This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X250SLB, 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 SI100X250SLB
The AirTAC Airtac SI100 Standard Cylinder SI100X250SLB 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 SAI100X250SLB, 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 → SAI100X250SLB
- 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 SI100X250SLB
The AirTAC SI100X250SLB is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 250mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100X250SLB, matching the interface, force, and LB foot mount.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL and BSAI lock variants absent in the SI line. The -S magnet works with CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X250SLB Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X250SLB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X250SLB |
| 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 SAI100X250SLB 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 SAI100X250SLB 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 SI100X250SLB
| 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 SI100X250SLB Is Used
Heavy Press Clamping
Ideal for applying high clamping force on thick metal plates in machining centers, utilizing the 3927 N push force at 0.5 MPa.
Bulk Material Diversion
Actuates heavy-duty diverter gates on high-capacity conveyor lines, relying on the 36mm adjustable air cushions to absorb impact.
Replacing the Airtac SI100 Standard Cylinder SI100X250SLB with the SAI100X250SLB
To replace the SI100X250SLB, order the SAI100X250SLB and confirm the ISO 15552 mounting dimensions, 100mm bore, 250mm stroke, G1/2 port, LB foot mount, and -S magnet. If you need more force than the 3927 N at 0.5 MPa (or 5497 N at 0.7 MPa), step up to a 125mm bore; if less is needed, an 80mm bore provides 2513 N. A plain cylinder drifts on air loss since the cushion only decelerates, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 250mm stroke, ensure guide alignment to prevent rod bending side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X250SLB
- ✓ 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 SI100X250SLB FAQ
Yes, the SI100X250SLB is discontinued. The direct replacement is the SAI100X250SLB. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 250mm stroke, G1/2 port, and LB foot mount.
It uses a G1/2 air port. The 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 SAI100X250SLB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X250SLB replacement — usually within 7-8 hours.