This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X375TC, 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 SI100X375TC
The AirTAC Airtac SI100 Standard Cylinder SI100X375TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 375mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X375TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X375TC
- 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 SI100X375TC
The AirTAC SI100X375TC is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 375mm stroke, delivering 3927N push force at 0.5MPa. It features a G1/2 port, M20x1.5 rod thread, and 36mm adjustable air cushions. AirTAC replaced this legacy unit with the SAI100X375TC, a direct replacement matching the TC trunnion mount, bore, and force class.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. For applications needing load holding, the SAI family adds SAIL and BSAI lock variants the SI lacked. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X375TC Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X375TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X375TC |
| Bore size | Ø100 mm |
| Stroke | 375 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 SAI100X375TC 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 SAI100X375TC 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 SI100X375TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×375 | 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 SI100X375TC Is Used
Heavy Press Clamping
Ideal for applying high clamping force on heavy fabrication fixtures, utilizing the 3927N push force at 0.5MPa to secure large steel components during machining.
Pallet Diverting
Drives robust diverting arms on high-capacity conveyor lines, where the 375mm stroke provides the reach needed to redirect heavy pallets onto spur lanes.
Material Lift Gates
Actuates large loading dock gates or heavy material lifts, with the TC trunnion mount accommodating the pivotal movements required during extension.
Replacing the Airtac SI100 Standard Cylinder SI100X375TC with the SAI100X375TC
To replace the SI100X375TC, order the SAI100X375TC and verify the ISO 15552 TC trunnion mounting dimensions, G1/2 port, and 375mm stroke. Sizing context: a neighboring 80mm bore yields 2513N push at 0.5MPa, while the 125mm bore yields 6136N. This 100mm bore generates 3927N push and 3681N pull at 0.5MPa, with a max theoretical output of 801kgf at 1.0MPa. Because the 375mm stroke is long, use an external guide to prevent rod-bending and side-load damage. A plain cylinder does not hold load without live air; the cushion only decelerates. For secure holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. This no-magnet SKU cannot take a sensor.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X375TC
- ✓ 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 SI100X375TC FAQ
Yes, the SI100X375TC is discontinued. The direct replacement is the SAI100X375TC. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 375mm stroke, G1/2 port, TC trunnion mount, and output force.
This double-acting cylinder uses a G1/2 air port. It delivers 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a maximum theoretical force of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X375TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X375TC replacement — usually within 7-8 hours.