This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX70, 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 SI100BX70
The AirTAC Airtac SI100 Standard Cylinder SI100BX70 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 70mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX70, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX70
- 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 SI100BX70
The AirTAC SI100BX70 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 70mm stroke. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX70. This direct successor shares the exact interface, G1/2 port, and M20x1.5 rod thread, fitting existing fixtures seamlessly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This specific SKU uses a SUS304 stainless rod (-B) but lacks a magnet (-S), so it cannot take CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100BX70 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX70 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX70 |
| Bore size | Ø100 mm |
| Stroke | 70 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 SAI100BX70 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 SAI100BX70 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 SI100BX70
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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 SI100BX70 Is Used
Heavy Pressing
Applies the 3927 N @0.5 MPa thrust for seating bearings and stamping heavy components on automated lines.
Clamp Fixtures
Secures large workholding blocks in machining centers using the robust 100mm bore and SUS304 rod.
Replacing the Airtac SI100 Standard Cylinder SI100BX70 with the SAI100BX70
To replace this SI100BX70, order the SAI100BX70. Confirm the ISO 15552 mounting interface, 100mm bore, 70mm stroke, G1/2 port, and SUS304 rod. Because this SKU has no magnet, it cannot accept position switches; order an -S variant if sensing is needed. Sizing down, an 80mm bore yields 2513 N push at 0.5 MPa; sizing up, a 125mm bore provides 6136 N. The cushion only decelerates; for load-holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX70
- ✓ 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 SI100BX70 FAQ
Yes, the SI100BX70 is discontinued. The direct replacement is the SAI100BX70. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 70mm stroke, force, G1/2 port, and mounting interface.
This double-acting cylinder features a G1/2 port. It delivers 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 max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX70
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX70 replacement — usually within 7-8 hours.