Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 25mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke25 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S
The AirTAC SAIJ40X25-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 15 to 25 mm for precise end-position tuning. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and features a PT tapered port thread. An integrated magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches.
This adjustable-stroke design allows you to trim the retract position at commissioning without adding external stops or swapping the cylinder. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure. It utilizes a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S Is Used
Precision Component Clamping
Dial in the exact 15 to 25 mm clamping depth during machine setup to accommodate varying material thicknesses without changing hardware.
Automated Insertion Stops
Fine-tune the retract end-position for delicate part insertion processes, ensuring accurate placement without over-travel.
Product Size Changeover
Quickly adjust the stroke window on packaging or assembly lines when switching between different product sizes.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S the Right Cylinder?
Choose this 40 mm bore when you need more thrust than a 32 mm cylinder (which provides 402 N push at 0.5 MPa) but want a more compact footprint than a 50 mm option (982 N). The adjustable 15-25 mm window is ideal for applications requiring exact variable end-stops during machine setup or product changeover, rather than committing to a fixed 25 mm SAI cylinder. For exact ISO 15552 replacement matching, verify the 40 mm bore, 25 mm stroke, 10 mm adjustment, PT port thread, and the -S magnet requirement.
Because the stroke is only 25 mm, side-loading risks are minimal, but always ensure the load is guided to prevent binding. Remember that the rear adjuster is a travel stop, not a lock; if your application requires true load-holding without continuous air pressure, consider an AirTAC SAIL or BSAI cylinder instead.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX25-10S FAQ
At a standard 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to mechanically shorten the nominal 25 mm stroke by up to 10 mm, creating a usable travel window of 15 to 25 mm. It functions as a hard stop for end-position tuning and does not lock the load without live air pressure.
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