Airtac ACE Compact Cylinder ACE125X20B
The AirTAC Airtac ACE Compact Cylinder ACE125X20B is a genuine double acting ISO 21287 compact air cylinder with a Ø125mm bore and 20mm 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
- Stroke20 mm
- Port size1/4"
- Acting typeDouble acting
- 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 ACE Compact Cylinder ACE125X20B
This AirTAC ACE125X20B is a double acting compact cylinder that uses air to both extend and retract its 25 mm rod. With a 125 mm bore it delivers a powerful 6135.9 N push and 5890.5 N pull at 0.5 MPa, making it a heavy-duty choice for large automation frames.
Its ISO 21287 short body is about 50% shorter than an ISO 15552 profile cylinder, so it fits into tight press guards and gantries where a full-length unit will not. The male rod thread (B code) simplifies direct coupling, and the hard-anodized aluminium body with S45C hard-chrome rod resists wear in continuous cycling. For a real-world margin, plan for about 375 kg of safe vertical work at 0.5 MPa, not the full theoretical rating.
Airtac ACE Compact Cylinder ACE125X20B Technical Specifications
| Model | Airtac ACE Compact Cylinder ACE125X20B |
|---|---|
| Series | ACE compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø125 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| 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 ACE Compact Cylinder ACE125X20B
| ACE | ISO 21287 compact cylinder (double-acting). |
|---|---|
| 125 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| 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 ACE Compact Cylinder ACE125X20B Is Used
Heavy Press Guard
Mount this 125 mm bore cylinder inside a press guard frame to drive a heavy safety door. Its 6135.9 N push at 0.5 MPa moves large steel panels, while the short body keeps the guard profile slim.
Large Part Clamping
Use in a fixture that clamps large automotive castings during machining. The 5890.5 N pull at 0.5 MPa holds parts firmly, and the fixed TPU bumper absorbs the end-of-stroke impact without shock to the workpiece.
Gantry Z-Axis Lift
In a gantry pick-and-place system, this cylinder can lift about 375 kg vertically with a 2:1 safety margin. Its compact body reduces the overall gantry height, and the male rod thread allows direct attachment to a lifting yoke.
Is the Airtac ACE Compact Cylinder ACE125X20B the Right Cylinder?
For a lighter load, consider the ACE100X20 with 3927.0 N push at 0.5 MPa, or step down to the ACE80X20 at 2513.3 N. This 125 mm bore version suits heavy clamping or pressing tasks where force matters more than speed. Note that without the optional -S magnet, no CMSE or DMSE sensors can be fitted, so order the -S code if you need position sensing.
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 ACE Compact Cylinder ACE125X20B FAQ
At 0.5 MPa, push is 6135.9 N and pull is 5890.5 N. At 0.7 MPa, push rises to 8590.3 N and pull to 8246.7 N. The theoretical maximum force is 1251.4 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) with a proof pressure of 1.5 MPa (215 psi).
The ACE125X20B has a short body that saves about 50% of the mounting length compared to an ISO 15552 profile cylinder. This lets you fit it into confined areas like machine guards or gantries. The fixed TPU bumper at both ends absorbs end-of-stroke energy, and the optional -S magnet enables CMSE or DMSE sensors for position feedback.
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