This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX100S, 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 SI100BX100S
The AirTAC SI100 Standard Cylinder SI100BX100S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 100mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX100S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX100S
- 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 SI100BX100S
The AirTAC SI100BX100S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 100 mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100BX100S, which matches the original bore, stroke, output force, and ISO 15552 mounting interface for seamless fixture integration.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The original SI100BX100S features a SUS304 stainless steel rod (B option) and a piston magnet (S) for CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100BX100S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX100S |
| Bore size | Ø100 mm |
| Stroke | 100 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 SAI100BX100S 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 SAI100BX100S 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 SI100BX100S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | 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 SI100 Standard Cylinder SI100BX100S Is Used
Heavy-Duty Pressing
Applies the 5497 N push force at 0.7 MPa to seat bearings and assemble heavy mechanical components securely.
Pallet Handling
Drives robust lifting arms in automated storage systems, moving loads safely within the 200 kg vertical lift margin.
Material Forming
Actuates large stamping and bending dies where the 100 mm bore and SUS304 stainless rod resist corrosion and wear.
Replacing the Airtac SI100 Standard Cylinder SI100BX100S with the SAI100BX100S
To replace the discontinued SI100BX100S, order the SAI100BX100S and confirm the ISO 15552 mounting interface, 100 mm stroke, G1/2 port, and mounting accessory. The SAI family also adds SAIL (air-released lock), SAIF (built-in 4M valve) and BSAI (clamp-lock) variants the SI lacked. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding use SAIL, BSAI, or an external pilot check valve. If downsizing, a 80 mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125 mm bore yields 6136 N. This 100 mm stroke is short, but for any stroke over 300 mm add a guide to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX100S
- ✓ 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 SI100BX100S FAQ
Yes, the SI100BX100S is discontinued. The direct replacement is the SAI100BX100S. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 100 mm stroke, force, G1/2 port, and mounting fixtures.
It features a G1/2 air port. The thrust is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa. The rod is 25 mm with an M20x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX100S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX100S replacement — usually within 7-8 hours.