Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40 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 ACEJ20X90-40
Double acting and built to the ISO 21287 compact format, the ACEJ20X90-40 pairs a 20 mm bore with a 90 mm stroke that an external stop screw can trim on site by up to 40 mm, giving a usable extend range of 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. The hard-anodized aluminium body keeps the mounting length roughly 50% shorter than an ISO 15552 profile cylinder, so it slots into tight fixtures where a full-length body will not fit.
For sizing the load, treat about 94 N (roughly 60% of the 157.1 N push) as the practical working force at 0.5 MPa, which corresponds to lifting about 4 kg vertically with a 2:1 margin. The S45C hard-chrome rod runs in a roller-burnished bore with a grease-retaining two-way seal, fixed TPU bumpers absorb end-of-stroke shock at both ends, and speed spans 30-500 mm/s. Note that the stop screw is a mechanical end stop only - on air loss the piston drifts, so it is not a load-holding lock.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40 |
|---|---|
| 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 ACEJ20X90-40
| 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 ACEJ20X90-40 Is Used
Fixture clamp with tunable stroke
On a CNC jig for aluminium brackets, the 40 mm window lets a technician dial the extend stroke between 50 and 90 mm to clamp different bracket heights without swapping the cylinder, using about 94 N of practical working force at 0.5 MPa.
Sample pusher in lab automation
A compact sample-transfer slide in a diagnostic analyzer uses the short ISO 21287 body to fit under a guard, advancing trays at 30-500 mm/s with 157.1 N push available at 0.5 MPa.
Carton kick-off on a packing line
Kicking small cartons off a conveyor lane, the 90 mm stroke with the -40 trim covers varied lane widths, and the fixed TPU bumpers quiet the end positions at up to 500 mm/s.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X90-40 the Right Cylinder?
At 157.1 N push (0.5 MPa) this 20 mm bore suits light clamping and positioning; if your load needs more, the 25 mm bore delivers 245.4 N in the same compact body, while the 16 mm bore (100.5 N) covers lighter duties. The 90 mm stroke sits within the 100 mm maximum standard stroke for this bore, so no made-to-order build is required. Choose the female M6x1.0 rod thread as coded here, or add B for male thread. FA flange and LB foot mountings bolt to the ISO 21287 face, and if you need position feedback order the -S variant so CMSE / DMSE switches can sense the piston - without -S there is no magnet in the piston.
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 ACEJ20X90-40 FAQ
This 20 mm bore, 90 mm stroke compact cylinder pushes 157.1 N and pulls 117.8 N at 0.5 MPa; at 0.7 MPa those rise to 219.9 N push and 164.9 N pull, with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the stop screw trims up to 40 mm, so the usable range is 50-90 mm. Operating pressure is 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 M5x0.8, female M6x1.0 rod thread, fixed TPU bumpers both ends.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it fits shallow guards and tight jigs. Sensing is not included as standard: the piston magnet is the optional -S ordering code, and only with -S can CMSE or DMSE switches be mounted on the body's magnet slots. FA flange and LB foot mountings attach directly to the standard ISO 21287 face, and the stop screw is a mechanical end stop for the extend stroke - it does not hold a load if air is lost.
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