Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø125mm bore and 75mm stroke, 1/4" 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.
- BoreØ125 mm
- Stroke75 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke
- Rod threadM16×2.0
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30
This is the largest bore in the ACEJ range: a double acting ISO 21287 compact cylinder with a 125 mm bore, 75 mm stroke and a 30 mm adjustable window. An external stop screw trims the extend stroke anywhere between 45 and 75 mm on site, so one cylinder serves several die or fixture positions without changing hardware. At 0.5 MPa it delivers 6135.9 N on the extend stroke and 5890.5 N on retract, rising to 8590.3 N at 0.7 MPa.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which matters when a 125 mm bore has to fit inside a press frame or heavy gantry. A practical sizing rule: keep real work to roughly 3682 N (about 375 kg equivalent) at 0.5 MPa, and expect around 313 kg of vertical lift with a 2:1 margin. The hard-anodized aluminium body carries a 25 mm hard-chrome-plated S45C rod with a female M16x2.0 thread, fixed TPU bumpers absorb end-of-stroke shock at both ends, and the optional -S magnet enables CMSE / DMSE switches when ordered.
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30 Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 75 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/4" |
| Rod thread | M16×2.0 |
| 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 300 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5890 N |
| 0.7 MPa | 8590 N | 8247 N |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | 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 ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30 Is Used
Press-frame clamping
The 6135.9 N extend force at 0.5 MPa clamps heavy weld fixtures or die shoes, while the 30 mm window lets a technician set the exact clamp height after tooling changes.
Heavy pallet lift-assist
With about 313 kg of vertical lift at a 2:1 margin, the 125 mm bore raises loaded pallets or castings in a warehouse elevator head; the short body fits where a full-length profile cylinder cannot.
Baling and compaction
A recycling baler uses the 45-75 mm adjustable stroke to compact scrap into a fixed chamber, with the fixed TPU bumper absorbing the impact at each end of travel.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30 the Right Cylinder?
At this force class, step down to a 100 mm bore (3927.0 N push at 0.5 MPa) if the load is under about 400 kg equivalent, or stay at 125 mm for presses, clamping rails and heavy lifters needing over 6000 N. The 30 mm window suits jobs where the final position is tuned after installation; remember the stop screw only shortens the extend stroke and does not hold a load if air is lost. FA flange or LB foot mounting bolts to the ISO 21287 face, and the 1/4" port keeps air supply adequate at 30-500 mm/s. If position feedback is needed, order the -S code so CMSE / DMSE switches can be 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 ACEJ125 Adjustable Compact Cylinder ACEJ125X75-30 FAQ
At 0.5 MPa it pushes with 6135.9 N and pulls with 5890.5 N. At 0.7 MPa those rise to 8590.3 N push and 8246.7 N pull. The theoretical maximum at 1.0 MPa is 1251.4 kgf. Operating pressure is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, speed 30-500 mm/s, and the extend stroke is adjustable from 45 to 75 mm via the external stop screw.
The -30 code sets a 30 mm adjustment window: an external stop screw shortens the 75 mm extend stroke to any length down to 45 mm, and the fixed TPU bumpers at both ends absorb the remaining end-of-stroke energy. The stop is a mechanical end stop, not a mid-stroke lock, so the rod still drifts on air loss. Position sensing requires the optional -S magnet, which allows CMSE / DMSE switches on the body slots; without -S no magnet is fitted.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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