This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X325, 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 SI100X325
The AirTAC Airtac SI100 Standard Cylinder SI100X325 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 325mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X325, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X325
- 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 SI100X325
The AirTAC SI100X325 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 325mm stroke. Delivering 3927 N push force at 0.5 MPa, it features a G1/2 port and M20x1.5 rod thread. The direct replacement is the SAI100X325, matching the exact bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note this SKU lacks the -S magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X325 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X325 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X325 |
| Bore size | Ø100 mm |
| Stroke | 325 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 SAI100X325 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 SAI100X325 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 SI100X325
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×325 | 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 SI100X325 Is Used
Heavy Press Clamping
Secures large automotive castings during machining, using the 3927 N thrust at 0.5 MPa to hold parts rigidly against cutting forces.
Pallet Lift Gates
Raises and lowers loaded pallet gates; the 325mm stroke accommodates elevation changes while the 200 kg vertical lift capacity handles substantial loads.
Bulk Material Diversion
Actuates heavy diverter arms on packaging lines, relying on the G1/2 port volume and adjustable 36mm cushions to decelerate the 100mm bore smoothly.
Replacing the Airtac SI100 Standard Cylinder SI100X325 with the SAI100X325
To replace the SI100X325, order the SAI100X325 and confirm the ISO 15552 interface, 325mm stroke, G1/2 port (PT/G/NPT) and mounting accessory. Because this is a non-magnet SKU, position sensing is impossible without external switches. For sizing both ways: dropping to an 80mm bore yields 2513 N push @0.5 MPa, while a 125mm bore offers 6136 N. At 325mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding use the SAIL lock, BSAI clamp-lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X325
- ✓ 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 SI100X325 FAQ
Yes, the SI100X325 is discontinued. The direct replacement is the AirTAC SAI100X325. It is dimensionally interchangeable per ISO 15552, keeping the same 100mm bore, 325mm stroke, output force, G1/2 port and mounting fixtures.
The bore is 100mm with a G1/2 air port. The thrust is 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 max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X325
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X325 replacement — usually within 7-8 hours.