Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X40-20B
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ16X40-20B is a genuine double acting, double rod, adjustable stroke ISO 21287 compact air cylinder with a Ø16mm 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.
- BoreØ16 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM4×0.7
- 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 ACEJ16X40-20B
This double acting AirTAC ACEJ16X40-20B is an ISO 21287 compact cylinder with a 16 mm bore and a 40 mm stroke that an external stop screw trims on site by up to 20 mm, giving a usable extend range of 20-40 mm. At 0.5 MPa it pushes 100.5 N and pulls 75.4 N, rising to 140.7 N at 0.7 MPa. The hard-anodized aluminium body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarding where a full-length body cannot.
The 8 mm S45C hard-chrome rod ends in a male thread (the B code), a fixed TPU bumper absorbs end-of-stroke shock at both ends, and speed runs 30-500 mm/s. Note that this model has no magnet fitted, so position sensing needs the optional -S version with CMSE / DMSE switches.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X40-20B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X40-20B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø16 mm |
| Stroke | 40 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 75 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 (Ø16mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 75 N |
| 0.7 MPa | 106 N |
| Max (@1.0 MPa) | 15 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 ACEJ16X40-20B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×40 | 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 ACEJ16X40-20B Is Used
Low-force clamping of electronics housings
With roughly 5 kg of vertical-lift equivalent, the 16 mm bore clamps plastic enclosures or PCB fixtures gently, while the compact body fits inside tight jig plates.
Indexing slide in a compact test rig
The 20-40 mm adjustable extend range positions sensor probes or marking heads in bench-top rigs; add the -S magnet code when CMSE / DMSE end-position feedback is needed.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X40-20B the Right Cylinder?
The stop screw is a mechanical end stop only, so never rely on it to hold a load if air is lost. FA flange or LB foot mounts bolt to the ISO 21287 face, and the male rod thread suits clevis-style linkages; order the -S code if CMSE / DMSE switch feedback is required.
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 ACEJ16X40-20B FAQ
Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um, port M5x0.8, rod 8 mm with male thread, and the extend stroke is adjustable from 20-40 mm via the stop screw.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits slim jigs and guarded areas. A stop screw on the head shortens the 40 mm extend stroke by up to 20 mm on site. A fixed TPU bumper at each end absorbs end-of-stroke impact, FA/LB mounting bolts to the standard face, and the optional -S magnet enables CMSE / DMSE switches on this model.
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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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