This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX650, 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 SI100AX650
The AirTAC Airtac SI100 Standard Cylinder SI100AX650 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 SAI100AX650, 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 → SAI100AX650
- 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 SI100AX650
The AirTAC SI100AX650 is a discontinued double-acting ISO 15552 profile cylinder featuring a 100 mm bore and 650 mm stroke. It delivers a push force of 3927 N at 0.5 MPa and uses a G1/2 air port with an M20x1.5 rod thread. The direct replacement is the SAI100AX650, retaining the same interface, force, and porting. This specific SKU includes the SUS420J2 stainless steel piston rod for corrosion resistance, but because it lacks a magnet (-S), it cannot accept magnetic switches.
The SAI100AX650 upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. For applications needing load holding on air loss, the SAI family adds SAIL and BSAI lock variants the SI lacked. Note that at 650 mm, this long stroke requires external guides to prevent rod bending under side loads.
Airtac SI100 Standard Cylinder SI100AX650 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX650 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX650 |
| 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 SAI100AX650 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 SAI100AX650 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 SI100AX650
| 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 SI100AX650 Is Used
Large Press Actuation
Drives heavy forming presses using the 3927 N push force at 0.5 MPa, with the SUS420J2 stainless rod resisting moisture in humid fabrication shops.
Material Lift Lowering
Lowers 200 kg material lifts over the 650 mm travel, relying on external guides to prevent rod bending during descent.
Pallet Diversion
Pushes heavy pallets across conveyor lines, utilizing the G1/2 port for rapid volume flow to maintain 30-800 mm/s speeds.
Replacing the Airtac SI100 Standard Cylinder SI100AX650 with the SAI100AX650
To replace the discontinued SI100AX650, order the SAI100AX650. Verify your ISO 15552 mounting fixtures, the G1/2 port, and the 650 mm stroke. Because this SKU lacks a magnet, it cannot support legacy CS1-B/DS1-B sensors; if position feedback is needed, select an SAI model with the S magnet suffix. For loads requiring 5497 N, operate this 100 mm cylinder at 0.7 MPa. A plain cylinder does not hold load without live air; for drop prevention, use an external pilot check valve or the SAIL/BSAI lock variants. Finally, at 650 mm, employ external guides to manage rod-bending risks.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX650
- ✓ 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 SI100AX650 FAQ
Yes, the AirTAC SI100AX650 is discontinued. The direct replacement is the SAI100AX650. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 650 mm stroke, G1/2 port, and mounting interface, so it fits existing fixtures directly.
This double-acting cylinder features a G1/2 air port. It delivers a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa the push force is 5497 N, and 7068 N at 0.9 MPa. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX650
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX650 replacement — usually within 7-8 hours.