Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 75mm 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
- Stroke75 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 ACEJ20X75-50
The ACEJ20X75-50 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 75 mm stroke by up to 50 mm on site, giving a usable range of 25-75 mm without changing the cylinder. At 0.5 MPa the 20 mm bore delivers 157.1 N push and 117.8 N pull, rising to 219.9 N push at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. Air supply is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and a fixed TPU bumper sits at both ends.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body will not fit. As a rule of thumb, plan on roughly 94 N (about 0.6 of the push force) of real work at 0.5 MPa, which corresponds to lifting about 9 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries an S45C hard-chrome rod, and this version has a female M6x1.0 rod thread with a 1/8-class M5x0.8 port.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 75 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 ACEJ20X75-50
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -50 | 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 ACEJ20X75-50 Is Used
Reject chute gating on packaging lines
The 25-75 mm adjustable window lets a line engineer dial the gate opening to match carton sizes without swapping cylinders, with 157.1 N push at 0.5 MPa enough for lightweight diverters.
Small-part ejection from plastic injection molds
A 20 mm bore with 219.9 N push at 0.7 MPa nudges finished clips or bushings off the mold face, and the short body fits the narrow space between tie bars.
Bench-top press fitting of dowel pins
About 94 N of usable work at 0.5 MPa presses dowels into aluminum housings on assembly benches, with the 50 mm trim window matching different pin depths.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50 the Right Cylinder?
Size the load against the numbers: 157.1 N push at 0.5 MPa suits light clamping and small part transfer; if your load needs more, step up to the 25 mm bore (245.4 N push at 0.5 MPa), and if it needs less, the 16 mm bore (100.5 N push) keeps the envelope smaller. The 75 mm stroke is within the 100 mm maximum standard stroke for this bore, so it is a standard build. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock: on air loss the piston still drifts, so add a separate holding valve if the load must stay put. Mounting is via the ISO 21287 face with FA flange or LB foot options plus I/Y rod knuckles, and if you later need position sensing, order the -S variant with the optional magnet for CMSE / DMSE switches - this model has no magnet fitted.
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 ACEJ20X75-50 FAQ
Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push is 219.9 N and pull 164.9 N; theoretical maximum is 32 kgf at 1.0 MPa. It is double acting with an adjustable extend stroke: the -50 stop screw trims the 75 mm stroke by up to 50 mm, so the working range is 25-75 mm. 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, female M6x1.0 rod thread, and a fixed TPU bumper at both ends.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits shallow fixtures and guarded spaces. Sensing is not fitted on this model: the magnet is the optional -S code, so to run CMSE or DMSE switches you would order ACEJ20X75-50S instead. Mounting brackets (FA flange, LB foot, FTC) and I/Y rod knuckles bolt to the standard ISO 21287 face.
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