This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX275, 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 SI100AX275
The AirTAC Airtac SI100 Standard Cylinder SI100AX275 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 275mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX275, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX275
- 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 SI100AX275
The AirTAC SI100AX275 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 275mm stroke. It delivers a push force of 3927 N at 0.5 MPa and uses a G1/2 port. The direct replacement is the SAI100AX275, which shares the same interface, force, and mounting fixtures.
This SKU features a SUS420J2 stainless piston rod and lacks a magnet, meaning it cannot accept a sensor. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure.
Airtac SI100 Standard Cylinder SI100AX275 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX275 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX275 |
| Bore size | Ø100 mm |
| Stroke | 275 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 SAI100AX275 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 SAI100AX275 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 SI100AX275
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×275 | 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 SI100AX275 Is Used
Heavy-Duty Pressing
Applies up to 5497 N at 0.7 MPa for seating bearings and forming components in automated machinery.
Pallet Diversion
Drives robust routing gates or stoppers on high-mass material handling conveyor lines.
Replacing the Airtac SI100 Standard Cylinder SI100AX275 with the SAI100AX275
To replace the SI100AX275, order the SAI100AX275. Confirm the ISO 15552 mounting interface, 275mm stroke, G1/2 port, and SUS420J2 rod. This non-magnet SKU cannot take a switch; if sensing is needed, select an SAI model with the S suffix for current AirTAC switches. For sizing alternatives, a neighbouring 80mm bore yields 2513 N push at 0.5 MPa, while a 125mm bore offers 6136 N. Since this plain cylinder lacks a lock, it will drift on air loss; use an external pilot check valve or the SAIL/BSAI lock variant for held loads. At 275mm stroke, ensure guide rails carry side loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX275
- ✓ 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 SI100AX275 FAQ
Yes, the SI100AX275 is discontinued. The direct replacement is the SAI100AX275. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 275mm stroke, force, G1/2 port, and mounting accessories.
It features a G1/2 port and M20x1.5 rod thread. Force output is 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, with a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX275
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX275 replacement — usually within 7-8 hours.