This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X275, 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 SI100X275
The AirTAC SI100 Standard Cylinder SI100X275 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 SAI100X275, 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 → SAI100X275
- 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 SI100X275
The AirTAC SI100X275 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 through a G1/2 port. AirTAC replaced this legacy unit with the SAI100X275. The SAI is a direct upgrade: it matches the original ISO 15552 mounting interface, bore, stroke, output force, and port size exactly, fitting existing fixtures without modification.
The SAI family introduces an upgraded piston seal featuring two Y-shaped one-way elements for longer life and lower start-up pressure. Note that this specific SI100X275 SKU lacks a magnet (-S) and cannot accept position sensors.
Airtac SI100 Standard Cylinder SI100X275 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X275 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X275 |
| 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 SAI100X275 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 SAI100X275 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 SI100X275
| 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 SI100X275 Is Used
Heavy-Duty Pressing
Drives robust pressing and stamping operations, utilizing the 3927 N push force at 0.5 MPa to seat bearings and assemble heavy mechanical components.
Pallet Diversion
Actuates heavy pallet stops and diverter arms on packaging lines, where the 275mm stroke provides the reach needed to clear large product profiles.
Replacing the Airtac SI100 Standard Cylinder SI100X275 with the SAI100X275
To replace the discontinued SI100X275, order the SAI100X275. Verify your ISO 15552 mounting accessory (LB, FA, CA, TC, etc.), the G1/2 air port thread (PT, G, or NPT), and the M20x1.5 rod-end thread. Because this SKU lacks a magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, specify an SAI100X275S. For sizing, the 100mm bore yields 3927 N push at 0.5 MPa; a neighbouring 80mm bore provides 2513 N, while a 125mm bore offers 6136 N. Since the stroke is 275mm, ensure adequate guide support to prevent rod bending and side-load wear. A plain cylinder does not hold load on air loss—the cushion only decelerates—so use an external pilot check valve or explore the SAIL or BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X275
- ✓ 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 SI100X275 FAQ
Yes, the SI100X275 is discontinued. The direct replacement is the AirTAC SAI100X275. It features the same ISO 15552 mounting interface, 100mm bore, 275mm stroke, output force, and G1/2 port, dropping directly into existing fixtures.
This 100mm bore double-acting cylinder uses a G1/2 air port. The thrust ratings are: 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, and a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X275
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X275 replacement — usually within 7-8 hours.