This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X850H, 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 SI100X850H
The AirTAC SI100 Standard Cylinder SI100X850H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 850mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X850H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke850 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X850H
- 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 SI100X850H
The AirTAC SI100X850H is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions. It delivers a thrust of 3927 N at 0.5 MPa. The direct replacement is the SAI100X850H, which maintains the exact same 100mm bore, 850mm stroke, G1/2 port, and ISO 15552 mounting interface for existing fixtures. This specific SKU utilizes a Viton H seal for high-temperature environments up to 150 C.
Because this configuration lacks the -S magnet, it cannot accept position sensors. The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The SAI family also adds lock and valve variants the SI lacked.
Airtac SI100 Standard Cylinder SI100X850H Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X850H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X850H |
| Bore size | Ø100 mm |
| Stroke | 850 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 SAI100X850H 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 SAI100X850H 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 SI100X850H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×850 | 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 SI100X850H Is Used
High-Temperature Forming Press
Ideal for actuating heavy molds in hot environments up to 150 C, utilizing the Viton H seal to maintain integrity where standard NBR would fail.
Long-Stroke Pallet Transfer
The 850mm stroke and 3927 N thrust at 0.5 MPa push heavy pallets across transfer lines, requiring external guides to handle the extended rod length.
Replacing the Airtac SI100 Standard Cylinder SI100X850H with the SAI100X850H
To replace the SI100X850H, order the SAI100X850H and verify the ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread match your fixture. Confirm the Viton H high-temperature seal requirement. Since this is a no-S SKU, it cannot support magnetic sensing; if position detection is needed, switch to an SAI model with the magnet. At 850mm, this long stroke risks rod bending under side loads—always use external guides to prevent jamming. If sizing down, a 80mm bore yields 2513 N push at 0.5 MPa; if sizing up, a 125mm bore yields 6136 N. A plain cylinder drifts on air loss; for load holding, use the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X850H
- ✓ 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 SI100X850H FAQ
Yes, the SI100X850H is discontinued. The direct replacement is the SAI100X850H. It is dimensionally interchangeable per ISO 15552, keeping the same 100mm bore, 850mm stroke, G1/2 port, and mounting accessories.
The G1/2 port supplies a 25mm rod. Forces are: 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. Speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X850H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X850H replacement — usually within 7-8 hours.