Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100 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 SAIJ40BX275-100
The AirTAC SAIJ40X275-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to 175 mm from its 275 mm nominal stroke. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. This configuration is ideal for environments requiring high cleanliness or moisture exposure.
Because the adjuster acts purely as a mechanical stop at the retract end, it does not hold the load without live air pressure. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily add CMSE reed or DMSE electronic sensors if position feedback is needed later. The integrated adjustable air cushions at both ends ensure smooth deceleration across the 30-800 mm/s speed range.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100 |
|---|---|
| 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 SAIJ40BX275-100
| 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 SAIJ40BX275-100 Is Used
Machine Commissioning
Dial in the exact retract end-position during setup using the 100 mm adjustment window, avoiding the need to swap cylinders or bolt on external stops.
Product Size Changeover
Quickly adapt the travel window from 175 mm to 275 mm when running different product lengths on the same conveyor or clamping line.
Washdown Handling
Leverage the SUS304 stainless steel rod for pushing and pulling tasks in food processing or humid environments where standard carbon steel rods would corrode.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-100 the Right Cylinder?
Selecting this 40 mm bore model gives you 628 N of push force at 0.5 MPa, offering a middle ground between the lighter 32 mm bore (402 N) and the heavier 50 mm bore (982 N). The massive 100 mm adjustment window is the primary reason to choose this over a fixed-stroke SAI cylinder, enabling extreme flexibility during machine commissioning or when accommodating multiple product sizes on the same line without swapping hardware.
For any application using a 275 mm stroke, it is critical to add an external guide to handle side loads, as the 16 mm rod and M12x1.25 thread can only support so much lateral stress. Remember that the rear adjuster is a travel stop, not a locking device; if you need true load-holding without live air, consider the SAIL or BSAI series. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable with ISO 15552 cylinders.
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 SAIJ40BX275-100 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N of push force at 0.9 MPa.
A rear-mounted adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke by up to 100 mm. This creates a usable travel window of 175 mm to 275 mm without changing the cylinder itself.
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