Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30S
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30S 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 ACEJ20X75-30S
A double acting compact cylinder built to ISO 21287, the ACEJ20X75-30S pairs a 20 mm bore with a 75 mm stroke and a 30 mm adjustment window: an external stop screw trims the extend stroke anywhere in the 45-75 mm range without touching the machine. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N, rising to 219.9 N at 0.7 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures and guarded cells.
The hard-anodized aluminium body carries a hard-chrome plated S45C rod, and a fixed TPU bumper at each end absorbs end-of-stroke impact. 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-travel sensing. Plan on roughly 94 N (about 9.6 kg of force) of real work at 0.5 MPa rather than the full rating, and expect it to lift about 8 kg vertically with a 2:1 margin.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30S Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30S |
|---|---|
| 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 ACEJ20X75-30S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -30 | 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 ACEJ20X75-30S Is Used
Fixture clamp with trimmed stroke
Clamps thin aluminium brackets on a CNC jig where the 45-75 mm adjustable range lets one cylinder serve several part heights, delivering about 94 N of usable clamp force at 0.5 MPa.
Position-verified ejector
Ejects small housings from an assembly nest with CMSE switch feedback at both ends, the fitted -S magnet confirming the rod has retracted before the next cycle starts.
Compact press assist
Adds 157.1 N of push at 0.5 MPa to a manual press station for snapping connectors into PCBs, its short body fitting under a low guard where a full-length profile cylinder will not.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30S the Right Cylinder?
At 157.1 N push at 0.5 MPa this 20 mm bore sits between the 16 mm bore (100.5 N) and the 25 mm bore (245.4 N); step down for light clamping, up if your load approaches 9-10 kg of working force. The adjuster is a mechanical end stop for the extend stroke, not a mid-stroke lock, so the rod can drift if air is lost and an external brake is needed for load holding. FA flange or LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet lets you add CMSE / DMSE switches at commissioning.
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 ACEJ20X75-30S FAQ
This 20 mm bore model pushes 157.1 N and pulls 117.8 N at 0.5 MPa, and 219.9 N / 164.9 N at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. It runs double acting 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. The extend stroke is trimmed by an external stop screw within the ordered 30 mm window (usable 45-75 mm), the port is M5x0.8, the rod thread is female M6x1.0, and the -S magnet for CMSE / DMSE switches is fitted.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which is why it suits tight jigs and guarded machines. A fixed TPU bumper at each end absorbs end-of-stroke energy; it only decelerates the piston at the ends and never locks or holds a load. Mounting options include FA flange and LB foot, and the fitted -S magnet accepts CMSE / DMSE reed or solid-state switches.
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