Airtac ACE Compact Cylinder ACE25X40B
The AirTAC Airtac ACE Compact Cylinder ACE25X40B is a genuine double acting ISO 21287 compact air cylinder with a Ø25mm bore and 40mm 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
- Stroke40 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 ACE25X40B
This AirTAC ACE25X40B is a double acting ISO 21287 compact cylinder with a 25 mm bore and 40 mm stroke, delivering 245.4 N of push force at 0.5 MPa. Its hard-anodized aluminium body is about 50% shorter than an ISO 15552 profile cylinder, so it fits into tight machine frames and guarding where a full-length unit will not. The male rod thread (B code) simplifies direct coupling to tooling without a rod-end adapter.
With a pull force of 206.2 N at 0.5 MPa, this unit is suited for light assembly tasks; for a 2:1 safety margin, plan to lift about 12.5 kg vertically (245.4 N divided by 9.81, then halved). The fixed TPU bumper at both ends absorbs end-of-stroke impact, and the M5x0.8 port keeps piping compact. Since this model has no -S code, there is no magnet fitted, so CMSE or DMSE sensors cannot be mounted unless you order the optional -S version.
Airtac ACE Compact Cylinder ACE25X40B Technical Specifications
| Model | Airtac ACE Compact Cylinder ACE25X40B |
|---|---|
| Series | ACE compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø25 mm |
| Stroke | 40 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 ACE25X40B
| ACE | ISO 21287 compact cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 ACE25X40B Is Used
Small Part Clamping
Use the ACE25X40B to clamp small plastic housings on a CNC fixture. The 245.4 N push at 0.5 MPa holds parts firmly, and the compact body fits under a low-profile workholding plate.
Light Conveyor Stop
Mount this cylinder on a packaging line to raise a stop pin for light cartons. The 40 mm stroke lifts the pin clear, and the fixed TPU bumper handles frequent cycles at speeds up to 500 mm/s.
Test Probe Actuation
Drive a spring-loaded test probe in an electronics bench fixture. The 206.2 N pull at 0.5 MPa retracts the probe reliably, and the short body saves space inside the test jig.
Is the Airtac ACE Compact Cylinder ACE25X40B the Right Cylinder?
For a lighter load, step down to the ACE20X40 with 157.1 N push at 0.5 MPa; for more force, the ACE32X40 offers 402.1 N push at 0.5 MPa. This 25 mm bore is a middle ground for small jigs and fixtures. The 40 mm stroke suits short transfer slides and clamping actions. Since this is a plain double acting cylinder, it will not hold position when air is removed - add a pilot check valve or rod lock if you must hold a load. The male rod thread (B) is ready for direct mounting, and the M5x0.8 port accepts standard fittings. No magnet is included, so order the -S code if you need position sensing with CMSE or DMSE switches.
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 ACE25X40B FAQ
At 0.5 MPa, push force is 245.4 N and pull force is 206.2 N. At 0.7 MPa, push is 343.6 N and pull is 288.6 N. The theoretical maximum force at 1.0 MPa is 50.1 kgf. These are for double acting operation, so air extends and retracts the rod.
No, not on this exact model. The ACE25X40B has no -S code, so there is no magnet inside the piston. CMSE or DMSE reed or solid-state switches require the optional -S magnet, which you must order separately. The cylinder body has slots for the switches, but the magnet is the key component.
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