Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-50
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-50 is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 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 ACEJ125X225-50
The ACEJ125X225-50 is a double acting, adjustable-stroke compact cylinder built to ISO 21287. Its 125 mm bore delivers 6135.9 N push and 5890.5 N pull at 0.5 MPa, rising to 8590.3 N push at 0.7 MPa, with a theoretical maximum of 1251.4 kgf at 1.0 MPa. A stop screw trims the 225 mm extend stroke by up to 50 mm on site, giving a usable range of 175-225 mm without changing the cylinder.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so this heavy-force class fits presses, gantries and clamping fixtures where a full-length cylinder will not. Plan for roughly 3680 N (about 375 kg) of real work at 0.5 MPa, or halve the 625.9 kgf push equivalent for a 2:1 margin and lift about 313 kg vertically. The hard-anodized aluminium body carries an S45C hard-chrome rod, fixed TPU bumpers at both ends, and 1/4" ports; FA flange and LB foot mounts bolt straight to the ISO 21287 face.
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-50 Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-50 |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 225 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 ACEJ125X225-50
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 ACEJ125 Adjustable Compact Cylinder ACEJ125X225-50 Is Used
Heavy clamping on machining fixtures
The 6135.9 N push at 0.5 MPa clamps large castings or weldments on CNC fixtures, and the 50 mm window lets you trim the 225 mm stroke to match fixture height without shimming.
Press-fit and staking stations
With about 375 kg of usable working force at 0.5 MPa, this bore handles light press-fit, staking and marking jobs on assembly lines where a full-profile cylinder is too long.
Gantry lift-and-lower modules
Lifts about 313 kg vertically with a 2:1 margin, making it suitable for gantry pick-and-place of heavy pallets or battery packs in warehouse automation.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-50 the Right Cylinder?
At 125 mm bore this is the top of the ACEJ range: 6135.9 N push at 0.5 MPa versus 3927.0 N for the 100 mm bore, while the 80 mm bore gives 2513.3 N. Step down to 100 mm if your load sits below about 2350 N of working force. The -50 window shortens the extend stroke only; it is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. Order the -S code if you need the optional magnet for CMSE / DMSE switches - this model has no magnet fitted, so no sensor can be mounted as supplied.
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 ACEJ125X225-50 FAQ
Push is 6135.9 N and pull is 5890.5 N at 0.5 MPa; at 0.7 MPa push rises to 8590.3 N and pull to 8246.7 N. Theoretical maximum is 1251.4 kgf at 1.0 MPa. The ordered stroke is 225 mm with a 50 mm adjustment window, so the extend stroke can be trimmed to 175-225 mm via the external stop screw. Operating pressure is 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, air filtered to 40 um. Port is 1/4" PT and the rod end is female M16x2.0.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it suits tight gantries and guards. A fixed TPU bumper at each end absorbs end-of-stroke energy. FA flange and LB foot mounts bolt to the standard ISO 21287 face. Sensing requires the optional -S magnet ordered with the cylinder; this model has no magnet, so CMSE / DMSE switches cannot be fitted unless you specify -S.
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