This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX100SH, 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 SI40BX100SH
The AirTAC Airtac SI40 Standard Cylinder SI40BX100SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX100SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX100SH
- 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 SI40BX100SH
The AirTAC SI40BX100SH is a discontinued double-acting ISO 15552 profile cylinder featuring a 40mm bore, 100mm stroke, G1/4 port, and a SUS304 stainless steel rod. Delivering 628 N push force at 0.5 MPa, it is directly replaced by the SAI40BX100SH. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, output force, and porting for seamless fixture integration.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. This specific legacy unit includes the -H Viton seal (0-150 C high-temp) and -S magnet for CS1-B/DS1-B switches.
Airtac SI40 Standard Cylinder SI40BX100SH Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX100SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX100SH |
| Bore size | Ø40 mm |
| Stroke | 100 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 SAI40BX100SH 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 SAI40BX100SH 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 SI40BX100SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 SI40BX100SH Is Used
Stainless Rod Clamping
Leverages the SUS304 rod for corrosion resistance when clamping washed or chemically exposed parts in machining cells.
High-Temperature Forming
Uses the Viton H seal to withstand 0-150 C ambient heat near ovens or thermal forming equipment without degrading.
Mid-Range Diverting
Provides 628 N push at 0.5 MPa to actuate 100mm stroke diverters or gates on standard material handling lines.
Replacing the Airtac SI40 Standard Cylinder SI40BX100SH with the SAI40BX100SH
To replace the SI40BX100SH, order the SAI40BX100SH and confirm the ISO 15552 mounting interface, 100mm stroke, G1/4 port, and mounting accessory. Retain the -S magnet (current AirTAC switches replace the legacy CS1-B/DS1-B) and the -B SUS304 rod. The -H Viton seal raises operating temperature to 0-150 C. If downsizing, a 32mm bore yields 402 N push at 0.5 MPa; if upsizing, a 50mm bore yields 982 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX100SH
- ✓ 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 SI40BX100SH FAQ
Yes, the SI40BX100SH is discontinued. The direct replacement is the SAI40BX100SH. It shares the identical ISO 15552 mounting interface, 40mm bore, 100mm stroke, G1/4 port, and output force, fitting existing fixtures perfectly while upgrading the piston seal.
It features a G1/4 air port. The force ratings are: 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 maximum of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX100SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX100SH replacement — usually within 7-8 hours.