This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX165S, 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 SI100BX165S
The AirTAC Airtac SI100 Standard Cylinder SI100BX165S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 165mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX165S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX165S
- 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 SI100BX165S
The AirTAC SI100BX165S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 165mm stroke, and a SUS304 stainless piston rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX165S. This direct upgrade matches the G1/2 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade utilizes two Y-shaped one-way piston seals for lower start-up pressure and longer life. The original -S magnet supports CS1-B/DS1-B switches, while the SAI family adds SAIL and BSAI lock variants the SI lacked.
Airtac SI100 Standard Cylinder SI100BX165S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX165S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX165S |
| Bore size | Ø100 mm |
| Stroke | 165 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 SAI100BX165S 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 SAI100BX165S 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 SI100BX165S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×165 | 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 SI100BX165S Is Used
Heavy-Duty Pressing
Applies 3927 N at 0.5 MPa for assembling dense mechanical components, utilizing the SUS304 rod in corrosive environments.
Fixture Clamping
Secures large workpieces using the ISO 15552 mounting interface, ensuring rigid holding during machining operations.
Replacing the Airtac SI100 Standard Cylinder SI100BX165S with the SAI100BX165S
To replace this SI100BX165S with the SAI100BX165S, verify the ISO 15552 mounting interface, 165mm stroke, G1/2 port (PT/G/NPT), and mounting accessory. The -B rod is SUS304 stainless steel and the -S magnet works with legacy CS1-B/DS1-B sensors. Sizing both ways: a neighboring 80mm bore yields 2513 N push at 0.5 MPa, while this 100mm bore reaches 5497 N at 0.7 MPa. For load holding, note a plain cylinder drifts on air loss as the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX165S
- ✓ 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 SI100BX165S FAQ
Yes, the SI100BX165S is discontinued. The direct replacement is the SAI100BX165S. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 100mm bore, 165mm stroke, force, G1/2 port, and mounting.
It features a G1/2 port and M20x1.5 rod thread. Theoretical forces 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 maximum of 801 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX165S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX165S replacement — usually within 7-8 hours.