Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-50S
The AirTAC SAIJ40X165-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 879N push force at 0.7MPa and utilizes a PT tapered G1/4 port. The built-in adjuster allows you to dial back the 165mm nominal stroke by up to 50mm, creating a precise 115-165mm usable travel window for fine-tuning end positions during commissioning without swapping hardware.
This configuration includes a SUS304 stainless steel rod for superior corrosion resistance and an integrated magnet (-S) for position sensing. It is compatible with AirTAC CMSE reed switches and DMSE solid-state sensors fitted into the dual-side sensor grooves. The adjustable stopper solely manages end-of-travel deceleration alongside the standard air cushions, meaning it will not hold a load without continuous air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 165 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 SAIJ40BX165-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×165 | 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 SAIJ40BX165-50S Is Used
Machine Changeover
Dial in the 115-165mm travel window during product size transitions on a packaging line without replacing the cylinder or adding external stops.
End-Position Tuning
Fine-tune the retract end position at commissioning to absorb mechanical tolerances, using the rear screw to set the exact 165mm or shorter stroke.
Variable End Stops
Adjust the stroke dynamically for assembly processes that require differing insertion depths or actuation distances within the 50mm range.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-50S the Right Cylinder?
Select this 40mm bore unit when an application requires variable end-stops or frequent product changeovers, stepping up from a 32mm bore (563N push at 0.5MPa) if greater thrust is needed. The SUS304 rod and M12x1.25 thread provide excellent side-load resilience, though any stroke exceeding 300mm would still require an external guide. For load-holding without live air pressure, this cylinder is insufficient; consider the SAIL or BSAI series instead. To match this ISO 15552 replacement exactly, specify the 40mm bore, 165mm stroke, 50mm adjustment, PT port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and the -S magnet.
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 SAIJ40BX165-50S FAQ
At 0.7MPa operating pressure, this 40mm bore cylinder generates 879N of push force and 528N of pull force. It can reach a maximum push force of 1130N at 0.9MPa.
The rear adjuster acts as an external stopper that lets you shorten the 165mm nominal stroke by up to 50mm, providing a usable travel window of 115-165mm. It sets the end position but does not lock or hold the load without continuous air pressure.
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