This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X635, 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 SI100X635
The AirTAC Airtac SI100 Standard Cylinder SI100X635 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 635mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X635, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke635 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X635
- 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 SI100X635
The AirTAC SI100X635 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 635mm stroke. It delivers a push force of 3927 N at 0.5 MPa via its G1/2 port. AirTAC replaced this legacy unit with the SAI100X635, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI upgrade features a redesigned piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet and cannot accept position sensors.
Airtac SI100 Standard Cylinder SI100X635 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X635 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X635 |
| Bore size | Ø100 mm |
| Stroke | 635 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 SAI100X635 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 SAI100X635 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 SI100X635
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×635 | 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 SI100X635 Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, utilizing the 3927 N push force to shift fully loaded pallets smoothly at 0.5 MPa operating pressure.
Vertical Lift Gate
Raises and lowers 200 kg material handling gates using the 635mm stroke, requiring external guide rails to prevent rod bending during transit.
Press Ejection
Ejects formed metal components from hydraulic presses, relying on the 36mm adjustable air cushions at both ends to decelerate the 25mm rod safely.
Replacing the Airtac SI100 Standard Cylinder SI100X635 with the SAI100X635
To replace the SI100X635, order the SAI100X635 and verify your ISO 15552 mounting accessories (LB, FA, CA, TC), 635mm stroke, and G1/2 port (PT/G/NPT). If downsizing, the 80mm bore yields 2513 N push at 0.5 MPa; if upsizing, the 125mm bore yields 6136 N. Because this is a 635mm stroke, use external guides to prevent rod bending and side-load damage. This non-magnet SKU cannot hold a position switch. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X635
- ✓ 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 SI100X635 FAQ
Yes, the SI100X635 is discontinued. The direct replacement is the SAI100X635. It shares the identical ISO 15552 mounting interface, 100mm bore, 635mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly without modifications.
This double-acting cylinder features a G1/2 air port and an M20x1.5 rod thread. 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 maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X635
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X635 replacement — usually within 7-8 hours.