This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX400SH, 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 SI100BX400SH
The AirTAC SI100 Standard Cylinder SI100BX400SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 400mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX400SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX400SH
- 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 SI100BX400SH
The AirTAC SI100BX400SH is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 400mm stroke, SUS304 stainless rod, high-temp Viton H seals and a piston magnet. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX400SH. This direct successor shares the exact G1/2 port, M20x1.5 thread and ISO 15552 mounting dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The original CS1-B/DS1-B sensors fit the SI magnet, while the SAI family also adds SAIL and BSAI lock variants absent from the SI line.
Airtac SI100 Standard Cylinder SI100BX400SH Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX400SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX400SH |
| Bore size | Ø100 mm |
| Stroke | 400 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 SAI100BX400SH 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 SAI100BX400SH 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 SI100BX400SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SI100BX400SH Is Used
Heavy Stamping Press
Drives robust tooling in automated metal forming lines, utilizing the 3927 N thrust to actuate heavy dies over the 400 mm travel distance.
High-Temp Ejection
Ejects molded components from heated environments up to 150 C, relying on the SUS304 rod and Viton H seals for thermal endurance.
Replacing the Airtac SI100 Standard Cylinder SI100BX400SH with the SAI100BX400SH
To replace the SI100BX400SH, order the SAI100BX400SH direct, verifying the ISO 15552 interface, 100mm bore, 400mm stroke, G1/2 port and mounting accessory. The -S magnet accommodates CS1-B/DS1-B switches, while the -B rod is SUS304 and -H seal is Viton for 0-150 C. For load holding, note that a standard cylinder drifts on air loss; the cushion only decelerates. Use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 400mm stroke, prevent rod bending by using external guides to manage side loads. If downsizing, a 80mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125mm bore provides 6136 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX400SH
- ✓ 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 SI100BX400SH FAQ
Yes, the SI100BX400SH is discontinued. The direct replacement is the SAI100BX400SH. It is dimensionally interchangeable per ISO 15552, maintaining the same 100mm bore, 400mm stroke, G1/2 port, and mounting interface.
This double-acting cylinder features a G1/2 port. It delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa, 5497 N at 0.7 MPa, 7068 N at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX400SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX400SH replacement — usually within 7-8 hours.