This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X387, 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 SI100X387
The AirTAC Airtac SI100 Standard Cylinder SI100X387 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 387mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X387, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke387 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X387
- 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 SI100X387
The AirTAC SI100X387 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 387mm stroke. It delivers 3927N push and 3681N pull at 0.5MPa, using a G1/2 port and M20x1.5 rod thread. The direct replacement is the SAI100X387, retaining identical mounting, force, and porting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet (-S) so it cannot take a CS1-B/DS1-B sensor. For load holding, use SAIL or BSAI lock variants, as cushions only decelerate.
Airtac SI100 Standard Cylinder SI100X387 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X387 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X387 |
| Bore size | Ø100 mm |
| Stroke | 387 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 SAI100X387 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 SAI100X387 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 SI100X387
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×387 | 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 SI100X387 Is Used
Pallet Diversion
Pushes heavy pallets sideways off a main conveyor line using 3927N of thrust at 0.5MPa.
Press Ejection
Ejects formed metal parts from a stamping press, requiring the 100mm bore's 801kgf peak force.
Replacing the Airtac SI100 Standard Cylinder SI100X387 with the SAI100X387
To replace the SI100X387, order the SAI100X387. Confirm the ISO 15552 interface, 100mm bore, 387mm stroke, G1/2 port (PT/G/NPT), and mounting accessory match your fixture. Because this SKU has no -S magnet, it cannot accept position sensors; order the -S version if sensing is needed. Downsize to an 80mm bore (2513N push @0.5MPa) for lighter loads, or upsize to 125mm (6136N) for heavier forces. For the 387mm stroke, use external guides to prevent rod bending and side-load wear. The SAI does not hold load without air; add a pilot check valve or use the SAIL/BSAI lock variants for safety.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X387
- ✓ 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 SI100X387 FAQ
Yes, the SI100X387 is discontinued. The direct replacement is the SAI100X387. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 387mm stroke, G1/2 port, and mounting hardware.
The G1/2 port feeds a 25mm rod. Forces are: 3927N push / 3681N pull @0.5MPa, 5497N push @0.7MPa, 7068N push @0.9MPa, and an 801kgf max @1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X387
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X387 replacement — usually within 7-8 hours.