This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX175S, 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 SI100BX175S
The AirTAC Airtac SI100 Standard Cylinder SI100BX175S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 175mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX175S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX175S
- 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 SI100BX175S
The AirTAC SI100BX175S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 175 mm stroke. It features a SUS304 stainless piston rod (B option) and a built-in magnet (S) for CS1-B/DS1-B legacy switches. Generating 3927 N push force at 0.5 MPa via its G1/2 port, the direct replacement is the SAI100BX175S.
The SAI upgrade retains identical ISO 15552 mounting dimensions, bore, stroke, and output force, but introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also expands functionality with SAIL, SAIF, and BSAI lock or valve variants the original SI lacked.
Airtac SI100 Standard Cylinder SI100BX175S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX175S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX175S |
| Bore size | Ø100 mm |
| Stroke | 175 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 SAI100BX175S 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 SAI100BX175S 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 SI100BX175S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×175 | 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 SI100BX175S Is Used
Heavy-Duty Pressing
Delivers 5497 N of push force at 0.7 MPa for securely seating bearings and assembling heavy mechanical components.
Product Diversion
Actuates heavy routing gates and pushers on high-throughput packaging lines, utilizing the 175 mm stroke.
Replacing the Airtac SI100 Standard Cylinder SI100BX175S with the SAI100BX175S
To replace the discontinued SI100BX175S, order the SAI100BX175S. Confirm the ISO 15552 mounting interface, the 175 mm stroke, the G1/2 port, and the SUS304 stainless rod (B) with magnet (S). The SAI accepts current AirTAC switches instead of the legacy CS1-B/DS1-B sensors. When sizing, neighbouring bores offer different force classes: an 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore yields 6136 N. Note that a plain cylinder does not hold load on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Because the stroke is under 300 mm, severe side-load rod bending is minimal, but standard guide alignment is still advised.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX175S
- ✓ 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 SI100BX175S FAQ
Yes, the SI100BX175S is discontinued. The direct replacement is the SAI100BX175S. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 175 mm stroke, output force, G1/2 port, and mounting accessories.
This double-acting cylinder uses a G1/2 port. It generates 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 force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX175S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX175S replacement — usually within 7-8 hours.