This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX95S, 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 SI40BX95S
The AirTAC Airtac SI40 Standard Cylinder SI40BX95S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 95mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX95S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke95 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX95S
- 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 SI40BX95S
The AirTAC SI40BX95S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore, 95mm stroke, and a SUS304 stainless steel rod. Delivering 628 N push at 0.5 MPa, it is replaced by the SAI40BX95S. This direct successor shares the exact ISO 15552 mounting interface, G1/4 port, and force ratings.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current switches. For high heat, Viton H seals raise the -20 to +70 C range up to 150 C.
Airtac SI40 Standard Cylinder SI40BX95S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX95S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX95S |
| Bore size | Ø40 mm |
| Stroke | 95 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 SAI40BX95S 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 SAI40BX95S 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 SI40BX95S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×95 | 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 SI40BX95S Is Used
Stainless Rod Diverters
The SUS304 rod handles washdown environments while providing 528 N pull force at 0.5 MPa for diverting packages on a conveyor line.
Light Duty Pressing
Apply up to 879 N of push force at 0.7 MPa for seating bearings or light assembly presses within a 95 mm working distance.
Replacing the Airtac SI40 Standard Cylinder SI40BX95S with the SAI40BX95S
To replace the SI40BX95S, order the SAI40BX95S. Confirm the ISO 15552 mounting interface, the 95mm stroke, G1/4 port, and your mounting accessory (LB, FA, TC, etc.). The -S magnet enables CS1-B/DS1-B sensors, and the -B rod is SUS304 stainless steel. Sizing both ways: a 50mm bore gives 982 N [email protected], while a 32mm bore yields 402 N. For load holding, note that a plain cylinder drifts on air loss—the cushion only decelerates. Use an external pilot check valve or the SAIL/BSAI lock variants. The 16mm rod and 27mm cushion are unchanged.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX95S
- ✓ 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 SI40BX95S FAQ
Yes, the SI40BX95S is discontinued. The direct replacement is the SAI40BX95S. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 95mm stroke, G1/4 port, and mounting interface.
The G1/4 port bore delivers 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical max of 128 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX95S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX95S replacement — usually within 7-8 hours.