Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-100S
The AirTAC SAIJ40X155-100-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear mechanical stroke adjuster. It delivers 628N of pull force at 0.5 MPa and uses a PT tapered G1/4 port. By turning the rear stopper screw, you can trim the nominal 155mm stroke back by up to 100mm, creating a highly flexible 55-155mm usable travel window for precise end-position tuning without swapping hardware.
This specific SKU is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance and includes a built-in magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors. The extruded aluminum barrel incorporates sensor grooves on both sides, and the unit supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 omitting the FB, CA, CB, and CR brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 155 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 SAIJ40BX155-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×155 | 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 SAIJ40BX155-100S Is Used
End-Position Tuning
Dial in the exact clamping or ejection position during machine commissioning using the 55-155mm travel window, avoiding the need to machine custom spacers.
Product Changeover
Rapidly adapt the cylinder's stroke on automated lines when switching between different product sizes or packaging formats.
Washdown Automation
Leverage the SUS304 stainless steel rod and adjustable stroke for packaging machinery requiring corrosion resistance and flexible setup.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-100S the Right Cylinder?
Choose this 40mm bore adjustable cylinder when your application requires variable end-stops or frequent product-size changeovers, stepping down from a 50mm bore (which provides 825N pull at 0.5 MPa) to save space and air volume. The rear adjuster acts purely as a travel stop and deceleration point, meaning it does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series. To match this ISO 15552 interchangeable cylinder, confirm the 155mm nominal stroke, 100mm adjustment range, PT G1/4 port, and the -S magnet requirement.
Because the nominal stroke of 155mm exceeds 300mm only on larger frames, side-load is minimal here, but the M12x1.25 rod thread and 16mm rod diameter handle moderate side loads well. For any long unsupported travel, always use an external guide. The standard variable air cushions at both ends provide reliable end-of-stroke deceleration across the 30-800mm/s speed range.
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 SAIJ40BX155-100S FAQ
The cylinder has a rear stopper screw that allows you to shorten the effective stroke by up to 100mm. This creates a usable travel window of 55-155mm, letting you fine-tune the end position without adding external stops or changing the cylinder.
At a standard 0.5 MPa operating pressure, the SAIJ40X155-100-S provides 628N of push force and 528N of pull force. It can reach up to 1130N push force at 0.9 MPa.
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