This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X250TC, 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 SI100X250TC
The AirTAC SI100 Standard Cylinder SI100X250TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X250TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X250TC
- 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 SI100X250TC
The AirTAC SI100X250TC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 250mm stroke. It delivers a push force of 3927 N at 0.5 MPa via a G1/2 port. As an end-of-line unit, it is replaced by the SAI100X250TC. This direct successor shares the exact ISO 15552 mounting interface, TC trunnion mount, output force, and stroke, fitting existing fixtures perfectly.
The SAI upgrade features a refined piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. For load holding, note that a standard cylinder drifts without live air; the cushion only decelerates. Use an external pilot check valve or the SAIL/BSAI lock variants.
Airtac SI100 Standard Cylinder SI100X250TC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X250TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X250TC |
| Bore size | Ø100 mm |
| Stroke | 250 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 SAI100X250TC 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 SAI100X250TC 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 SI100X250TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SI100X250TC Is Used
Heavy-Duty Pressing
Drives robust clamping and pressing actions in automated machining centers, utilizing the 5497 N push force at 0.7 MPa to secure heavy metal workpieces firmly.
Pallet Diverting
Actuates large diverters and stops on high-capacity material handling lines, where the TC trunnion mount absorbs mid-stroke moments during heavy pallet redirection.
Replacing the Airtac SI100 Standard Cylinder SI100X250TC with the SAI100X250TC
To replace the SI100X250TC, order the SAI100X250TC. Confirm the ISO 15552 TC trunnion interface, 100mm bore, 250mm stroke, and G1/2 port (PT/G/NPT thread options). This SKU lacks the -S magnet, so it cannot accept CS1-B/DS1-B sensors; choose an SAI-S equivalent if position detection is needed. For sizing, the 100mm bore yields 3927 N push at 0.5 MPa; a neighbouring 80mm bore provides 2513 N, while a 125mm bore offers 6136 N. Because this is a plain double-acting cylinder, it will not hold a load on air loss—use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for secure holding. The 250mm stroke is within standard limits, but always guide the rod to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X250TC
- ✓ 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 SI100X250TC FAQ
Yes, the SI100X250TC is discontinued. The direct replacement is the SAI100X250TC. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 250mm stroke, G1/2 port, TC mount, and output force.
This double-acting cylinder uses a G1/2 air port. It generates a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa push is 5497 N, at 0.9 MPa it is 7068 N, and the theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X250TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X250TC replacement — usually within 7-8 hours.