot or FTC brackets plus I/Y rod knuckles on the standard ISO 21287 face. For position feedback, order the -S code: that adds the optional magnet so CMSE / DMSE switches can be mounted. This model (no S code) has no magnet, so no sensor can be fitted.
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