This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX270S, 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 SI100BX270S
The AirTAC Airtac SI100 Standard Cylinder SI100BX270S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 270mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX270S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX270S
- 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 SI100BX270S
The AirTAC SI100BX270S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 270mm stroke. It delivers 3927N push and 3681N pull at 0.5MPa, with a G1/2 port. The direct replacement is the SAI100BX270S, matching the interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This -B model has a SUS304 rod, -S magnet for CS1-B/DS1-B sensors, and Viton H seal option.
Airtac SI100 Standard Cylinder SI100BX270S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX270S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX270S |
| Bore size | Ø100 mm |
| Stroke | 270 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 SAI100BX270S 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 SAI100BX270S 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 SI100BX270S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×270 | 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 SI100BX270S Is Used
Heavy Press Clamping
Secures large metal castings during machining, utilizing the 3927N push force at 0.5MPa to hold components rigidly against cutting loads.
Automated Diversion
Actuates heavy-duty routing gates on high-speed packaging lines, with the 270mm stroke providing the reach needed to clear wide belts.
Replacing the Airtac SI100 Standard Cylinder SI100BX270S with the SAI100BX270S
To replace the SI100BX270S, order the SAI100BX270S. Verify the ISO 15552 mounting interface, 100mm bore, 270mm stroke, G1/2 port, and magnet. The SUS304 rod (-B) resists corrosion. Neighbouring bores: 80mm gives 2513N [email protected], 125mm gives 6136N. For strokes >=300mm, use guide rails to prevent rod bending. A plain cylinder drifts on air loss; for load holding use the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX270S
- ✓ 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 SI100BX270S FAQ
Yes, the SI100BX270S is discontinued. The direct replacement is the SAI100BX270S. It is dimensionally interchangeable per ISO 15552, keeping the same 100mm bore, 270mm stroke, G1/2 port, and mounting interface.
It has a G1/2 port. Force ratings are: 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 SAI100BX270S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX270S replacement — usually within 7-8 hours.