This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX150S, 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 SI100BX150S
The AirTAC Airtac SI100 Standard Cylinder SI100BX150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX150S
- 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 SI100BX150S
The AirTAC SI100BX150S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 150mm stroke, and SUS304 stainless steel rod. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, its direct replacement is the SAI100BX150S. The SAI upgrade retains the exact ISO 15552 mounting interface, bore, stroke, and output force, fitting existing fixtures seamlessly while adding an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure.
This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors. Note that a standard cylinder drifts on air loss; the air cushion only decelerates. For held loads, explore the SAIL or BSAI lock variants, or use an external pilot check valve.
Airtac SI100 Standard Cylinder SI100BX150S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX150S |
| Bore size | Ø100 mm |
| Stroke | 150 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 SAI100BX150S 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 SAI100BX150S 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 SI100BX150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×150 | 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 SI100BX150S Is Used
Heavy-Duty Pressing
Drives 3927 N at 0.5 MPa for seating bearings and stamping components in automated machinery.
Pallet Diverting
Handles robust 150mm stroke actuation to redirect heavy pallets on packaging lines.
Replacing the Airtac SI100 Standard Cylinder SI100BX150S with the SAI100BX150S
To replace the discontinued SI100BX150S, order the SAI100BX150S, confirming the ISO 15552 interface, 100mm bore, 150mm stroke, G1/2 port, and SUS304 rod. If down-sizing, an 80mm bore yields 2513 N push at 0.5 MPa; up-sizing to 125mm provides 6136 N. For strokes >= 300mm, use a guide to prevent rod bending. A plain cylinder does not hold load without live air; the cushion only decelerates. For load holding, use the SAIL lock, BSAI clamp-lock, or an external rod lock. The SAIF variant adds a built-in 4M valve (bores 32-100).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX150S
- ✓ 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 SI100BX150S FAQ
Yes, the SI100BX150S is discontinued. The direct replacement is the SAI100BX150S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 150mm stroke, force, G1/2 port, and SUS304 rod.
It features a G1/2 port. Force ratings are: 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX150S replacement — usually within 7-8 hours.