Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40S 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 SAIJ40BX165-40S
The AirTAC SAIJ40X165-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 165 mm stroke that can be dialed back by up to 40 mm, yielding a precise 125-165 mm usable travel window for fine-tuning end positions during commissioning. Delivering 628 N of push force at 0.5 MPa, it features a SUS304 stainless steel rod for superior corrosion resistance and operates at speeds between 30-800 mm/s.
This model includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic solid-state sensors housed in the dual-side extruded aluminum barrel grooves. The rear adjuster functions strictly as a mechanical stop to set the retraction end-point and relies on the integrated air cushion for deceleration; it is not a locking device and will not hold a load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40S |
|---|---|
| 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 SAIJ40BX165-40S
| 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 SAIJ40BX165-40S Is Used
Changeover Calibration
Dial in the 125-165 mm travel window during product size changeovers to perfectly position parts without machining new stopper blocks.
End-Position Tuning
Fine-tune the retraction end-point at machine commissioning using the rear adjuster, avoiding the need to physically swap out a fixed-stroke SAI cylinder.
Corrosion-Resistant Actuation
Leverage the SUS304 stainless steel rod in light manufacturing environments where moisture or minor chemicals would degrade standard carbon steel rods.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40S the Right Cylinder?
Choose this adjustable-stroke SAIJ variant when a machine requires variable end-stops or frequent product-size changeovers without physically swapping cylinders or adding external stopper blocks. If your application requires less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa, while stepping up to a 50 mm bore provides 982 N for heavier loads. Because the nominal stroke is 165 mm, side-loading is minimal, but always ensure the load is guided to prevent premature seal wear.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 40 mm bore, 165 mm nominal stroke, 40 mm adjustment range, PT tapered port thread, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, intentionally omitting FB, CA, CB, and CR mounts. For applications needing true load-holding without live air, consider the SAIL or BSAI series instead.
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 SAIJ40BX165-40S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. If operated 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 165 mm nominal stroke by up to 40 mm, creating a usable travel window of 125-165 mm. It sets the end position and relies on the air cushion for deceleration, but it does not lock or hold the load without live air pressure.
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