This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X60FB, 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.

The AirTAC Airtac SI100 Standard Cylinder SI100X60FB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 60mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X60FB, which matches its ISO interface, bore, stroke, force and mounting.
The AirTAC SI100X60FB is a discontinued double-acting ISO 15552 profile cylinder with an FB flange. It delivers 3927 N push force at 0.5 MPa through a 100 mm bore. The direct replacement is the SAI100X60FB, matching the stroke, port, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. It adds SAIL and BSAI lock variants the SI lacked. Note: lacking an S magnet, this SKU cannot take a sensor.
| Model | Airtac SI100 Standard Cylinder SI100X60FB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X60FB |
| Bore size | Ø100 mm |
| Stroke | 60 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 SAI100X60FB carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100X60FB produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×60 | 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).
Applies 3927 N of push force at 0.5 MPa to seat bearings and pins in heavy machining fixtures.
Drives 60 mm strokes to lift and position 200 kg vertical loads via FB flange mounts.
Clamps large steel workpieces securely against forming presses using 7068 N at 0.9 MPa.
To replace the SI100X60FB, order the SAI100X60FB. Confirm the ISO 15552 FB flange interface, 100 mm bore, 60 mm stroke, and G1/2 port. For sizing, a 100 mm bore yields 3927 N push at 0.5 MPa; dropping to an 80 mm bore gives 2513 N. This plain cylinder drifts without air; use a pilot check valve or SAIL lock to hold loads. No magnet means no CS1-B sensor. The SAI family also offers SAIF valve variants.
Replacement checklist
Yes, the SI100X60FB is discontinued. The direct replacement is the SAI100X60FB, offering the same ISO 15552 FB flange interface, 100 mm bore, 60 mm stroke, and G1/2 port.
The G1/2 port cylinder delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, and a max of 801 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X60FB replacement — usually within 7-8 hours.