This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX75, 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 SI100BX75
The AirTAC Airtac SI100 Standard Cylinder SI100BX75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 75mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX75
- 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 SI100BX75
The AirTAC SI100BX75 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 75 mm stroke. It delivers a push force of 3927 N at 0.5 MPa and features a SUS304 stainless steel piston rod (-B) for corrosion resistance, alongside a G1/2 air port and M20x1.5 rod thread. As this SKU lacks a magnet (-S), it cannot accept a position sensor.
The direct replacement is the SAI100BX75, matching the ISO 15552 mounting interface, bore, stroke, force and port. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note that a plain cylinder drifts on air loss; use an external rod lock or pilot check valve for load holding.
Airtac SI100 Standard Cylinder SI100BX75 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX75 |
| Bore size | Ø100 mm |
| Stroke | 75 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 SAI100BX75 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 SAI100BX75 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 SI100BX75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×75 | 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 SI100BX75 Is Used
Heavy Press Clamping
Ideal for securing heavy steel plates in machining fixtures, utilizing the 3927 N push force at 0.5 MPa with the corrosion-resistant SUS304 rod.
Stamping Press Feed
Provides robust 75 mm stroke actuation for positioning sheet metal blanks, with adjustable air cushions decelerating the 100 mm bore at stroke ends.
Replacing the Airtac SI100 Standard Cylinder SI100BX75 with the SAI100BX75
To replace the SI100BX75, order the SAI100BX75 to retain the exact ISO 15552 mounting interface, 75 mm stroke, G1/2 port and 3927 N thrust at 0.5 MPa. Because this specific SKU has no magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, specify an SAI with the -S magnet option. The -B code indicates a SUS304 stainless rod, essential for corrosive environments, while a Viton H seal can extend operating temperature to 150 C. If sizing down, a 80 mm bore yields 2513 N push; if sizing up, a 125 mm bore provides 6136 N. A standard cylinder does not hold load without live air—the cushion only decelerates—so for suspended loads consider the SAIL or BSAI lock variants, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX75
- ✓ 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 SI100BX75 FAQ
Yes, the SI100BX75 is discontinued. The direct replacement is the SAI100BX75. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 75 mm stroke, G1/2 port, M20x1.5 thread and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped elements for lower start-up pressure.
At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical maximum force is 801 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-800 mm/s, and temperature range is -20 to +70 C.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX75
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX75 replacement — usually within 7-8 hours.