This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX50, 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 SI100BX50
The AirTAC Airtac SI100 Standard Cylinder SI100BX50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX50
- 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 SI100BX50
The AirTAC SI100BX50 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 50mm stroke. It delivers 3927 N push and 3681 N pull at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100BX50, retaining identical mounting, force, and interface dimensions.
This SKU lacks a magnet (-S) and cannot accept a sensor. The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The SUS304 stainless rod (-B) resists corrosion, and Viton H seals raise heat to 150 C.
Airtac SI100 Standard Cylinder SI100BX50 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX50 |
| Bore size | Ø100 mm |
| Stroke | 50 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 SAI100BX50 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 SAI100BX50 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 SI100BX50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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 SI100BX50 Is Used
Heavy-Duty Pressing
Drives robust stamping and forming stations, delivering 5497 N at 0.7 MPa to seat heavy components reliably.
Replacing the Airtac SI100 Standard Cylinder SI100BX50 with the SAI100BX50
To replace the SI100BX50, order the SAI100BX50. Verify the ISO 15552 mounting interface, G1/2 port, M20x1.5 rod thread, and SUS304 (-B) rod. Since this SKU has no magnet, it cannot take legacy CS1-B/DS1-B switches; add -S if sensing is needed. Neighbouring bores: 80mm yields 2513 N push, 125mm yields 6136 N at 0.5 MPa. For load holding, note the cushion only decelerates; use an external rod lock, pilot check valve, or SAIL/BSAI lock variant. The SAIF variant integrates a 4M valve (bores 32-100).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX50
- ✓ 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 SI100BX50 FAQ
Yes, the SI100BX50 is discontinued. The direct replacement is the SAI100BX50. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 50mm stroke, G1/2 port, and mounting interface.
It uses a G1/2 port. Force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, with a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX50
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX50 replacement — usually within 7-8 hours.