Airtac ACE Compact Cylinder ACE25X55
The AirTAC Airtac ACE Compact Cylinder ACE25X55 is a genuine double acting ISO 21287 compact air cylinder with a Ø25mm bore and 55mm stroke, M5×0.8 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.
- BoreØ25 mm
- Stroke55 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM6×1.0
- 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 ACE25X55
This AirTAC ACE25X55 is a double acting ISO 21287 compact cylinder with a 25 mm bore and 55 mm stroke, delivering 245.4 N of push force at 0.5 MPa. Its short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, making it ideal for tight spaces in automated assembly jigs and guarding systems.
The hard-anodized aluminium body and S45C hard-chrome plated rod resist wear in high-cycle applications. A fixed TPU bumper at both ends absorbs end-of-stroke impact, and the M5x0.8 port suits small-bore pneumatic circuits. For a safe working load, plan for about 147 N (roughly 15 kg) of real work at 0.5 MPa, not the full rating, so you can match it to actual part weights in your fixture.
Airtac ACE Compact Cylinder ACE25X55 Technical Specifications
| Model | Airtac ACE Compact Cylinder ACE25X55 |
|---|---|
| Series | ACE compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø25 mm |
| Stroke | 55 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 150 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 ACE25X55
| ACE | ISO 21287 compact cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×55 | 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 ACE25X55 Is Used
Fixture Clamping
Use in a CNC fixture to clamp small aluminium parts during drilling, with 245.4 N push holding the workpiece firmly against a stop.
Carton Tabbing
Drive a tab-folding mechanism on a packaging line, where the 55 mm stroke and compact body fit between conveyor rails and the 206.2 N pull retracts the tab quickly.
Guard Door Interlock
Actuate a safety guard latch on a small press, using the 25 mm bore's 245.4 N push to engage the lock and the TPU bumper to soften the final 5 mm of travel.
Is the Airtac ACE Compact Cylinder ACE25X55 the Right Cylinder?
For lighter duty, the ACE20X55 offers 157.1 N push at 0.5 MPa, while stepping up to the ACE32X55 gives 402.1 N push for heavier clamping or pressing tasks. Since this model has no magnet (no -S code), CMSE or DMSE sensors cannot be mounted; order the ACE25X55S if you need position sensing. The female M6x1.0 rod thread suits clevis or knuckle attachments, and the ISO 21287 face accepts FA, LB, CA, or SDB mounting brackets for standard fixtures.
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 ACE25X55 FAQ
At 0.5 MPa, push is 245.4 N and pull is 206.2 N. At 0.7 MPa, push rises to 343.6 N and pull to 288.6 N. The theoretical maximum force is 50.1 kgf at 1.0 MPa. Operating pressure range is 0.15-1.0 MPa (22-145 psi), with proof pressure at 1.5 MPa (215 psi).
No, this model has no magnet because it lacks the -S code. The magnet is optional and must be ordered as ACE25X55S to enable CMSE or DMSE reed or solid-state switches. Without the -S option, there is no magnet and no sensor can be fitted. The fixed TPU bumper only absorbs end-of-stroke impact; it does not lock or hold the rod.
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1-Year Warranty
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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