Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75S 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 SAIJ40BX135-75S
The AirTAC SAIJ40X135-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a generous 75mm adjustment range, allowing you to dial the effective travel down anywhere between 60mm and 135mm. This wide window is perfect for equipment that processes multiple product sizes, letting operators reposition the end-stop during changeovers without swapping hardware.
Built with a SUS304 stainless steel rod for superior corrosion resistance, this model includes a magnet for position sensing. The extruded aluminum barrel houses sensor grooves on both sides, accepting AirTAC CMSE reed and DMSE electronic solid-state switches. It uses PT tapered ports sized G1/4 and relies on standard variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75S |
|---|---|
| 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 SAIJ40BX135-75S
| 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 SAIJ40BX135-75S Is Used
Product Changeovers
Quickly modify the cylinder's extension from 135mm down to 60mm to accommodate varying package lengths on a packaging line without changing the actuator.
Machine Setup Tuning
Fine-tune the exact end-of-stroke position during commissioning to perfect part ejection or pressing depth, avoiding the need for external mechanical shims.
Variable End Stops
Leverage the 75mm adjustment screw to create a variable hard stop for delicate positioning tasks where the final travel distance changes per workpiece.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-75S the Right Cylinder?
Select this 40mm bore cylinder when an application requires a highly flexible end-position within a 135mm envelope; stepping down to a 32mm bore drops the push force to 402N, while stepping up to a 50mm bore yields 982N. The adjustable rear stopper is strictly a travel end-stop that sets deceleration, not a lock; it cannot hold a load without live air pressure. For dead-load holding, integrate an external pilot-operated check valve or specify an AirTAC SAIL or BSAI cylinder.
To match this exact ISO 15552 interchangeable replacement, confirm the 40mm bore, 135mm nominal stroke, 75mm adjuster code, PT G1/4 port thread, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Because the 16mm rod and M12x1.25 thread carry moderate side loads, ensure external guiding if the tooling experiences heavy lateral forces.
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 SAIJ40BX135-75S FAQ
The rear adjuster acts as an external stopper that mechanically limits the piston's travel. For this model, you can trim the nominal 135mm stroke back by up to 75mm, creating an effective usable travel window between 60mm and 135mm.
Operating at 0.5 MPa, the SAIJ40X135-75-S generates 628N of push force and 528N of pull force. At a maximum pressure of 0.9 MPa, the push force increases to 1130N.
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