This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX75S, 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 SI100BX75S
The AirTAC Airtac SI100 Standard Cylinder SI100BX75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 75mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX75S
- 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 SI100BX75S
The AirTAC SI100BX75S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 75mm stroke, and a SUS304 stainless steel piston rod. It delivers 3927 N push and 3681 N pull force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100BX75S, which shares identical ISO 15552 mounting interface dimensions, stroke, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI family also adds SAIL, SAIF, and BSAI lock variants.
Airtac SI100 Standard Cylinder SI100BX75S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX75S |
| Bore size | Ø100 mm |
| Stroke | 75 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 SAI100BX75S 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 SAI100BX75S 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 SI100BX75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×75 | 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 SI100BX75S Is Used
Heavy-Duty Pressing
Drives robust pressing and stamping operations requiring up to 3927 N of thrust at 0.5 MPa.
Pallet Handling
Actuates heavy pallet stops and lift gates in distribution centers with a 200 kg vertical lift margin.
Corrosive Environments
Ideal for food or chemical washdown zones utilizing the SUS304 stainless piston rod for corrosion resistance.
Replacing the Airtac SI100 Standard Cylinder SI100BX75S with the SAI100BX75S
To replace the SI100BX75S, order the SAI100BX75S and confirm the ISO 15552 mounting interface, G1/2 port, and 75mm stroke. Retain your existing mounting accessories and -S magnet setup, noting the SAI uses current AirTAC switches instead of the legacy CS1-B/DS1-B. If sizing down, a 80mm bore yields 2513 N push at 0.5 MPa; if sizing up, a 125mm bore yields 6136 N. Remember that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding. The SUS304 rod offers high corrosion resistance compared to standard carbon steel.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX75S
- ✓ 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 SI100BX75S FAQ
Yes, the SI100BX75S is discontinued. The direct replacement is the SAI100BX75S. It is dimensionally interchangeable per ISO 15552, maintaining the same 100mm bore, 75mm stroke, force, G1/2 port, and mounting interface.
It features a G1/2 port. The 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 maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX75S replacement — usually within 7-8 hours.