This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX850, 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 SI100AX850
The AirTAC Airtac SI100 Standard Cylinder SI100AX850 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 SAI100AX850, 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 → SAI100AX850
- 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 SI100AX850
The AirTAC SI100AX850 is a discontinued double-acting ISO 15552 profile cylinder with an 850 mm stroke and a SUS420J2 stainless piston rod. Generating 3927 N push force at 0.5 MPa, it is replaced by the SAI100AX850. This direct upgrade keeps the same G1/2 port, M20x1.5 thread, and ISO 15552 mounting dimensions, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet for switches. The air cushion only decelerates; use SAIL or BSAI lock variants for load holding.
Airtac SI100 Standard Cylinder SI100AX850 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX850 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX850 |
| 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 SAI100AX850 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 SAI100AX850 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 SI100AX850
| 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 SI100AX850 Is Used
Long-Stroke Diversion
Pushes heavy pallets across 850 mm transfer lines where the 3927 N thrust at 0.5 MPa easily overcomes friction.
Large Press Ejection
Ejects formed parts from machinery, relying on the 36 mm adjustable air cushions to decelerate the rod at stroke end.
Replacing the Airtac SI100 Standard Cylinder SI100AX850 with the SAI100AX850
To replace the SI100AX850, order the SAI100AX850. Verify the ISO 15552 interface, 100 mm bore, 850 mm stroke, G1/2 port, and SUS420J2 rod. Because this 850 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load wear. Neighbouring bores: an 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore yields 6136 N. This plain cylinder cannot hold load without air; add an external rod lock or pilot check valve, or specify the SAIL/BSAI lock variant. As a non-magnet SKU, it cannot take CS1-B/DS1-B switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX850
- ✓ 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 SI100AX850 FAQ
Yes, the SI100AX850 is discontinued. The direct replacement is the SAI100AX850. It features the same ISO 15552 mounting interface, 100 mm bore, 850 mm stroke, force, and G1/2 port, fitting directly into existing fixtures.
This double-acting cylinder has a G1/2 port. It 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX850
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX850 replacement — usually within 7-8 hours.