Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100
The AirTAC SAIJ40X135-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 135 mm travel back by up to 100 mm. This creates a highly flexible 35-135 mm usable window, letting you dial in the exact end position at commissioning without swapping hardware. It delivers 628 N of push force at 0.5 MPa, making it a solid mid-range choice for general automation.
This SKU is built with a SUS304 stainless steel rod (code B) for superior corrosion resistance in washdown or chemically active environments. It uses PT tapered port threads and operates at speeds between 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount CMSE reed or DMSE electronic switches later if positioning feedback becomes necessary.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 135 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 SAIJ40BX135-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×135 | 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 SAIJ40BX135-100 Is Used
Machine Changeover
Quickly reconfigure the 35-135 mm travel window during product size changeovers without physically replacing the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stroke during initial commissioning to perfectly align tooling, absorbing minor mechanical tolerances in the fixture design.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in packaging or processing lines where moisture or mild chemicals are present.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100 the Right Cylinder?
Choose this 40 mm bore when a 32 mm cylinder (providing 402 N push at 0.5 MPa) lacks the necessary thrust, but you want to avoid the larger footprint of a 50 mm unit. The 100 mm adjustment range is exceptionally wide, making this cylinder perfect for machines running multiple product sizes, as the retract end-stop can be reconfigured quickly during changeovers.
When ordering a replacement, confirm the 40 mm bore, 135 mm nominal stroke, 100 mm adjustment code, PT port thread, and SUS304 (B) rod material. Because the nominal stroke is 135 mm, ensure your mounting choice from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2) adequately supports the load to prevent side-loading on the rod. Note that the rear adjuster acts only as a travel stop; it will not hold the load without live air pressure, so consider an external rod lock or SAIL cylinder if dead-load holding is required.
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 SAIJ40BX135-100 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 879 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 100 mm. This means the 135 mm nominal stroke can be dialed down to any effective travel length between 35 and 135 mm to suit your application.
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