Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30 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 SAIJ40BX165-30
The AirTAC SAIJ40X165-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to trim the effective travel back by up to 30 mm. This specific SKU creates a usable stroke window of 135-165 mm, enabling precise end-position tuning at commissioning without swapping out the entire actuator. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it well-suited for moderate-duty handling tasks.
Equipped with a SUS304 stainless steel rod and PT tapered port threads, this 40 mm bore unit integrates seamlessly into existing pneumatic setups. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, though position detection requires adding a magnet. It is important to note that the rear adjuster acts strictly as a mechanical stop to set the travel limit, not as a locking device, meaning the cylinder cannot hold loads without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30 |
|---|---|
| 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 SAIJ40BX165-30
| 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 SAIJ40BX165-30 Is Used
Machine Changeover
Dial in the 135-165 mm travel window during product size changeovers to accommodate varying material lengths without installing external mechanical stops.
End-Position Tuning
Fine-tune the retract end position during initial commissioning to perfect the alignment of pick-and-place grippers or tooling heads.
Adjustable Ejection
Set the exact ejection distance on a packaging line, allowing operators to safely modify the stroke limit based on package dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30 the Right Cylinder?
Choose this adjustable-stroke model over a fixed-stroke SAI cylinder when your application requires variable end stops or frequent machine changeovers to accommodate slight differences in product sizing. If your process demands higher thrust, stepping up to the 50 mm bore yields 982 N of push force at 0.5 MPa; conversely, dropping to a 32 mm bore reduces the footprint but limits you to 402 N. Because this cylinder features a 165 mm stroke, standard side-load guidance is generally manageable, but always ensure the load is adequately supported to prevent excessive rod wear.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 165 mm stroke, 30 mm adjustment range, PT port threads, and SUS304 rod material. This unit supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. For applications requiring true load-holding without continuous air pressure, consider the SAIL or BSAI series, as the SAIJ adjuster and air cushions do not function as a brake.
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 SAIJ40BX165-30 FAQ
At an operating pressure of 0.5 MPa, the 40 mm bore provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the nominal 165 mm stroke by up to 30 mm, creating a usable travel window of 135 to 165 mm. It is a travel stop, not a lock, so the cylinder cannot hold a load without live air pressure.
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