This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX400, 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 SI100AX400
The AirTAC SI100 Standard Cylinder SI100AX400 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 400mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX400, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX400
- 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 SI100AX400
The AirTAC SI100AX400 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 400mm stroke. It delivers 3927 N push force at 0.5 MPa and features a SUS420J2 stainless steel rod (A option) for corrosion resistance, alongside a G1/2 port and M20x1.5 rod thread. AirTAC replaced this legacy unit with the SAI100AX400.
The SAI100AX400 is a direct replacement matching the exact ISO 15552 mounting interface, bore, stroke, output force, and port size. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. For load holding, note that a standard cylinder drifts without live air; use the SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100AX400 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX400 |
| Bore size | Ø100 mm |
| Stroke | 400 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 SAI100AX400 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 SAI100AX400 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 SI100AX400
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SI100AX400 Is Used
Heavy Press Clamping
Secures large metal workpieces in machining fixtures, using the 3927 N push force at 0.5 MPa to hold components firmly against cutting forces.
Replacing the Airtac SI100 Standard Cylinder SI100AX400 with the SAI100AX400
To replace the discontinued SI100AX400, order the SAI100AX400. Verify your ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G1/2 port, and the 400mm stroke. Because this SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor; if position detection is needed, select an SAI100X400S and use current AirTAC switches. Sizing both ways: the 100mm bore yields 5497 N push at 0.7 MPa, while a neighbouring 80mm bore provides 3518 N push at 0.7 MPa. For the 400mm stroke, use external guides to prevent rod bending and side-load damage. This plain cylinder does not hold load on air loss; add an external rod lock or pilot check valve, or specify the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX400
- ✓ 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 SI100AX400 FAQ
Yes, the SI100AX400 is discontinued. The direct replacement is the SAI100AX400. It matches the ISO 15552 mounting interface, 100mm bore, 400mm stroke, force, and G1/2 port, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder uses a G1/2 port. It generates 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 force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX400
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX400 replacement — usually within 7-8 hours.