Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X160-20S
The AirTAC Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X160-20S is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø125mm bore and 160mm 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
- Stroke160 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 ACEJ125X160-20S
The ACEJ125X160-20S is a double acting ISO 21287 compact cylinder with an adjustable extend stroke: an external stop screw trims the 160 mm stroke by up to 20 mm on site, giving a usable range of 140-160 mm. At the 125 mm bore it is the strongest model in the ACEJ family, pushing 6135.9 N and pulling 5890.5 N at 0.5 MPa, rising to 8590.3 N at 0.7 MPa. The hard-anodized aluminium body carries magnet slots along its length, and the -S code on this model means the magnet is fitted, so CMSE / DMSE reed or solid-state switches can be clipped on for end-of-stroke sensing.
In practice the 0.5 MPa push force supports roughly 3682 N of real work (about 375 kg), and with a 2:1 margin the rod lifts about 312 kg vertically - enough for heavy clamping fixtures, press heads and die-handling carts. The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so this force class fits inside presses and gantries that cannot accept a full-length profile cylinder. A fixed TPU bumper at each end absorbs end-of-stroke energy, the S45C hard-chrome rod resists wear, and speed runs 30-500 mm/s at 0.15-1.0 MPa (22-145 psi).
Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X160-20S Technical Specifications
| Model | Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X160-20S |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 160 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 ACEJ125X160-20S
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 125 | Bore size in mm. |
| ×160 | Stroke length in mm. |
| -20 | 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 ACEJ125X160-20S Is Used
Heavy fixture clamping on machining centres
With 6135.9 N push at 0.5 MPa (about 375 kg of usable clamping force), the 125 mm bore holds large cast-iron workpieces in 5-axis machining fixtures, and the 20 mm adjustment window lets the setter trim clamp travel to 140-160 mm without changing the cylinder.
Die and pallet lift-and-locate stations
The rod lifts about 312 kg vertically with a 2:1 margin, so stamping-die carts and heavy pallets can be raised onto locating pins; CMSE / DMSE switches on the fitted magnet confirm the up and down positions to the PLC.
Short-stroke press and riveting heads
Inside a compact press frame the short ISO 21287 body - roughly half the mounting length of an ISO 15552 profile cylinder - delivers 8590.3 N at 0.7 MPa for riveting, staking and marking operations where a full-length cylinder will not fit.
Is the Airtac ACEJ125 Adjustable Compact Cylinder ACEJ125X160-20S the Right Cylinder?
Size this bore when your load needs more than a 100 mm cylinder can give: the 100 mm bore pushes 3927.0 N at 0.5 MPa, while this 125 mm bore delivers 6135.9 N - about 56% more force in a body that is barely longer. If the load is lighter than 2400 N, step down to the 80 mm bore (2513.3 N at 0.5 MPa) and save air consumption. Remember the -20 stop screw only shortens the extend stroke; it is a mechanical end stop, not a mid-stroke lock, so on air loss the piston still drifts and a separate holding valve is needed for suspended loads.
Mount with FA flange or LB foot brackets on the ISO 21287 face, and add I or Y rod knuckles where side misalignment exists. The fitted -S magnet pairs with CMSE / DMSE switches; PT ports are standard and G threads can be ordered.
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 ACEJ125X160-20S 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 and pull to 8246.7 N, with a theoretical maximum of 1251.4 kgf at 1.0 MPa. The -20 code sets a 20 mm adjustment window: an external stop screw shortens the 160 mm extend stroke by up to 20 mm, so the working range is 140-160 mm. It cannot lengthen the stroke past 160 mm, and the stop is an end stop only - it never locks or brakes a load. Speed is 30-500 mm/s at 0.15-1.0 MPa (22-145 psi).
It is an ISO 21287 compact cylinder whose short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, with a hard-anodized aluminium body, S45C hard-chrome 25 mm rod and fixed TPU bumpers at both ends. The -S magnet on this model allows CMSE / DMSE reed or solid-state switches to be mounted anywhere along the body slots. FA flange and LB foot brackets bolt to the standard ISO 21287 face, and the rod end is female M16x2.0 with a 1/4" PT port.
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