This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX100H, 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 SI40BX100H
The AirTAC Airtac SI40 Standard Cylinder SI40BX100H 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 SAI40BX100H, 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 → SAI40BX100H
- 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 SI40BX100H
The AirTAC SI40BX100H is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 100mm stroke. Featuring a SUS304 stainless steel rod and Viton H high-temperature seals rated for 0 to 150 C, it delivers 628 N push force at 0.5 MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI40BX100H, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, and force.
The SAI40BX100H upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet and cannot support position sensing.
Airtac SI40 Standard Cylinder SI40BX100H Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX100H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX100H |
| 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 SAI40BX100H 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 SAI40BX100H 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 SI40BX100H
| 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 SI40BX100H Is Used
Stainless Rod Actuation
Ideal for moderate-force clamping tasks where the SUS304 rod resists moisture and the 628 N push force secures parts reliably.
High-Temperature Handling
The Viton H seal allows operation up to 150 C, making it suitable for moving lightweight components near drying ovens.
Mid-Stroke Transfer
Provides consistent 100mm linear movement for transferring 32 kg vertical loads in automated assembly lines.
Replacing the Airtac SI40 Standard Cylinder SI40BX100H with the SAI40BX100H
To replace the discontinued SI40BX100H, order the SAI40BX100H. Confirm the ISO 15552 mounting interface, 40mm bore, 100mm stroke, G1/4 port, and your specific mounting accessory (LB, FA, TC, etc.). Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; if sensing is required, specify an SAI40X100S equivalent. The -B rod option provides SUS304 stainless steel for corrosion resistance, while the -H Viton seal handles 0-150 C environments. For sizing, neighbouring bores are 32mm (402 N push @0.5 MPa) and 50mm (982 N push @0.5 MPa). A plain cylinder drifts on air loss; for load holding, use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX100H
- ✓ 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 SI40BX100H FAQ
Yes, the SI40BX100H is discontinued. The direct replacement is the SAI40BX100H. It shares the identical ISO 15552 mounting interface, 40mm bore, 100mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/4 port. It generates 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 SAI40BX100H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX100H replacement — usually within 7-8 hours.