This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX270, 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 SI100BX270
The AirTAC Airtac SI100 Standard Cylinder SI100BX270 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 270mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX270, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX270
- 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 SI100BX270
The AirTAC SI100BX270 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 270mm stroke. Featuring a SUS304 stainless piston rod, it delivers 3927 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100BX270, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI100BX270 features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Because this specific SI SKU lacks a magnet (-S), it cannot accept a position switch. Note that a plain cylinder drifts on air loss; for held loads, explore the SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100BX270 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX270 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX270 |
| Bore size | Ø100 mm |
| Stroke | 270 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 SAI100BX270 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 SAI100BX270 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 SI100BX270
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×270 | 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 SI100BX270 Is Used
Heavy-Duty Pressing
Drives robust pressing and stamping operations requiring substantial linear thrust, leveraging the 3927 N push force at 0.5 MPa.
Pallet Handling
Actuates heavy pallet lifts and transfers in automated distribution centers where the SUS304 rod resists environmental moisture.
Material Discharge
Pushes dense raw material bins or heavy workpieces downward, relying on the 36mm adjustable air cushions to decelerate the load smoothly.
Replacing the Airtac SI100 Standard Cylinder SI100BX270 with the SAI100BX270
To replace the discontinued SI100BX270, order the SAI100BX270. Confirm the ISO 15552 mounting interface, the 270mm stroke, the G1/2 port, and your specific mounting accessory (LB, FA, TC, etc.). Because this SKU has no -S suffix, it cannot support magnetic sensing; if switches are needed, select an SAI model with the S magnet option and CS1-B/DS1-B equivalent sensors. For loads needing holding power without live air, specify the SAIL air-released lock or BSAI clamp-lock variant, as standard cushions only decelerate. If sizing down, a 80mm bore yields 2513 N push at 0.5 MPa; if sizing up, a 125mm bore yields 6136 N. At 270mm stroke, verify guide alignment to prevent rod bending side-loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX270
- ✓ 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 SI100BX270 FAQ
Yes, the AirTAC SI100BX270 is discontinued. The direct replacement is the SAI100BX270. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 270mm stroke, G1/2 port, and mounting interface, so it drops directly into existing fixtures.
This 100mm bore cylinder features a G1/2 air port and a 25mm piston rod. The thrust 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 force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX270
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