This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX350S, 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 SI100BX350S
The AirTAC SI100 Standard Cylinder SI100BX350S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX350S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX350S
- 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 SI100BX350S
The AirTAC SI100BX350S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 350mm stroke. It delivers 3927N push force at 0.5MPa through a G1/2 port. The direct replacement is the SAI100BX350S, matching the interface, stroke, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. This -B model has a SUS304 stainless rod, and the -S magnet works with CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100BX350S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX350S |
| Bore size | Ø100 mm |
| Stroke | 350 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 SAI100BX350S 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 SAI100BX350S 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 SI100BX350S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×350 | 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 SI100BX350S Is Used
Heavy-Duty Pressing
Drives robust pressing and forming stations requiring 3927N of push force at 0.5MPa.
Pallet Diversion
Actuates heavy pallet stops and diverter arms along high-throughput material handling lines.
Replacing the Airtac SI100 Standard Cylinder SI100BX350S with the SAI100BX350S
To replace the SI100BX350S, order the SAI100BX350S. Verify the ISO 15552 mounting interface, 350mm stroke, G1/2 port, and SUS304 rod (-B). The built-in magnet (-S) uses legacy CS1-B/DS1-B switches, while the SAI family uses current AirTAC sensors. If sizing up or down, note the 80mm bore offers 2513N push, and the 125mm bore offers 6136N push at 0.5MPa. A plain cylinder drifts without air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant. At 350mm stroke, use external guides to prevent rod-bending side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX350S
- ✓ 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 SI100BX350S FAQ
Yes, the SI100BX350S is discontinued. The direct replacement is the SAI100BX350S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 350mm stroke, force, G1/2 port, and mounting fixtures.
This double-acting cylinder has a G1/2 port. It delivers 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX350S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX350S replacement — usually within 7-8 hours.