This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X435S, 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 SI100 Standard Cylinder SI100X435S
The AirTAC Airtac SI100 Standard Cylinder SI100X435S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 435mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X435S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke435 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X435S
- 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 SI100 Standard Cylinder SI100X435S
The AirTAC SI100X435S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 435mm stroke, and a G1/2 port. Delivering 3927 N of push force at 0.5 MPa, it is replaced by the direct replacement SAI100X435S, which shares identical mounting, bore, stroke, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. This -S SKU includes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X435S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X435S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X435S |
| Bore size | Ø100 mm |
| Stroke | 435 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100X435S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100X435S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100X435S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×435 | 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 SI100 Standard Cylinder SI100X435S Is Used
Heavy-Duty Pressing
Applies up to 7068 N of thrust at 0.9 MPa for seating bearings, stamping light components, or actuating heavy clamps in automated machinery.
Pallet Diversion
Uses the 435mm stroke to push heavy pallets or workpieces cleanly across transfer lines without requiring excessive footprint.
Vertical Lift Gates
Lifts materials or access gates up to 200 kg safely, leveraging the 100mm bore's robust pull force and integrated magnet for position feedback.
Replacing the Airtac SI100 Standard Cylinder SI100X435S with the SAI100X435S
To replace the SI100X435S, order the SAI100X435S to retain the exact ISO 15552 mounting interface, 100mm bore, 435mm stroke, G1/2 port, and M20x1.5 rod thread. When sizing, neighboring bores offer different force classes: an 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore yields 6136 N. For this 435mm stroke, add external guides to prevent rod bending and side-load wear. 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 load holding. Confirm your port thread (PT/G/NPT) and mounting accessory (LB, FA, TC, etc.) when ordering.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X435S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100X435S FAQ
Yes, the SI100X435S is discontinued. The direct replacement is the AirTAC SAI100X435S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 435mm stroke, G1/2 port, output force, and mounting interface.
This 100mm bore cylinder features a G1/2 air port. It delivers a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa, the push force is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X435S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X435S replacement — usually within 7-8 hours.