Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20 is a genuine double acting, double rod, 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, double rod, adjustable stroke
- Rod threadM3×0.5
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20
The ACEJ12X50-20 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures, small guards and slim gantries.
The hard-anodized aluminium body carries a 6 mm S45C hard-chrome rod with a female M3x0.5 thread, a fixed TPU bumper at each end absorbs end-of-stroke energy, and speeds run 30-500 mm/s at 0.15-1.0 MPa (22-145 psi). Note: this version has no magnet, so position sensing needs the optional -S code with CMSE / DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 50 mm |
| Acting type | Double acting, double rod, 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 42 N |
| 0.7 MPa | 59 N |
| Max (@1.0 MPa) | 9 kgf |
ACEJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
Model Code: Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 (double rod, 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 ACEJ12X50-20 Is Used
Micro press fixture
Light staking and marking on small electronics housings where 56.5 N at 0.5 MPa is enough and the 30-50 mm adjustable stroke lets one cylinder serve several part heights.
Small part ejection
Pushing coins, caps or terminals off a narrow conveyor lane; the compact body fits where a full-length profile cylinder would overhang the frame.
Test station actuator
Toggling a limit lever or sample holder in a bench-top tester, with the optional -S magnet enabling CMSE / DMSE switches for end-position confirmation.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-20 the Right Cylinder?
If 56.5 N is far more than needed, the 20 mm stroke of the ACEJ12X20-20 keeps the same force in a shorter body. The stop screw only shortens the extend stroke within the 20 mm window and is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. FA flange or LB foot mounts bolt to the ISO 21287 face; add the -S code if CMSE / DMSE switch sensing is planned.
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 ACEJ12X50-20 FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa push rises to 79.2 N and pull to 59.4 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The -20 code sets a 20 mm adjustment window: an external stop screw shortens the 50 mm extend stroke by up to 20 mm, so the working range is 30-50 mm. It shortens the stroke only and acts as an end stop, not a load-holding brake.
It is an ISO 21287 compact cylinder whose short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a hard-anodized aluminium body, 6 mm hard-chrome rod, fixed TPU bumpers at both ends and an M5x0.8 port. FA flange and LB foot mounts fit the standard face. Sensing is not included: order the optional -S magnet version to run CMSE / DMSE switches; this model without -S has no magnet.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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