Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 90mm 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.
- BoreØ20 mm
- Stroke90 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40S
A double acting ISO 21287 compact cylinder, the ACEJ20X90-40S pairs a 20 mm bore with a 90 mm stroke that an external stop screw trims on site: the -40 code gives a 40 mm window, so the usable extend range is 50-90 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa, with a theoretical peak of 32 kgf at 1.0 MPa. The hard-anodized aluminium body with an S45C hard-chrome rod runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarded stations. Because the S code is fitted, CMSE or DMSE reed and solid-state switches can be clamped straight onto the body for end-of-travel signals. Rule of thumb for sizing: keep real work near 94 N (about 60% of the push rating), which corresponds to lifting roughly 9 kg vertically - halve that to about 4-5 kg if you want a 2:1 margin on a vertical lift.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 90 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 100 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | 165 N |
| Max (@1.0 MPa) | 32 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 ACEJ20X90-40S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×90 | 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 ACEJ20X90-40S Is Used
Ejector on a small assembly press
The 50-90 mm adjustable extend range lets one cylinder serve several part heights on a bench-top press, with 157.1 N at 0.5 MPa enough to seat light inserts.
Position-signalled slide on a packaging machine
With the fitted magnet and CMSE / DMSE switches, the 90 mm stroke gives confirmed extend and retract signals for carton push-off stations running at 30-500 mm/s.
Clamping in a compact jig
The short body, about 50% shorter in mounting length than an ISO 15552 profile cylinder, fits inside jig walls where a full-length cylinder cannot, delivering 219.9 N push at 0.7 MPa.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40S the Right Cylinder?
At this force class, compare with the smaller ACEJ16 (100.5 N push at 0.5 MPa) if your load is light, or step up to the ACEJ25 (245.4 N push at 0.5 MPa) if 157.1 N leaves no headroom. Remember the stop screw only shortens the extend stroke and drifts on air loss - it is not a mid-stroke lock, so support the load externally where holding matters. FA flange or LB foot mountings 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 ACEJ20X90-40S FAQ
At 0.5 MPa: 157.1 N push and 117.8 N pull. At 0.7 MPa: 219.9 N push and 164.9 N pull. Theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with a 90 mm stroke adjustable down to 50 mm via the -40 stop screw, port M5x0.8, female M6x1.0 rod thread, 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, with a fixed TPU bumper at both ends.
It is an ISO 21287 compact cylinder whose mounting length is about 50% shorter than an ISO 15552 profile cylinder, so it suits tight gantries and guards. This model carries the optional -S magnet, so CMSE or DMSE reed or solid-state switches mount directly in the body slots. FA flange and LB foot mountings plus I and Y rod knuckles bolt to the standard ISO 21287 face.
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