Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 30mm 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
- Stroke30 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 ACEJ12X30-20B
The ACEJ12X30-20B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. A 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 -20 code gives a 20 mm adjustment window, so the external stop screw trims the 30 mm extend stroke anywhere down to 10 mm on site. The B code specifies a male rod thread on the 6 mm rod, and the port is M5x0.8.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into slim fixtures and guarded cells. Plan on roughly 34 N of real work at 0.5 MPa (about 60% of the rating), which is a vertical lift of around 2 kg with a 2:1 margin. The hard-anodized aluminium body carries a hard-chrome plated S45C rod, fixed TPU bumpers sit at both ends, and speed runs 30-500 mm/s at 0.15-1.0 MPa (22-145 psi). Note this unit has no magnet fitted; order the -S version if you need CMSE or DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 30 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 ACEJ12X30-20B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×30 | 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 ACEJ12X30-20B Is Used
Micro part ejection
Ejecting small machined bushings or stamped terminals off a nest, where the 10-30 mm trimmed stroke and 56.5 N push clear parts without disturbing the fixture.
Compact test stations
Light go/no-go press checks on PCB connectors or relay contacts inside tight guarding, using the short body and a DMSE switch on a -S ordered unit to confirm rod position.
Small carton kickers
Deflecting blister packs or sachets on a conveyor lane change, where the 42.4 N pull at 0.5 MPa retracts the kicker clear of passing product.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X30-20B the Right Cylinder?
At this bore size the 56.5 N push at 0.5 MPa suits light clamping, ejecting and sorting of small parts. If your load needs more, step up to bore 16 for 100.5 N or bore 20 for 157.1 N at 0.5 MPa; if less, there is no smaller ACEJ bore, so reduce pressure instead. The stop screw only shortens the extend stroke and acts as an end stop, not a mid-stroke lock, so the rod will still drift if air is lost. Mounting: FA flange or LB foot brackets bolt to the ISO 21287 face, and I or Y rod knuckles suit the male threaded rod. Max standard stroke for bore 12 is 50 mm, so 30 mm is a standard build.
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 ACEJ12X30-20B FAQ
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, with a theoretical maximum of 11.5 kgf at 1.0 MPa. It is double acting with a 12 mm bore, 30 mm stroke adjustable down to 10 mm via the 20 mm window, M5x08 ports written as M5x0.8, a male threaded 6 mm rod, speed 30-500 mm/s, and operating pressure 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits slim slides and guarded assemblies. Fixed TPU bumpers absorb end-of-stroke impact at both ends, and FA flange or LB foot brackets bolt straight on. Position sensing needs the optional -S magnet code; this model has no magnet fitted, so no CMSE or DMSE switch will read on it as ordered.
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