This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X740S, 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 SI100X740S
The AirTAC Airtac SI100 Standard Cylinder SI100X740S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 740mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X740S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke740 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X740S
- 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 SI100X740S
The AirTAC SI100X740S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 740mm stroke. Delivering 3927N push force at 0.5MPa via a G1/2 port, it is replaced by the SAI100X740S. This direct upgrade retains the exact ISO 15552 mounting interface, bore, and stroke. The SAI features an upgraded piston seal with two Y-shaped elements for low start-up pressure and long life.
Because this is a long 740mm stroke, external guides are recommended to prevent rod bending under side loads. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). Note that a standard cylinder does not hold load without live air; the cushion only decelerates. For secure holding, consider the SAIL lock or BSAI clamp-lock variants the SI line lacked, or use an external pilot check valve. Viton H seals expand the temperature range to 150C.
Airtac SI100 Standard Cylinder SI100X740S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X740S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X740S |
| Bore size | Ø100 mm |
| Stroke | 740 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 SAI100X740S 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 SAI100X740S 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 SI100X740S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×740 | 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 SI100X740S Is Used
Heavy Material Transfer
Drives large pallets or heavy workpieces along assembly lines, utilizing the 3927N push force at 0.5MPa to move substantial loads reliably over the 740mm travel.
Large Press Ejection
Ejects finished parts from large stamping or molding machinery, where the 100mm bore and 740mm stroke provide the necessary reach and force to clear the tooling area.
Automated Storage Retrieval
Actuates lifting or pushing arms in automated warehousing systems, handling loads up to the safe working limit of 2356N with external guides supporting the long stroke.
Replacing the Airtac SI100 Standard Cylinder SI100X740S with the SAI100X740S
To replace the discontinued SI100X740S, order the SAI100X740S. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 100mm bore, 740mm stroke, G1/2 port (PT/G/NPT thread options), and the -S magnet. The SAI is a direct dimensionally. When sizing, consider neighboring bores: an 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore provides 6136N. The 100mm bore itself reaches 5497N at 0.7MPa. For the 740mm stroke, add external guides to manage side loads and prevent rod bending. A plain SAI does not hold load on air loss; the cushion only decelerates. For load holding, specify the SAIL (air-released lock) or BSAI (clamp-lock) variant, or install an external rod lock. Rod material options include carbon steel, SUS420J2 (A), or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X740S
- ✓ 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 SI100X740S FAQ
Yes, the SI100X740S is discontinued. The direct replacement is the AirTAC SAI100X740S. It features the same ISO 15552 mounting interface, 100mm bore, 740mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly while adding an upgraded piston seal.
The 100mm bore uses a G1/2 air port. It delivers a push force of 3927N and a pull force of 3681N at 0.5MPa. At 0.7MPa, the push force is 5497N, and at 0.9MPa it is 7068N. The theoretical maximum force is 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X740S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X740S replacement — usually within 7-8 hours.