Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-75S
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-75S 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 ACEJ125X225-75S
The ACEJ125X225-75S 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 at 0.7 MPa - enough for heavy clamping, pressing and lifting duties. The -75 code gives a 75 mm adjustment window: an external stop screw trims the extend stroke anywhere between 150 and 225 mm on site, so one cylinder serves several die or fixture positions.
The hard-anodized aluminium body with an S45C hard-chrome-plated 25 mm rod keeps the envelope short - the body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which matters in guarded presses and gantry frames. Fixed TPU bumpers at both ends absorb end-of-stroke shock, and the fitted -S magnet accepts CMSE / DMSE switches for end-position sensing. At 0.5 MPa the push force equates to roughly 625 kgf, so plan on lifting about 313 kg vertically with a 2:1 margin.
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-75S Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-75S |
|---|---|
| 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 ACEJ125X225-75S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | Bore size in mm. |
| ×225 | Stroke length in mm. |
| -75 | 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 ACEJ125X225-75S Is Used
Heavy press and forming fixtures
With 8590.3 N at 0.7 MPa and a 150-225 mm trimmed extend stroke, the cylinder suits stamping and forming fixtures where die height changes between runs and the stop screw is reset without swapping cylinders.
Pallet and die cart actuation
The 6135.9 N push force at 0.5 MPa moves loaded die carts and pallet stops in machine shops, while the short ISO 21287 body fits under low guard rails where a full-length profile cylinder cannot.
Vertical lift stations on assembly lines
Lifting about 313 kg vertically with a 2:1 margin at 0.5 MPa, the 25 mm hard-chrome rod handles automotive subassembly lift-and-lower stations, with CMSE / DMSE switches confirming up and down positions.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X225-75S the Right Cylinder?
At this bore size there is no larger standard ACEJ, so size down if the load allows: a 100 mm bore gives 3927.0 N push at 0.5 MPa and an 80 mm bore gives 2513.3 N. Choose the 125 mm when you need the full 6135.9 N or the 1251.4 kgf theoretical ceiling at 1.0 MPa. Remember the stop screw sets the extend position mechanically - it is not a mid-stroke lock, so the rod can drift if air is lost. FA flange, LB foot and FTC brackets plus I and Y rod knuckles bolt to the ISO 21287 face, and the M16x2.0 female rod thread suits standard rod accessories.
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 ACEJ125X225-75S FAQ
At 0.5 MPa it pushes 6135.9 N and pulls 5890.5 N; at 0.7 MPa push rises to 8590.3 N (pull 8246.7 N), with a theoretical maximum of 1251.4 kgf at 1.0 MPa. The -75 code means an external stop screw shortens the 225 mm extend stroke by up to 75 mm, giving a usable range of 150-225 mm. The screw is a mechanical end stop only - it does not hold a load if air pressure is lost.
The ISO 21287 compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it fits tight guards and gantries. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clamped anywhere along the body slots. FA flange, LB foot and FTC brackets plus I and Y rod knuckles mount on the standard face, the M16x2.0 female rod thread takes standard accessories, and fixed TPU bumpers absorb end-of-stroke shock. Operating range is 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, -20 to +70 C.
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