This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X340STC, 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 SI100X340STC
The AirTAC Airtac SI100 Standard Cylinder SI100X340STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 340mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X340STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke340 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X340STC
- 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 SI100X340STC
The AirTAC SI100X340STC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 340mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100X340STC, matching the exact bore, stroke, force, port, and TC trunnion mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The -S magnet supports CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X340STC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X340STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X340STC |
| Bore size | Ø100 mm |
| Stroke | 340 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 SAI100X340STC 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 SAI100X340STC 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 SI100X340STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×340 | 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 SI100X340STC Is Used
Heavy-Duty Pressing
Applies up to 5497 N at 0.7 MPa for seating bearings or forming light components in automated machinery.
Pallet Diverting
Uses the 340mm stroke and TC trunnion mount to push heavy pallets smoothly across transfer lines.
Replacing the Airtac SI100 Standard Cylinder SI100X340STC with the SAI100X340STC
To replace the SI100X340STC, order the SAI100X340STC. Verify the ISO 15552 TC trunnion mount, 340mm stroke, G1/2 port, and the -S magnet for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). Sizing alternatives: an 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore yields 6136 N. Note that a plain cylinder drifts without live air; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 340mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X340STC
- ✓ 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 SI100X340STC FAQ
Yes, the SI100X340STC is discontinued. The direct replacement is the SAI100X340STC. It shares the identical ISO 15552 mounting interface, 100mm bore, 340mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
It features a G1/2 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; with a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X340STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X340STC replacement — usually within 7-8 hours.