Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X125-100S
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X125-100S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 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 ACEJ125X125-100S
The ACEJ125X125-100S is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. 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 peak of 1251.4 kgf at 1.0 MPa. The -100 code adds a 100 mm adjustment window, so an external stop screw trims the 125 mm extend stroke anywhere down to 25 mm on site. A fixed TPU bumper sits at both ends, and the optional -S magnet this model carries lets CMSE / DMSE switches report position.
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 press or clamp must fit inside a guarded frame. In practice, plan on roughly 3680 N of usable push at 0.5 MPa, which lifts about 375 kg vertically; halving the 625 kg theoretical lift gives a 2:1 margin of about 312 kg for real part weights. The hard-anodized aluminium body with S45C hard-chrome plated 25 mm rod runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, from -20 to +70 C.
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X125-100S Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X125-100S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 125 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 ACEJ125X125-100S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -100 | 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 ACEJ125X125-100S Is Used
Heavy jig clamping
With about 3680 N of usable push at 0.5 MPa, the 125 mm bore clamps large weld fixtures or machining jigs, and the 100 mm window lets one cylinder serve several fixture heights.
Short-stroke press station
Trim the extend stroke down to 25 mm for a compact marking or staking press inside a guarded cell where a full-length profile cylinder would never fit.
Pallet lift-and-lower
The vertical-lift equivalent of about 312 kg with a 2:1 margin suits raising pallets or dies in packaging and machine-tool lines, with CMSE switches confirming end positions.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X125-100S the Right Cylinder?
At this bore size the step either way is large: a 100 mm bore pushes 3927 N at 0.5 MPa, while stepping up is not possible within the ACE range, so 125 mm is the top of the line. If your load needs less than about 3700 N of working force, the 100 mm bore will do the job in a smaller envelope. Remember the stop screw only shortens the extend stroke and is not a mid-stroke lock: on air loss the piston still drifts, so add a separate holding valve for suspended loads. FA flange or LB foot mountings bolt to the ISO 21287 face, and the fitted -S magnet accepts CMSE / DMSE switches. PT ports, female M16x2.0 rod thread.
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 ACEJ125X125-100S FAQ
At 0.5 MPa it pushes 6135.9 N and pulls 5890.5 N; at 0.7 MPa it pushes 8590.3 N and pulls 8246.7 N, with a theoretical maximum of 1251.4 kgf at 1.0 MPa. The -100 code gives a 100 mm adjustment window: an external stop screw shortens the 125 mm extend stroke to any length from 25 mm up. It is a mechanical end stop only, not a load-holding brake. Operating range is 0.15-1.0 MPa (22-145 psi) at 30-500 mm/s.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so a 125 mm bore fits tight frames. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be clamped anywhere along the body. FA flange and LB foot mountings plus I and Y rod knuckles bolt straight to the ISO 21287 face, and the fixed TPU bumper at each end absorbs end-of-stroke impact. Outline dimensions: confirm from datasheet.
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