Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X120-10S
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X120-10S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 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 ACEJ125X120-10S
The ACEJ125X120-10S is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 120 mm stroke by up to 10 mm on site, giving a usable range of 110-120 mm. At 125 mm bore it pushes 6135.9 N and pulls 5890.5 N at 0.5 MPa, rising to 8590.3 N at 0.7 MPa, with a theoretical peak of 1251.4 kgf at 1.0 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so this force class fits presses and gantries where a full-length cylinder will not.
Plan real work at roughly 3680 N (about 375 kgf) of push at 0.5 MPa rather than the full rating, which corresponds to lifting about 313 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a 25 mm S45C hard-chrome rod with a female M16x2.0 thread, and the -S magnet this model carries lets CMSE / DMSE switches report end positions. A fixed TPU bumper at each end absorbs end-of-stroke energy, and speed spans 30-500 mm/s.
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X120-10S Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X120-10S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 120 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 ACEJ125X120-10S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | Bore size in mm. |
| ×120 | Stroke length in mm. |
| -10 | 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 ACEJ125X120-10S Is Used
Heavy press and forming stations
Delivers 6135.9 N at 0.5 MPa for riveting, staking and crimping jigs on automotive lines, with the 10 mm window letting setup teams fine-trim the 120 mm stroke per die.
Pallet and container clamping
Clamps heavy pallets or weld fixtures in logistics and fabrication cells; the compact body fits inside guarding where an ISO 15552 profile cylinder would be about twice as long.
Lift-and-lower gantry modules
Raises parts of about 313 kg vertically with a 2:1 margin on the 25 mm hard-chrome rod; CMSE / DMSE switches on the -S magnet confirm top and bottom positions.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X120-10S the Right Cylinder?
At this bore size nothing smaller is listed in the ACEJ range, so size up only if 6135.9 N at 0.5 MPa is marginal for the job; otherwise stay at 125 mm and trim the stroke with the 10 mm window instead of over-sizing. 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 holding valve for suspended loads.
FA flange or LB foot mounting bolts to the ISO 21287 face, and I/Y rod knuckles suit pivoting tooling. The -S magnet is already fitted on this model, so CMSE / DMSE switches can be added without a special order.
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 ACEJ125X120-10S FAQ
At 0.5 MPa it pushes 6135.9 N and pulls 5890.5 N; at 0.7 MPa push is 8590.3 N and pull 8246.7 N, with a theoretical maximum of 1251.4 kgf at 1.0 MPa. The -10 code is a 10 mm adjustment window: an external stop screw shortens the 120 mm extend stroke by up to 10 mm, so the working range is 110-120 mm. It cannot lengthen the stroke past 120 mm, and the stop is not a load-holding brake.
It is an ISO 21287 compact cylinder, roughly 50% shorter in mounting length than an ISO 15552 profile cylinder, with a hard-anodized aluminium body, threaded aluminium covers and a fixed TPU bumper at both ends. Air supply is 0.15-1.0 MPa (22-145 psi), filtered to 40 um, with a 1/4" port and a female M16x2.0 rod thread. FA flange and LB foot mounts plus I/Y rod knuckles bolt to the standard face, and because the -S magnet is fitted, CMSE / DMSE reed or solid-state switches can be clipped on for position feedback.
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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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Most inquiries answered within 7-8 hours.
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