Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 260mm 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
- Stroke260 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-10S
The AirTAC SAIJ40X260-10-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 250 to 260 mm usable travel window, allowing you to dial back the nominal 260 mm stroke by up to 10 mm during commissioning without swapping the unit or adding external stops. It delivers 628 N of push force at 0.5 MPa and 879 N at 0.7 MPa.
Built with a SUS304 stainless steel rod and PT tapered ports, this extruded aluminum barrel model includes a magnet for CMSE reed and DMSE electronic sensors. The rear adjuster functions purely as a travel stop to fine-tune end positions; it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 260 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 SAIJ40BX260-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×260 | 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 SAIJ40BX260-10S Is Used
End-Position Tuning
Dial in the exact 250 to 260 mm travel distance during machine commissioning to perfect product placement without external stopper hardware.
Product Changeover
Quickly adjust the rear stopper by up to 10 mm to accommodate slight size variations on a production line, reducing setup downtime.
Precision Assembly
Leverage the SUS304 rod and 628 N force to press or position components accurately, using the fine stroke adjustment to prevent overtravel.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-10S the Right Cylinder?
Choose this 40 mm bore if your application requires roughly 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore that offers 402 N, or down from a 50 mm bore providing 982 N. The adjustable stroke is ideal for machine setups requiring variable end-stops or fine position tuning during product changeover, offering flexibility a fixed-stroke SAI cylinder cannot match. When replacing an ISO 15552 cylinder, verify the 260 mm stroke, 10 mm adjustment range, PT porting, and the -S magnet requirement.
Because the 260 mm stroke is substantial, the 16 mm rod and M12x1.25 thread provide rigidity, but an external guide is recommended for unsupported loads to prevent side-loading damage. The mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Operating speed ranges from 30 to 800 mm/s.
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 SAIJ40BX260-10S FAQ
At 0.5 MPa, this 40 mm bore cylinder 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 screw acts as a mechanical stop, allowing you to shorten the effective stroke from 260 mm down to 250 mm. It is a travel stop only and does not lock the load without live air pressure.
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