Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100S
The AirTAC SAIJ40X275-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the effective travel by up to 100 mm. This creates a highly flexible 175 to 275 mm usable window, letting you fine-tune end positions during commissioning without swapping out the physical actuator. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it well-suited for moderate load handling.
This specific SKU features a SUS304 stainless steel rod for superior corrosion resistance and includes a built-in magnet for position sensing. The extruded aluminum barrel incorporates sensor grooves on both sides, directly supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It utilizes PT tapered ports and offers a standard mounting subset including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 275 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 SAIJ40BX275-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×275 | 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 SAIJ40BX275-100S Is Used
Product Changeovers
Dial in the 175-275 mm stroke window on the fly to accommodate varying package sizes on a packaging line without changing cylinders.
Machine Setup
Fine-tune the exact end-of-stroke position during commissioning to perfect pressing or locating tasks without adding external stopper blocks.
Variable End Stops
Adjust the retract distance dynamically for diverter gates or sorting mechanisms that require different travel lengths for distinct product types.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100S the Right Cylinder?
Choose this 40 mm bore when your application requires the 628 N push force at 0.5 MPa, stepping up from a 32 mm bore that provides 402 N, or down from a 50 mm bore that yields 982 N. The 100 mm adjustment range is ideal for machinery that frequently handles product-size changeovers, providing a variable end-stop without the need to bolt on external physical stops.
Because the nominal stroke is 275 mm, an external guide mechanism is recommended to prevent excessive side-loading on the rod. Remember that the rear adjuster acts only as a travel stop to set deceleration alongside the air cushions; it does not hold the load without live air pressure. For load-holding requirements without continuous pneumatic pressure, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 interchangeable unit, specify the 40 mm bore, 275 mm stroke, 100 mm adjust, PT G1/4 port, and the -S magnet option.
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 SAIJ40BX275-100S FAQ
At 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 shorten the 275 mm nominal stroke by up to 100 mm, providing an effective travel window of 175 to 275 mm. The adjuster acts as a mechanical stop and does not lock the load without live air pressure.
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