This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX35, 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 SI100BX35
The AirTAC Airtac SI100 Standard Cylinder SI100BX35 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 35mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX35, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX35
- 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 SI100BX35
The AirTAC SI100BX35 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 35mm stroke. It delivers a push force of 3927 N at 0.5 MPa and uses a G1/2 air port. AirTAC replaced this legacy unit with the SAI100BX35, a direct replacement sharing the exact same ISO 15552 mounting interface, output force, and port size.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This specific SKU lacks a magnet (-S), so it cannot accept position switches like the legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100BX35 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX35 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX35 |
| Bore size | Ø100 mm |
| Stroke | 35 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 SAI100BX35 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 SAI100BX35 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 SI100BX35
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×35 | 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 SI100BX35 Is Used
Heavy Press Clamping
Applies 3927 N of push force at 0.5 MPa to secure heavy sheet metal or composite parts during machining and fastening operations.
Short-Stroke Ejection
Uses the 35mm stroke to rapidly eject dense finished components from press beds or molding fixtures without overtravel.
Pallet Stopping
Acts as a high-force end-stop on conveyor lines to halt loaded pallets, safely absorbing kinetic energy using the adjustable cushion.
Replacing the Airtac SI100 Standard Cylinder SI100BX35 with the SAI100BX35
To replace the SI100BX35, order the SAI100BX35. Verify your ISO 15552 mounting accessory (LB foot, FA flange, TC trunnion), the G1/2 port thread (PT/G/NPT), and the M20x1.5 rod thread. Because this SKU lacks the -S magnet, it cannot support magnetic sensing; if switches are needed, select an SAI100BX35S instead. For force context, the 100mm bore yields 3927 N push at 0.5 MPa, while the neighbouring 80mm bore provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding. The SAI family also offers SAIL or BSAI lock variants if integrated holding is required.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX35
- ✓ 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 SI100BX35 FAQ
Yes, the SI100BX35 is discontinued. The direct replacement is the AirTAC SAI100BX35. It shares the identical ISO 15552 mounting interface, 100mm bore, 35mm stroke, G1/2 port, and output force, fitting directly into existing fixtures.
The bore features a G1/2 air port. Force 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 of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX35
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX35 replacement — usually within 7-8 hours.