Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30 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 ACEJ20X75-30
The ACEJ20X75-30 is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. A 20 mm bore delivers 157.1 N push and 117.8 N pull at 0.5 MPa, rising to 219.9 N at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. An external stop screw trims the 75 mm extend stroke anywhere within the ordered 30 mm window, giving a usable range of 45-75 mm without changing the cylinder.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into shallow jigs, guards and gantries. Plan on roughly 94 N (about 9.5 kgf) of real working force at 0.5 MPa, which lifts about 8 kg vertically with a 2:1 margin. A fixed TPU bumper at each end absorbs end-of-stroke energy, and the hard-anodized aluminium body with an S45C hard-chrome rod runs at 30-500 mm/s on air filtered to 40 um.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30 Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30 |
|---|---|
| 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 ACEJ20X75-30
| 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 ACEJ20X75-30 Is Used
Fixture clamping on CNC jigs
The 45-75 mm adjustable extend range lets a machinist dial the clamp arm travel to the fixture, with 157.1 N push at 0.5 MPa holding light aluminum parts.
Small-parts ejection from press dies
At 30-500 mm/s the rod kicks finished bushings or terminals off a die face, and the 30 mm window absorbs die-height variation across changeovers.
Carton push-off on packing benches
About 9.5 kgf of usable force at 0.5 MPa slides folded cartons off a conveyor lane, and the short body fits under low bench frames.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30 the Right Cylinder?
Size up if you need more force: a 25 mm bore pushes 245.4 N at 0.5 MPa, while stepping down to a 16 mm bore gives 100.5 N. This 20 mm model suits clamping and positioning loads in the 90-95 N working range. Note that the stop screw is a mechanical end stop only - on air loss the piston drifts, so it is not a mid-stroke lock. FA flange or LB foot mounts bolt to the standard ISO 21287 face, and if you later need position sensing, order the -S variant so CMSE / DMSE switches can be fitted; this unit has no magnet.
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 ACEJ20X75-30 FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa it pushes 219.9 N and pulls 164.9 N. The theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, and speed spans 30-500 mm/s.
An external stop screw shortens the 75 mm extend stroke by up to 30 mm on site, so the effective extend range is 45-75 mm; it cannot lengthen the stroke past 75 mm. The body is a compact ISO 21287 build about 50% shorter in mounting length than an ISO 15552 profile cylinder, with a fixed TPU bumper at both ends and FA/LB mounting options. This unit has no magnet, so no CMSE or DMSE switch can be mounted - order the -S code for the optional magnet if sensing is needed.
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