Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X275-75S
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X275-75S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø125mm bore and 275mm 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
- Stroke275 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 ACEJ125X275-75S
The ACEJ125X275-75S 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 maximum of 1251.4 kgf at 1.0 MPa. The hard-anodized aluminium body carries a S45C hard-chrome plated 25 mm rod, and the short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so heavy clamping or pressing stations fit into frames that a full-length profile cylinder cannot.
The -75 code is a 75 mm adjustment window: an external stop screw trims the 275 mm extend stroke down to 200 mm on site, giving a usable 200-275 mm range without changing hardware. Plan on roughly 3682 N (about 375 kg) of real working force at 0.5 MPa, which corresponds to lifting around 313 kg vertically with a 2:1 margin. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches can be mounted on the body slots. Fixed TPU bumpers at both ends absorb end-of-stroke energy.
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X275-75S Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X275-75S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 275 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 ACEJ125X275-75S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | Bore size in mm. |
| ×275 | 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 ACEJ125X275-75S Is Used
Heavy press and forming fixtures
With 6135.9 N push at 0.5 MPa, the 125 mm bore drives stamping, riveting and crimping heads on automotive subassembly lines, and the 75 mm window lets technicians trim the 275 mm stroke to 200 mm for shallower dies.
Pallet and die cart actuation
The roughly 375 kg usable working force at 0.5 MPa lifts and positions die carts and pallet stops in warehouses, while the compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder inside guard frames.
Gate and clamp control on foundry equipment
Fixed to an LB foot or FA flange, the cylinder swings heavy foundry gates and mold clamps through 200-275 mm, with CMSE / DMSE switches on the -S magnet confirming open and closed positions for the PLC.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X275-75S the Right Cylinder?
Size this bore when your load needs more than the 981.7 N push of a 50 mm bore or the 2513.3 N push of an 80 mm bore at 0.5 MPa; if 6135.9 N is more than the job needs, the 100 mm bore at 3927.0 N push is the step down. Note that the stop screw is a mechanical end stop for the extend stroke only - it does not lock the piston mid-stroke, and on air loss the rod still drifts, so add a separate valve or lock for load holding. FA flange or LB foot mounting bolts to the ISO 21287 face, and the fitted -S magnet lets CMSE / DMSE switches report end positions. Air supply: 0.15-1.0 MPa (22-145 psi), filtered to 40 um, speed 30-500 mm/s.
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 ACEJ125X275-75S FAQ
At 0.5 MPa it pushes with 6135.9 N and pulls with 5890.5 N; at 0.7 MPa those figures rise to 8590.3 N push and 8246.7 N pull. The theoretical maximum at 1.0 MPa is 1251.4 kgf. In practice plan on about 3682 N (roughly 375 kg) of working force at 0.5 MPa, enough to lift about 313 kg vertically with a 2:1 margin. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), and speed 30-500 mm/s.
The -75 code sets a 75 mm adjustment window: an external stop screw shortens the 275 mm extend stroke by up to 75 mm, so the working range is 200-275 mm. The stop is a mechanical end stop, not a mid-stroke lock - the rod still drifts if air is lost. This version carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount in the body slots for end-position sensing. The fixed TPU bumpers at each end absorb end-of-stroke energy, and FA flange or LB foot mounting bolts straight to the ISO 21287 face.
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