Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X90-30SB
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X90-30SB is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 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 ACEJ125X90-30SB
This is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 90 mm stroke by up to 30 mm on site, giving a usable range of 60-90 mm without changing the cylinder. At 0.5 MPa the 125 mm bore delivers 6135.9 N push and 5890.5 N pull, rising to 8590.3 N at 0.7 MPa, so it carries the heaviest loads in the ACEJ range. A male rod thread (B code) and PT ports suit direct tooling attachment.
The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which matters when a 125 mm bore must fit inside a press frame or guard. As a rule of thumb, plan on roughly 3680 N (about 375 kgf) of real work at 0.5 MPa, enough to lift about 312 kg vertically with a 2:1 margin. The -S magnet is fitted, so CMSE / DMSE switches can be added for end-of-stroke signalling, and FA flange or LB foot mounts bolt straight to the ISO 21287 face.
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X90-30SB Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X90-30SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 90 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 ACEJ125X90-30SB
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 ACEJ125X90-30SB Is Used
Heavy press and forming fixtures
The 6135.9 N push at 0.5 MPa suits clinching, staking and light forming on aluminium brackets, with the 60-90 mm adjustable range tuned to each die set.
Vertical lift in machine frames
Lifts about 312 kg vertically with a 2:1 margin at 0.5 MPa, and the short ISO 21287 body fits where a full-length profile cylinder will not.
Gate and clamp actuation on heavy tooling
The male rod thread and 25 mm rod drive clamping links on machining-centre fixtures, with CMSE switches signalling the trimmed end position.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X90-30SB the Right Cylinder?
Size up or down by force: a 100 mm bore gives 3927.0 N push at 0.5 MPa, while this 125 mm bore more than doubles that to 6135.9 N. If your load needs under 2182.1 N, a 63 mm bore is the lighter choice. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock - on air loss the piston still drifts, so add a separate valve or clamp for load holding. The 30 mm window covers fixtures where the final stroke is tuned after installation, and the male rod thread takes I or Y knuckles directly.
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 ACEJ125X90-30SB FAQ
At 0.5 MPa it pushes with 6135.9 N and pulls with 5890.5 N; at 0.7 MPa push rises to 8590.3 N. The theoretical maximum at 1.0 MPa is 1251.4 kgf. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, and the extend stroke is trimmed by the stop screw anywhere in the 60-90 mm range. The port is 1/4" PT and the rod end is a male thread.
It is an ISO 21287 compact cylinder with a hard-anodized aluminium body, S45C hard-chrome plated rod and a fixed TPU bumper at each end, about 50% shorter in mounting length than an ISO 15552 profile cylinder. This model carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be clipped into the body slots to report the adjusted end position. FA flange and LB foot mounts bolt straight to the standard face.
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