Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-20S 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 SAIJ40BX165-20S
The AirTAC SAIJ40X165-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 145 to 165 mm, enabling precise end-position tuning at commissioning without swapping out the unit or adding external stops. The 40 mm bore generates 628 N of push force at 0.5 MPa, making it well-suited for mid-range automation tasks.
This configuration includes a SUS304 stainless steel rod for superior corrosion resistance and a built-in magnet (-S) for position sensing. It is designed to work seamlessly with AirTAC CMSE reed and DMSE electronic sensors fitted into the dual-side barrel grooves. The mounting interface covers Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR mounts.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-20S |
|---|---|
| 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 SAIJ40BX165-20S
| 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 SAIJ40BX165-20S Is Used
Machine Changeover
Dial in the 145-165 mm travel window during product size transitions without replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract end-position at commissioning to absorb mechanical tolerances and achieve precise locating of 628 N loads.
Variable End-Stops
Set custom travel limits for multi-tier assembly lines using the rear stopper screw, paired with DMSE solid-state sensors.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-20S the Right Cylinder?
Select this 40 mm bore when an application requires 628 N push force at 0.5 MPa, or step down to a 32 mm bore (402 N) for lighter duties and up to a 50 mm bore (982 N) for heavier loads. The adjustable stroke is chosen over a fixed SAI cylinder when machine setups require variable end-stops or product changeovers demand quick travel retuning.
For any stroke length of 300 mm or more, an external guide is recommended to handle side loads due to the 16 mm rod diameter. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider an external pilot-operated check valve. This cylinder uses PT tapered ports and is dimensionally interchangeable with ISO 15552 cylinders.
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 SAIJ40BX165-20S FAQ
The rear adjuster screw acts as a mechanical stop that allows you to shorten the effective stroke by up to 20 mm. This provides a usable travel window of 145 to 165 mm, enabling fine-tuning of the end position at commissioning without changing the cylinder.
At 0.5 MPa, the SAIJ40X165-20-S provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.