This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX475S, 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 SI100BX475S
The AirTAC Airtac SI100 Standard Cylinder SI100BX475S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 475mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX475S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX475S
- 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 SI100BX475S
The AirTAC SI100BX475S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 475mm stroke. It delivers a push force of 3927 N at 0.5 MPa and features a SUS304 stainless piston rod (-B) alongside a built-in magnet (-S) for CS1-B/DS1-B legacy sensors. The direct replacement is the SAI100BX475S, sharing the same G1/2 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note that plain cylinders drift without live air; for load holding, explore the SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100BX475S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX475S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX475S |
| Bore size | Ø100 mm |
| Stroke | 475 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 SAI100BX475S 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 SAI100BX475S 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 SI100BX475S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×475 | 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 SI100BX475S Is Used
Heavy Material Transfer
Drives robust pallet stops and heavy workpiece diverters on automated conveyor lines requiring a 475mm reach and 3927 N push force.
Vertical Lift Stations
Hoists 200 kg payloads through a 475mm vertical stroke in packaging hubs, benefiting from the SUS304 rod for corrosion resistance.
Large Press Feeders
Advances heavy blanks into forming presses, utilizing the 36mm adjustable air cushions to decelerate high-speed 100mm bore movements.
Replacing the Airtac SI100 Standard Cylinder SI100BX475S with the SAI100BX475S
To replace the discontinued SI100BX475S, order the SAI100BX475S. Confirm the ISO 15552 mounting interface, 100mm bore, 475mm stroke, G1/2 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet and -B SUS304 rod are retained. At 0.5 MPa it pushes 3927 N; neighbouring bores are 80mm (2513 N) and 125mm (6136 N). Because the 475mm stroke is long, use external guides to prevent rod bending and side-load damage. The air cushion only decelerates; it does not hold load. For secure holding without air, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX475S
- ✓ 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 SI100BX475S FAQ
Yes, the SI100BX475S is discontinued. The direct replacement is the SAI100BX475S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 475mm stroke, G1/2 port, and mounting interface. The SAI uses an upgraded piston seal and current AirTAC switches for the magnet.
The 100mm bore delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa. At 0.7 MPa it pushes 5497 N, and 7068 N at 0.9 MPa. The theoretical max is 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s, the port is G1/2, and the rod thread is M20x1.5.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX475S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX475S replacement — usually within 7-8 hours.