This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X35S, 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 SI100X35S
The AirTAC Airtac SI100 Standard Cylinder SI100X35S 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 SAI100X35S, 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 → SAI100X35S
- 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 SI100X35S
The AirTAC SI100X35S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 35 mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100X35S, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock and valve variants (SAIL, SAIF, BSAI) absent in the SI line. Your -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X35S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X35S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X35S |
| 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 SAI100X35S 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 SAI100X35S 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 SI100X35S
| 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 SI100X35S Is Used
High-Force Clamping
Secures heavy steel plates in machining fixtures using the 3927 N push force at 0.5 MPa.
Short-Stroke Pressing
Performs brief stamping and seating tasks for industrial components over a 35 mm travel.
Heavy Diverting
Actuates robust routing gates on high-capacity package lines requiring substantial push energy.
Replacing the Airtac SI100 Standard Cylinder SI100X35S with the SAI100X35S
To replace the SI100X35S, order the SAI100X35S and verify your ISO 15552 mounting interface, 100 mm bore, 35 mm stroke, G1/2 port (PT/G/NPT), and mounting accessory. The -S magnet is retained, though the SAI uses current AirTAC switches instead of the legacy CS1-B/DS1-B. Sizing both ways: the 100 mm bore yields 3927 N push at 0.5 MPa, while the neighboring 80 mm bore provides 2513 N. A plain cylinder drifts on air loss since the cushion only decelerates; for load holding, specify the SAIL lock, BSAI clamp-lock, or an external pilot check valve. The 35 mm stroke is short, so side-load and rod-bending risks are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X35S
- ✓ 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 SI100X35S FAQ
Yes, the SI100X35S is discontinued. The direct replacement is the AirTAC SAI100X35S. It shares the identical ISO 15552 mounting interface, 100 mm bore, 35 mm stroke, force, G1/2 port and mounting accessories, fitting directly into existing fixtures.
The 100 mm bore uses a G1/2 port. At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X35S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X35S replacement — usually within 7-8 hours.