Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20S 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 ACEJ20X75-20S
A double acting ISO 21287 compact cylinder, the ACEJ20X75-20S pairs a 20 mm bore with a 75 mm stroke that an external stop screw can trim on site by up to 20 mm, giving a usable extend range of 55-75 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N and 164.9 N, with a theoretical 32 kgf at 1.0 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarding where a full-length body will not fit.
Because the -S magnet is fitted on this model, CMSE or DMSE reed and solid-state switches mount directly in the body slots for end-of-stroke sensing. The hard-anodized aluminium body carries a hard-chrome plated S45C rod with a female M6x1.0 thread, and fixed TPU bumpers at both ends absorb end-of-stroke shock. For vertical work, halving the 157.1 N push leaves roughly 8 kg of lift capacity with margin, enough for small chutes, gates and pick-and-place parts.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20S |
|---|---|
| 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 ACEJ20X75-20S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 (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 ACEJ20X75-20S Is Used
Small jig clamping
The 157.1 N push at 0.5 MPa clamps light aluminium or plastic workpieces in drilling and assembly jigs, while the 55-75 mm adjustable range lets one cylinder serve several fixture depths.
Pick-and-place lift
With about 8 kg of vertical lift capacity at a 2:1 margin, the 20 mm bore raises small machined parts between stations, and the fitted -S magnet feeds CMSE switch signals to the PLC.
Gate and chute diverting
On packaging lines, the 75 mm stroke (trimmable to 55 mm) deflects product flow at conveyor gates, with the M5x0.8 ports keeping plumbing compact inside tight machine frames.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-20S the Right Cylinder?
Check the load first: 157.1 N push at 0.5 MPa means plan for around 94 N of real work, and about 8 kg of vertical lift with a 2:1 margin. If your load exceeds that, step up to the 25 mm bore (245.4 N push at 0.5 MPa); if it is lighter, the 16 mm bore at 100.5 N may save space. The 75 mm stroke sits inside the 100 mm maximum standard stroke for this bore, so no made-to-order build is needed. FA flange or LB foot mounts plus I and Y rod knuckles bolt to the ISO 21287 face, and the female M6x1.0 rod thread suits standard tooling plates. Note the stop screw sets the extend end position only; it is not a mid-stroke lock, so the rod can drift if air is lost.
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 ACEJ20X75-20S FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa, 219.9 N push and 164.9 N pull; theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, air filtered to 40 um, and a temperature range of -20 to +70 C. The extend stroke is adjustable from 55 to 75 mm via the external stop screw.
The -20 code sets a 20 mm adjustment window: turn the external stop screw to shorten the 75 mm extend stroke anywhere within it, so the usable range is 55-75 mm. The stop is a mechanical end stop, not a mid-stroke lock, so the rod still drifts on air loss. This model carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches mount in the body slots. Fixed TPU bumpers at both ends absorb end-of-stroke energy, and the short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder.
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