Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50S 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 ACEJ20X75-50S
Double acting and stroke-adjustable, the ACEJ20X75-50S is a genuine AirTAC ISO 21287 compact cylinder with a 20 mm bore and 75 mm stroke. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa. Its short 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.
The -50 code adds a 50 mm adjustment window: an external stop screw trims the extend stroke anywhere between 25 and 75 mm on site, no disassembly needed. With the -S magnet fitted, CMSE or DMSE reed and solid-state switches can be clamped into the body slots for end-of-travel signals. Plan on roughly 94 N (about 9.6 kgf) of usable work at 0.5 MPa, which lifts around 4.8 kg vertically with a 2:1 margin. A fixed TPU bumper at each end absorbs end-of-stroke shock, and FA flange or LB foot mounts plus I/Y rod knuckles bolt straight to the ISO 21287 face.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50S |
|---|---|
| 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 ACEJ20X75-50S
| 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 ACEJ20X75-50S Is Used
PCB test fixture clamping
The 25-75 mm trim range lets one cylinder serve several fixture heights on a test bench, with 157.1 N of push holding boards against a nest at 0.5 MPa.
Pick-and-place end detection
With the -S magnet fitted, CMSE or DMSE switches confirm extend and retract on a small gantry axis running at 30-500 mm/s.
Bottle-capper eject stroke
Set the stop screw to eject filled vials with about 9.6 kgf of usable force, trimming the stroke down to 25 mm to match a shallow conveyor lane.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50S the Right Cylinder?
At 157.1 N push at 0.5 MPa this 20 mm bore suits light clamping and positioning. Step down to the 16 mm bore (100.5 N push) for smaller loads, or up to the 25 mm bore (245.4 N push) if your fixture grows. 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 valve or lock for load holding. Choose the female M6x1.0 rod thread as coded, or the B variant for male thread, and add FA/LB mounting to match your fixture.
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 ACEJ20X75-50S FAQ
This 20 mm bore model pushes 157.1 N and pulls 117.8 N at 0.5 MPa, and pushes 219.9 N at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting, runs on air filtered to 40 um at 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, with a fixed TPU bumper at both ends and an M5x0.8 port.
The -50 code gives a 50 mm window: an external stop screw shortens the 75 mm extend stroke to any length from 25 to 75 mm, set on site with a wrench. The body carries the optional -S magnet, which this model includes, so CMSE or DMSE reed or solid-state switches mount directly in the body slots. The hard-anodized aluminium compact body takes FA flange, LB foot and FTC brackets plus I/Y rod knuckles on the ISO 21287 face.
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