Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40B
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40B is a genuine double acting, double rod, adjustable stroke ISO 21287 compact air cylinder with a Ø12mm bore and 45mm 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
- Stroke45 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 ACEJ12X45-40B
This double acting AirTAC ACEJ12X45-40B is an ISO 21287 compact cylinder with a 12 mm bore and a 45 mm stroke that an external stop screw can trim anywhere in a 40 mm window, giving a usable extend range of 5-45 mm. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those figures rise to 79.2 N and 59.4 N, with a theoretical ceiling of 11.5 kgf at 1.0 MPa. The hard-anodized aluminium body is about 50% shorter in mounting length than an ISO 15552 profile cylinder, so it slots into tight fixtures a full-length body cannot reach.
The rod is 6 mm with a MALE thread (the B code), and the port is M5x0.8. A fixed TPU bumper at each end absorbs end-of-stroke impact, and the stop screw is a mechanical end stop only: on air loss the piston still drifts, so it never holds a load. Note there is no magnet fitted - order the -S variant if you need CMSE / DMSE switch sensing.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø12 mm |
| Stroke | 45 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 ACEJ12X45-40B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 (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 ACEJ12X45-40B Is Used
Vial and ampoule rejection pusher
On pharma packaging lines, the 45 mm stroke with a 40 mm trim window ejects off-spec vials from a conveyor lane, and the compact body fits inside tight guard panels.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ12X45-40B the Right Cylinder?
Check that your duty is extend-side trimming only - the -40 window shortens the 45 mm stroke down to 5 mm but never extends past it, and it is not a mid-stroke lock. Mount with FA flange or LB foot on the ISO 21287 face, choose female or male (B) rod thread to suit your tooling, and add the -S magnet code only if CMSE / DMSE position switches are actually needed.
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 ACEJ12X45-40B FAQ
Bore 12 mm, stroke 45 mm, adjustable extend stroke in a 40 mm window (usable 5-45 mm). Operating pressure 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um. Port is M5x0.8, rod is 6 mm with male thread (B code), and the body is hard-anodized aluminium with an S45C hard-chrome rod.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it fits crowded jigs and gantries. A fixed TPU bumper at each end absorbs end-of-stroke impact. Mounting options include FA flange and LB foot plus I/Y rod knuckles on the standard ISO 21287 face. Position sensing requires the optional -S magnet code - this model (no S) has no magnet, so CMSE / DMSE switches cannot be mounted unless you order the -S version.
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1-Year Warranty
Covers non-human-caused product damage.
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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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