This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX280, 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 SI100BX280
The AirTAC Airtac SI100 Standard Cylinder SI100BX280 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 280mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX280, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX280
- 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 SI100BX280
The AirTAC SI100BX280 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 280 mm stroke. It delivers 3927 N push and 3681 N pull at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100BX280, matching the interface, force, and mounting.
This SKU features a SUS304 stainless piston rod (-B) but lacks a magnet, so it cannot accept a CS1-B/DS1-B sensor. The SAI upgrade uses two Y-shaped piston seals for low start-up pressure.
Airtac SI100 Standard Cylinder SI100BX280 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX280 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX280 |
| Bore size | Ø100 mm |
| Stroke | 280 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 SAI100BX280 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 SAI100BX280 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 SI100BX280
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×280 | 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 SI100BX280 Is Used
Heavy-Duty Pressing
Applies up to 7068 N of push force at 0.9 MPa for seating bearings and assembling large components.
Pallet Diversion
Drives robust routing arms or stop gates on high-mass material handling lines.
Vertical Lift Gates
Raises and lowers heavy safety guards or access doors, safely managing loads around 200 kg.
Replacing the Airtac SI100 Standard Cylinder SI100BX280 with the SAI100BX280
To replace the SI100BX280, order the SAI100BX280 to keep the identical ISO 15552 mounting interface, 100 mm bore, 280 mm stroke, and G1/2 port. Because this is a no-S SKU, it has no magnet and cannot support position sensing; if detection is needed, select an SAI model with the magnet option. The 280 mm stroke is under the 1500 mm standard limit, but you should still use guide rails to prevent rod bending under heavy lateral loads. For sizing, the 80 mm bore offers 2513 N push at 0.5 MPa, while the 125 mm bore provides 6136 N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX280
- ✓ 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 SI100BX280 FAQ
Yes, the SI100BX280 is discontinued. The direct replacement is the SAI100BX280. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 280 mm stroke, G1/2 port, and mounting fixtures.
It uses a G1/2 port. At 0.5 MPa it pushes 3927 N and pulls 3681 N. At 0.7 MPa push is 5497 N, and at 0.9 MPa push is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX280
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX280 replacement — usually within 7-8 hours.