Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-10S 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 SAIJ40BX275-10S
The AirTAC SAIJ40X275-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 275 mm nominal stroke that can be fine-tuned backward by up to 10 mm, yielding a precise 265-275 mm usable travel window for commissioning without external stops. Delivering 628 N of push force at 0.5 MPa, it fits mid-range pneumatic positioning tasks perfectly.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and includes a built-in magnet for position sensing. You can mount AirTAC CMSE reed or DMSE electronic solid-state switches directly into the sensor grooves machined on both sides of the extruded aluminum barrel. The PT tapered porting and integrated adjustable air cushions at both ends ensure reliable sealing and smooth end-of-stroke deceleration.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-10S |
|---|---|
| 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 SAIJ40BX275-10S
| 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 SAIJ40BX275-10S Is Used
Product Changeover
Dial in the 265-275 mm end position during format size changes on a packaging line without replacing the cylinder or adding external shims.
Assembly Positioning
Fine-tune the extend stroke on automated assembly stations to accommodate varying part heights and ensure precise component seating.
Diversion Gates
Adjust the retract stop distance on sorting diverters to handle different package profiles accurately on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-10S the Right Cylinder?
Select this 40 mm bore when an application requires more power than a 32 mm cylinder (which provides 402 N push at 0.5 MPa) but lacks the physical space for a 50 mm unit (982 N). The adjustable 265-275 mm travel window is ideal for machine setups requiring exact end-position tuning during product changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder. Because the stroke is 275 mm, ensure adequate external guiding to prevent excessive side-loading on the rod.
To match this ISO 15552 dimensionally interchangeable cylinder for a replacement, verify the 40 mm bore, 275 mm stroke, 10 mm adjustment range, PT G1/4 port thread, and the -S magnet option. Keep in mind the rear adjuster acts strictly as a travel stop and does not hold the load without continuous air pressure; for true load-holding, consider an external rod lock or the AirTAC SAIL series.
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 SAIJ40BX275-10S FAQ
It features a rear adjusting screw that allows you to shorten the effective stroke by up to 10 mm. This creates a 265-275 mm travel window, letting you fine-tune the end position at commissioning without changing the cylinder.
At 0.5 MPa operating pressure, it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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