This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX650S, 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 SI100AX650S
The AirTAC Airtac SI100 Standard Cylinder SI100AX650S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 650mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX650S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke650 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX650S
- 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 SI100AX650S
The AirTAC SI100AX650S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore and 650mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI100AX650S, which maintains the exact same interface, force, and mounting dimensions.
The SAI upgrade introduces an improved piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This specific SI100AX650S variant uses a SUS420J2 stainless steel rod and includes a magnet for CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100AX650S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX650S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX650S |
| Bore size | Ø100 mm |
| Stroke | 650 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 SAI100AX650S 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 SAI100AX650S 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 SI100AX650S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×650 | 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 SI100AX650S Is Used
Heavy Press Ejection
Provides the 3927 N push at 0.5 MPa needed to eject dense stamped parts from heavy press dies over the 650mm travel.
Pallet Diversion
Actuates large profile-barrel diverters to redirect loaded pallets on wide conveyor lines using the G1/2 air supply.
Replacing the Airtac SI100 Standard Cylinder SI100AX650S with the SAI100AX650S
To replace this SI100AX650S, order the SAI100AX650S. Verify your ISO 15552 mounting interface, the 650mm stroke, and the G1/2 port. Keep the SUS420J2 stainless rod and the -S magnet configuration, noting the SAI family uses current AirTAC switches instead of the legacy CS1-B/DS1-B. If you need to size down, the 80mm bore yields 2513 N push at 0.5 MPa; sizing up to 125mm provides 6136 N. Because this is a 650mm stroke, support the load with external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss, so for load holding consider the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX650S
- ✓ 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 SI100AX650S FAQ
Yes, the SI100AX650S is discontinued. The direct replacement is the SAI100AX650S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 650mm stroke, G1/2 port, and mounting fixtures.
It features a G1/2 port and delivers 3927 N push / 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a maximum theoretical force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX650S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX650S replacement — usually within 7-8 hours.