Airtac SAIJ40 Adjustable Cylinder SAIJ40BX650-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX650-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 650mm 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
- Stroke650 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX650-10S
The AirTAC SAIJ40X650-10-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a push force of 628 N at 0.5 MPa and operates at speeds of 30-800 mm/s. The integrated -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches. Built with a SUS304 stainless steel rod, it suits environments demanding higher corrosion resistance.
This model provides a 640-650 mm usable travel window, allowing you to dial back the nominal 650 mm stroke by up to 10 mm. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without adding external stops. It does not hold the load without live air; for dead-load holding, consider an external rod lock or the AirTAC SAIL series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX650-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX650-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 650 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 SAIJ40BX650-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×650 | 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 SAIJ40BX650-10S Is Used
Machine Changeover
Quickly fine-tune the retract end-stop by up to 10 mm during product size changes without replacing the entire cylinder or re-engineering fixed external stops.
End-Position Calibration
Perfectly dial in the 640-650 mm travel window during commissioning to ensure precise tooling contact, compensating for mechanical tolerances on the line.
Corrosive Assembly Lines
The SUS304 stainless steel rod provides enhanced corrosion resistance for manufacturing environments requiring frequent washdowns or exposure to mild chemicals.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX650-10S the Right Cylinder?
Choose this adjustable-stroke cylinder when your machine setup requires precise end-position tuning during commissioning or product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder. If your application needs less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa; for higher loads, a 50 mm bore provides 982 N. This SAIJ variant features a PT tapered port thread and uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets.
Because the 650 mm stroke is relatively long, the 16 mm rod and M12x1.25 thread still require external guidance to prevent side-load damage on unsupported loads. Dimensionally interchangeable per ISO 15552, this cylinder integrates seamlessly into standard setups.
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 SAIJ40BX650-10S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides a push force of 628 N and a pull force of 528 N. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw lets you mechanically trim the effective travel back from the 650 mm nominal stroke down to 640 mm. This creates a 10 mm tuning window for precise end-position calibration without swapping the cylinder.
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