This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX85, 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 SI100AX85
The AirTAC Airtac SI100 Standard Cylinder SI100AX85 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 85mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX85, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX85
- 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 SI100AX85
The AirTAC SI100AX85 is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 3927 N push and 3681 N pull at 0.5 MPa. It features a SUS420J2 stainless piston rod, M20x1.5 thread, G1/2 port, and 36 mm cushions. As this SKU lacks a magnet, it cannot accept a sensor.
The direct replacement is the SAI100AX85, sharing the same ISO 15552 mounting interface, bore, stroke, force, and port. The SAI upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure.
Airtac SI100 Standard Cylinder SI100AX85 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX85 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX85 |
| Bore size | Ø100 mm |
| Stroke | 85 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 SAI100AX85 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 SAI100AX85 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 SI100AX85
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×85 | 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 SI100AX85 Is Used
Heavy-Duty Pressing
Drives large stamping and pressing dies requiring 3927 N of push force at 0.5 MPa, utilizing the SUS420J2 stainless rod in washdown manufacturing areas.
Pallet Diversion
Actuates heavy lane guides and diverters on high-capacity conveyor lines, safely handling a 2356 N working load with adjustable 36 mm cushions.
Replacing the Airtac SI100 Standard Cylinder SI100AX85 with the SAI100AX85
To replace the SI100AX85, order the SAI100AX85. Verify the ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread. This non-magnet SKU cannot take a switch; if sensing is needed, order an SAI with the S suffix for CS1-B/DS1-B compatibility. The SUS420J2 rod suits corrosive settings. Sizing both ways: dropping to an 80 mm bore gives 2513 N push, while stepping up to 125 mm yields 6136 N. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The 85 mm stroke is under 300 mm, so rod bending risks are low.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX85
- ✓ 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 SI100AX85 FAQ
Yes, the SI100AX85 is discontinued. The direct replacement is the SAI100AX85. It matches the ISO 15552 mounting interface, 100 mm bore, 85 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
It has a G1/2 port. Force ratings 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 is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX85
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX85 replacement — usually within 7-8 hours.