This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X640S, 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 SI100X640S
The AirTAC Airtac SI100 Standard Cylinder SI100X640S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 640mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X640S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke640 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X640S
- 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 SI100X640S
The AirTAC SI100X640S is a discontinued double-acting ISO 15552 profile cylinder with a 640 mm stroke, delivering 3927 N push force at 0.5 MPa through its G1/2 port. It is directly replaced by the SAI100X640S.
The SAI direct maintains the exact ISO 15552 mounting interface, bore, and output force. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure, and introduces SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI100 Standard Cylinder SI100X640S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X640S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X640S |
| Bore size | Ø100 mm |
| Stroke | 640 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 SAI100X640S 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 SAI100X640S 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 SI100X640S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×640 | 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 SI100X640S Is Used
Heavy Material Transfer
Drives robust pallet stops and heavy workpiece diverters on high-throughput conveyor lines requiring a 640 mm reach and 3927 N push force.
Pallet Positioning Gates
Actuates large loading dock gates and heavy structural barriers in automated warehouses, utilising the full 640 mm stroke for wide clearance.
Large Press Feeding
Pushes substantial metal blanks or composite sheets into large-format hydraulic presses, benefiting from the stable ISO 15552 profile barrel.
Replacing the Airtac SI100 Standard Cylinder SI100X640S with the SAI100X640S
To replace the SI100X640S, order the SAI100X640S and verify your ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread. The -S suffix means it has a piston magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches. If sizing up or down, neighbouring bores are 80 mm and 125 mm, with the 100 mm bore pushing 5497 N at 0.7 MPa. For the 640 mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X640S
- ✓ 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 SI100X640S FAQ
Yes, the SI100X640S is discontinued. The direct replacement is the SAI100X640S. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 640 mm stroke, output force, G1/2 port, and mounting accessories.
This double-acting cylinder features a G1/2 air 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 maximum force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X640S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X640S replacement — usually within 7-8 hours.