This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX195S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI40 Standard Cylinder SI40BX195S
The AirTAC Airtac SI40 Standard Cylinder SI40BX195S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 195mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX195S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke195 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX195S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI40 Standard Cylinder SI40BX195S
The AirTAC SI40BX195S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore, 195mm stroke, and a SUS304 stainless piston rod. Generating 628N push force at 0.5MPa, it is replaced by the SAI40BX195S. This direct upgrade shares the same ISO 15552 mounting interface, G1/4 port, and M12x1.25 thread. The SAI features an upgraded piston seal with two Y-shaped elements for low start-up pressure and long life.
The -S magnet works with legacy CS1-B/DS1-B sensors. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For held loads, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants the SI lacked.
Airtac SI40 Standard Cylinder SI40BX195S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX195S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX195S |
| Bore size | Ø40 mm |
| Stroke | 195 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI40BX195S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAI40BX195S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI40 Standard Cylinder SI40BX195S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×195 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI40 Standard Cylinder SI40BX195S Is Used
Mid-Stroke Diverting
Pushes packages at 195mm stroke with adjustable 27mm cushions decelerating the 30-800mm/s speed at end caps.
Fixture Clamping
Clamps workholding fixtures with 528N pull force, requiring a pilot check valve to maintain grip during air loss.
Replacing the Airtac SI40 Standard Cylinder SI40BX195S with the SAI40BX195S
To replace the SI40BX195S, order the SAI40BX195S. Confirm the ISO 15552 interface, 40mm bore, 195mm stroke, G1/4 port, and mounting accessory. The -B rod is SUS304, and -S means a magnet for CS1-B/DS1-B switches. You can size both ways: step up to a 50mm bore for more force, or drop to 32mm. At 0.5MPa, the 40mm bore pushes 628N and pulls 528N. For stroke lengths at or above 300mm, add external guides to prevent rod bending and side-load wear. If you need load holding on air loss, the plain SAI will drift; specify an external pilot check valve or choose the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX195S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI40 Standard Cylinder SI40BX195S FAQ
Yes, the SI40BX195S is discontinued. The direct replacement is the SAI40BX195S. It shares the same ISO 15552 mounting interface, 40mm bore, 195mm stroke, 628N force, and G1/4 port, fitting existing fixtures perfectly.
The 40mm bore uses a G1/4 port. It generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX195S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX195S replacement — usually within 7-8 hours.