This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X385, 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 SI100X385
The AirTAC Airtac SI100 Standard Cylinder SI100X385 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 385mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X385, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke385 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X385
- 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 SI100X385
The AirTAC SI100X385 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 385 mm stroke. It delivers 3927 N push and 3681 pull at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100X385, a direct sharing the same interface, force, and M20x1.5 rod thread.
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 lock variants the SI lacked. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X385 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X385 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X385 |
| Bore size | Ø100 mm |
| Stroke | 385 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 SAI100X385 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 SAI100X385 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 SI100X385
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×385 | 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 SI100X385 Is Used
Heavy Goods Diversion
Actuates large lane deflectors on packaging lines, using the 385 mm stroke to shift heavy pallets or totes smoothly across conveyor belts.
Pallet Lift Gates
Raises and lowers heavy access gates or lifting platforms in automated warehouses, providing robust push force for vertical material handling.
Press Ejection
Ejects finished machined parts or heavy stampings from large press beds, relying on the 3927 N push force at 0.5 MPa for reliable extraction.
Replacing the Airtac SI100 Standard Cylinder SI100X385 with the SAI100X385
To replace the SI100X385, order the SAI100X385. Verify your ISO 15552 mounting accessories (LB, FA, TC, etc.), the G1/2 port thread (PT/G/NPT), and the 385 mm stroke. Because this SKU has no -S magnet, it cannot support position sensing; if you need switches, select a magnet-equipped SAI model and use current AirTAC switches. For sizing down, an 80 mm bore gives 2513 N push at 0.5 MPa; for higher force, a 125 mm bore yields 6136 N. A standard cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. Finally, at 385 mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X385
- ✓ 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 SI100X385 FAQ
Yes, the SI100X385 is discontinued. The direct replacement is the AirTAC SAI100X385. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 100 mm bore, 385 mm stroke, output force, G1/2 port, and mounting fixtures.
The 100 mm bore uses a G1/2 port. Force output 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 maximum of 801 kgf at 1.0 MPa. It operates at 30-800 mm/s with a 36 mm adjustable air cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X385
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X385 replacement — usually within 7-8 hours.