Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40B 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 ACEJ12X50-40B
The ACEJ12X50-40B is a double acting ISO 21287 compact cylinder with a 12 mm bore and a 50 mm stroke that an external stop screw trims on site. The -40 code gives a 40 mm adjustment window, so the extend stroke can be set anywhere from 10 to 50 mm without changing the cylinder. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa push rises to 79.2 N, with a theoretical maximum of 11.5 kgf at 1.0 MPa.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures, small guarding and bench-top tooling. In practice, plan on roughly 34 N (about 0.6 of the push figure) for real work at 0.5 MPa, which corresponds to lifting about 2 kg vertically with a 2:1 margin. The B code supplies a male M3x0.5 rod thread, and the fixed TPU bumpers at both ends absorb end-of-stroke shock. Note that no magnet is fitted on this version; the optional -S code is required before CMSE or DMSE switches can be used.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40B |
|---|---|
| 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 ACEJ12X50-40B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -40 | 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 ACEJ12X50-40B Is Used
Micro assembly press
The 34 N practical push class at 0.5 MPa is enough to seat small connectors, pins and springs in electronics or watch-grade subassemblies, with the 10-50 mm stroke range matched per fixture.
Small-part diverting on conveyors
Mounted on an LB foot bracket beside a miniature conveyor, the trimmed extend stroke kicks chips, caps or sorted components off the belt without overshooting the lane.
Lab and test fixture actuation
The compact body fits inside bench-top test rigs and inspection jigs where a full-length ISO 15552 profile cylinder cannot, and the male M3x0.5 rod thread suits small tooling adapters.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40B the Right Cylinder?
At 56.5 N push and 42.4 N pull at 0.5 MPa, this 12 mm bore suits light clamping, sorting 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 lighter duty, the same body family starts at bore 12, so this is the entry size. The stop screw is a mechanical end stop only - on air loss the piston can still drift, so do not rely on it to hold a load mid-stroke. Mount with FA flange or LB foot brackets on the ISO 21287 face, and if position sensing is needed, order the -S variant to enable the optional magnet for CMSE / DMSE switches.
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 ACEJ12X50-40B FAQ
Bore 12 mm, stroke 50 mm with a 40 mm adjustment window (usable extend stroke 10-50 mm). Push is 56.5 N and pull 42.4 N at 0.5 MPa; at 0.7 MPa push reaches 79.2 N and pull 59.4 N; theoretical maximum force is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, air filtered to 40 um, temperature -20 to +70 C. Port is M5x0.8 and the rod thread is male M3x0.5 (B code).
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with fixed TPU bumpers at both ends to absorb end-of-stroke impact. FA flange, LB foot and FTC brackets plus I and Y rod knuckles bolt to the standard face. This version has no magnet fitted; order the -S code to enable the optional magnet so CMSE or DMSE reed or solid-state switches can be mounted on the body slots.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X50-40B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.