Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30S
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30S is a genuine double acting, double rod, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 40mm 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
- Stroke40 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 ACEJ12X40-30S
A double acting ISO 21287 compact cylinder with an adjustable extend stroke, the ACEJ12X40-30S pairs a 12 mm bore and 40 mm stroke with a 30 mm adjustment window. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N, rising to 79.2 N at 0.7 MPa, with a theoretical maximum of 11.5 kgf at 1.0 MPa. The stop screw on the end cover trims the extend stroke anywhere between 10 and 40 mm on site, so one cylinder serves several jig positions.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight pick-and-place heads and small guarding panels. Because the -S magnet is fitted, CMSE or DMSE reed and solid-state switches can be clamped straight onto the body for end-of-stroke signals.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 40 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 ACEJ12X40-30S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×40 | 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 (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 ACEJ12X40-30S Is Used
Micro jig clamping
The 34 N usable push at 0.5 MPa is enough to hold small machined or 3D-printed parts in drilling and marking fixtures, with the stroke trimmed to the exact clamp height.
Switched pick-and-place
With the -S magnet fitted, CMSE / DMSE switches confirm extend and retract on a 10-40 mm stroke, ideal for feeding tiny components into a test nest.
Lab slide actuation
A 12 mm bore sliding a cover or sample tray on a compact benchtop device, where the short ISO 21287 body fits inside a housing an ISO 15552 profile cylinder cannot.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X40-30S the Right Cylinder?
The 30 mm window means the 40 mm stroke can be shortened to as little as 10 mm without changing hardware. The adjuster is a mechanical end stop only, so on air loss the piston can drift and it never holds a load mid-stroke. FA flange or LB foot mounts bolt to the ISO 21287 face, and the fitted -S magnet accepts 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 ACEJ12X40-30S FAQ
The ordered stroke is 40 mm with a 30 mm adjustment window, so the extend stroke can be set anywhere from 10 to 40 mm via the external stop screw. Speed range is 30-500 mm/s and operating pressure is 0.15-1.0 MPa (22-145 psi).
The hard-anodized aluminium body is an ISO 21287 compact design, roughly 50% shorter in mounting length than an ISO 15552 profile cylinder, with an S45C hard-chrome rod, M5x0.8 ports and fixed TPU bumpers at both ends. The -S magnet this model carries lets CMSE / DMSE switches sense rod position, and FA flange or LB foot mounting bolts to the standard ISO 21287 face.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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