This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X400H, 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 SI100X400H
The AirTAC Airtac SI100 Standard Cylinder SI100X400H 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 SAI100X400H, 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 → SAI100X400H
- 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 SI100X400H
The AirTAC SI100X400H is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 400mm stroke. Built for high temperatures, it features a Viton H seal (0-150 C) and generates 3927 N push force at 0.5 MPa. The direct replacement is the SAI100X400H, matching the G1/2 port, M20x1.5 thread, and 36mm cushions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Because this specific SKU lacks a magnet (-S), it cannot accept position sensors.
Airtac SI100 Standard Cylinder SI100X400H Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X400H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X400H |
| 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 SAI100X400H 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 SAI100X400H 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 SI100X400H
| 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 SI100X400H Is Used
High-Temperature Press Ejection
Handles 3927 N push force to eject heavy parts from heated molding presses, leveraging the 0-150 C Viton H seal to withstand ambient radiant heat without degrading.
Heavy Pallet Diversion
Provides robust 400mm stroke to push loaded pallets across transfer lines, requiring external guide rails to absorb side-load impacts during the long extension.
Industrial Door Actuation
Delivers 5497 N at 0.7 MPa to open and close large industrial forge doors, safely decelerating the heavy 200 kg load at stroke ends using 36mm adjustable cushions.
Replacing the Airtac SI100 Standard Cylinder SI100X400H with the SAI100X400H
To replace the SI100X400H, order the SAI100X400H. Verify the ISO 15552 mounting interface, 400mm stroke, G1/2 port, and high-temp Viton H seal. Sizing options include dropping to an 80mm bore (2513 N push @0.5 MPa) or stepping up to 125mm (6136 N). Note this SKU has no magnet, so magnetic switches (CS1-B/DS1-B) will not function. For the 400mm stroke, use external guides to prevent rod bending and side-load wear. The air cushion only decelerates; it does not hold load. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X400H
- ✓ 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 SI100X400H FAQ
Yes, the SI100X400H is discontinued. The direct replacement is the SAI100X400H. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 400mm stroke, G1/2 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped elements for lower start-up pressure.
The 100mm bore delivers 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. It uses a G1/2 port and a 25mm piston rod with an M20x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X400H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X400H replacement — usually within 7-8 hours.