This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX45S, 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 SI100BX45S
The AirTAC Airtac SI100 Standard Cylinder SI100BX45S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 45mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX45S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX45S
- 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 SI100BX45S
The AirTAC SI100BX45S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 45mm stroke. It delivers a push force of 3927 N at 0.5 MPa through its G1/2 port. The direct replacement is the SAI100BX45S, which matches the original ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This legacy SI100BX45S includes the -S magnet for CS1-B/DS1-B switches and the -B SUS304 stainless steel rod for corrosion resistance.
Airtac SI100 Standard Cylinder SI100BX45S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX45S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX45S |
| Bore size | Ø100 mm |
| Stroke | 45 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 SAI100BX45S 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 SAI100BX45S 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 SI100BX45S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×45 | 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 SI100BX45S Is Used
Heavy Pressing
Applies the 3927 N push force at 0.5 MPa for seating heavy bearings or pressing components into housings on an automated line.
Pallet Diverter
Actuates a heavy-duty routing gate on a conveyor system, relying on the 45mm stroke for rapid, short-throw redirection of pallets.
Replacing the Airtac SI100 Standard Cylinder SI100BX45S with the SAI100BX45S
To replace the SI100BX45S, order the SAI100BX45S and verify your ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread. The -S magnet and -B SUS304 rod must be specified on the new order. Sizing both ways: the 100mm bore yields 3927 N push at 0.5 MPa, while the neighbouring 80mm bore offers 2513 N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The 45mm stroke is short, so rod-bending side loads are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX45S
- ✓ 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 SI100BX45S FAQ
Yes, the SI100BX45S is discontinued. The direct replacement is the SAI100BX45S. It is dimensionally interchangeable per ISO 15552, offering the same 100mm bore, 45mm stroke, 3927 N force, and G1/2 port.
This double-acting cylinder uses a G1/2 port. Force ratings are: push 3927 N and pull 3681 N at 0.5 MPa, push 5497 N at 0.7 MPa, push 7068 N at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX45S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX45S replacement — usually within 7-8 hours.