Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-10S
The AirTAC SAIJ40X270-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 270 mm stroke back by up to 10 mm. This creates a precise 260-270 mm usable travel window, enabling fine end-position tuning at commissioning without swapping the barrel or adding external stops. It delivers 879 N of push force at 0.7 MPa and uses a G1/4 port.
This variant is equipped with a SUS304 stainless steel rod (option B) for superior corrosion resistance and includes a magnet for position sensing. The extruded aluminum barrel integrates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. Because the rear adjuster acts purely as a travel stop, it does not hold the load without live air; for dead-end holding, consider SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 270 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 SAIJ40BX270-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×270 | 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 SAIJ40BX270-10S Is Used
Variable End-Stop Tuning
Dial in the exact 260-270 mm retract distance during machine commissioning to accommodate different material thicknesses without disassembling the line.
Product Size Changeover
Quickly adjust the stroke stop when switching product formats on a conveyor, using the rear screw to set new end positions rapidly.
Corrosive Environment Automation
Leverage the SUS304 stainless steel rod in washdown or corrosive manufacturing settings while maintaining precise stroke limits.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-10S the Right Cylinder?
Choose this 40 mm bore when 628 N of push force at 0.5 MPa is sufficient, or step up to the 50 mm bore (982 N at 0.5 MPa) if your payload increases. An adjustable stroke is ideal for machine setups requiring variable end-stops during product changeovers, whereas a fixed SAI cylinder locks you into one exact dimension.
This SAIJ40X270-10-S includes a -S magnet for CMSE/DMSE sensors and uses PT tapered port threads. It supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) omitting FB, CA, CB, and CR. Since the 270 mm stroke is 270 mm or greater, ensure you use an external guide to prevent excessive side-loading on the 16 mm rod and M12x1.25 thread.
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 SAIJ40BX270-10S FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 270 mm nominal stroke by up to 10 mm, providing a usable travel window of 260-270 mm. It only sets the end position and does not lock the load without live air pressure.
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