This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX5S, 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 SI100BX5S
The AirTAC Airtac SI100 Standard Cylinder SI100BX5S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 5mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX5S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke5 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX5S
- 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 SI100BX5S
The AirTAC SI100BX5S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 5 mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. This version features a SUS304 stainless piston rod (-B) and a piston magnet (-S) for legacy CS1-B/DS1-B sensors. The direct replacement is the SAI100BX5S, which shares identical ISO 15552 mounting, force, and porting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that a plain cylinder drifts without live air; use an external rod lock or SAIL variant to hold loads.
Airtac SI100 Standard Cylinder SI100BX5S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX5S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX5S |
| Bore size | Ø100 mm |
| Stroke | 5 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 SAI100BX5S 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 SAI100BX5S 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 SI100BX5S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×5 | 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 SI100BX5S Is Used
Short-Stroke Clamping
Ideal for high-force 3927 N clamping tasks in machining fixtures where a 5 mm travel secures heavy components.
Press Fit Operations
Provides reliable 5 mm pressing force for inserting small bearings or pins into assemblies without overtravel.
Stainless Rod Ejector
The SUS304 rod suits corrosive environments, ejecting parts with a compact 5 mm motion in washdown zones.
Replacing the Airtac SI100 Standard Cylinder SI100BX5S with the SAI100BX5S
To replace the SI100BX5S, order the SAI100BX5S. Confirm the ISO 15552 interface, 100 mm bore, 5 mm stroke, G1/2 port, and the -B SUS304 rod. The -S magnet supports CS1-B/DS1-B sensors, though the SAI uses current AirTAC switches. Sizing both ways: the 80 mm bore yields 2513 N push at 0.5 MPa, while the 125 mm yields 6136 N. Because the cushion only decelerates, add a pilot check valve or BSAI clamp-lock for load holding. The 5 mm stroke is extremely short, so verify internal cushion engagement.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX5S
- ✓ 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 SI100BX5S FAQ
Yes, the SI100BX5S is discontinued. The direct replacement is the SAI100BX5S. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 5 mm stroke, G1/2 port, and mounting fixtures.
It features a G1/2 port. At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push is 5497 N, and 7068 N at 0.9 MPa. The theoretical max force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX5S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX5S replacement — usually within 7-8 hours.