This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX95, 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 SI40BX95
The AirTAC Airtac SI40 Standard Cylinder SI40BX95 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 SAI40BX95, 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 → SAI40BX95
- 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 SI40BX95
The AirTAC SI40BX95 is a discontinued double-acting ISO 15552 profile cylinder featuring a 40mm bore, 95mm stroke, and a SUS304 stainless piston rod. Delivering 628 N push force at 0.5 MPa, it is replaced by the SAI40BX95 direct equivalent. This upgrade shares the exact G1/4 port, M12x1.25 thread, and ISO 15552 mounting interface.
The SAI replacement upgrades longevity with two Y-shaped one-way piston seals for low start-up pressure. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors; for load holding, use an external rod lock or SAIL variant.
Airtac SI40 Standard Cylinder SI40BX95 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX95 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX95 |
| 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 SAI40BX95 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 SAI40BX95 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 SI40BX95
| 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 SI40BX95 Is Used
Stainless Rod Actuation
Ideal for light machinery requiring a SUS304 rod for corrosion resistance, delivering 628 N push force for clamping or indexing tasks.
Package Diversion
Provides reliable 95mm stroke diversion on packaging lines, handling loads safely up to 377 N without position sensing.
Fixture Ejection
Ejects machined parts from fixtures using 528 N pull force, dropping directly into existing ISO 15552 mounting blocks.
Replacing the Airtac SI40 Standard Cylinder SI40BX95 with the SAI40BX95
To replace the SI40BX95, order the SAI40BX95. Confirm the ISO 15552 mounting interface, 40mm bore, 95mm stroke, G1/4 port, and SUS304 rod. Because this SKU lacks a magnet (-S), it cannot support position sensing. If you need more force, the 50mm bore offers 982 N push at 0.5 MPa; if less is acceptable, the 32mm bore provides 402 N. The air cushion only decelerates the load; it does not hold position. For secure load holding on air loss, specify an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX95
- ✓ 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 SI40BX95 FAQ
Yes, the SI40BX95 is discontinued. The direct replacement is the SAI40BX95, which shares the same ISO 15552 mounting interface, 40mm bore, 95mm stroke, G1/4 port, and force ratings.
It features a G1/4 port, M12x1.25 rod thread, and 27mm cushions. Force output is 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.
Request a Quote for the SAI40BX95
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX95 replacement — usually within 7-8 hours.