Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75
The AirTAC SAIJ40X135-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 135 mm stroke that can be fine-tuned down by up to 75 mm, yielding a highly flexible 60-135 mm usable travel window. Delivering 879 N of push force at 0.7 MPa, it is built with a SUS304 stainless steel rod and PT tapered port threads.
This adjustable stopper allows operators to dial in exact end positions during commissioning or product changeovers without swapping the cylinder. The extruded aluminum barrel includes sensor grooves on both sides for adding CMSE or DMSE switches, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 135 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 SAIJ40BX135-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×135 | 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 SAIJ40BX135-75 Is Used
Product Changeovers
Quickly adapt the cylinder's end position for different product sizes on a packaging line without changing hardware.
Machine Setup
Fine-tune the 60-135 mm travel window during initial commissioning to achieve exact positioning without external stops.
Variable End Stops
Dial in the precise retraction point for delicate picking and placing operations that require flexible stroke limits.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75 the Right Cylinder?
Select this 40 mm bore when an application requires variable end-stops within a 60-135 mm range, stepping up from a 32 mm bore (402 N push at 0.5 MPa) to gain rigidity via its 16 mm rod and M12x1.25 thread. The rear adjuster acts strictly as a travel stop to set deceleration, not a lock; it will not hold a load without live air, so consider a SAIL or BSAI cylinder if true load-holding is required. To match this ISO 15552 interchangeable unit, confirm the 135 mm stroke, 75 mm adjustment, PT port, and mounting style.
Because the 135 mm stroke is relatively short, side-load risks are minimal, but an external guide is always recommended for heavy lateral loads. The SUS304 rod material offers superior corrosion resistance compared to standard carbon steel, making it ideal for harsher environments.
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 SAIJ40BX135-75 FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 75 mm from the 135 mm nominal length, creating a 60-135 mm travel window. It functions as a mechanical stop to set the end position and does not lock the load without air pressure.
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s.
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