This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X70SFA, 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 SI100X70SFA
The AirTAC Airtac SI100 Standard Cylinder SI100X70SFA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 70mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X70SFA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X70SFA
- 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 SI100X70SFA
The AirTAC SI100X70SFA is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore, 70 mm stroke, and an FA flange mounting interface. It features a G1/2 port, M20x1.5 rod thread, and generates 3927 N of push force at 0.5 MPa. The direct replacement is the current-production SAI100X70SFA, which shares the same interface, bore, stroke, output force, port size, and FA mounting so it drops directly into existing fixtures.
The SAI upgrade introduces a refined piston seal utilizing two Y-shaped one-way elements for extended lifespan and lower start-up pressure. This -S SKU includes a piston magnet for legacy CS1-B/DS1-B sensors, and seal options like Viton H raise operating temperatures up to 150 C.
Airtac SI100 Standard Cylinder SI100X70SFA Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X70SFA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X70SFA |
| Bore size | Ø100 mm |
| Stroke | 70 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 SAI100X70SFA 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 SAI100X70SFA 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 SI100X70SFA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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 SI100X70SFA Is Used
Heavy-Duty Pressing
Drives large stamping and forming presses requiring substantial thrust, utilizing the 3927 N push force at 0.5 MPa to seat heavy components reliably.
Pallet Diversion
Actuates heavy-duty pallet stops and diverters on high-throughput packaging lines, using the FA flange mount to secure the 100 mm bore body rigidly to the frame.
Replacing the Airtac SI100 Standard Cylinder SI100X70SFA with the SAI100X70SFA
To replace the discontinued SI100X70SFA, order the SAI100X70SFA. Verify your ISO 15552 interface dimensions, the 100 mm bore, 70 mm stroke, G1/2 port, FA flange mounting, and the -S magnet configuration for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). If you need to size both ways, a neighbouring 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore provides 6136 N. A plain cylinder drifts on air loss because the air cushion only decelerates near stroke end; for rigid load holding, specify an external pilot check valve, a rod lock, or the SAIL/BSAI lock variants. The SAIF variant integrates a 4M valve if you need localized control.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X70SFA
- ✓ 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 SI100X70SFA FAQ
Yes, the AirTAC SI100X70SFA is discontinued. The direct replacement is the SAI100X70SFA. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the exact same 100 mm bore, 70 mm stroke, force, G1/2 port, and FA flange mounting.
The 100 mm bore 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 SAI100X70SFA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X70SFA replacement — usually within 7-8 hours.