This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X155, 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 SI100X155
The AirTAC Airtac SI100 Standard Cylinder SI100X155 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X155, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X155
- 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 SI100X155
The AirTAC SI100X155 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 155 mm stroke. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100X155, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, output force, port size and accessories.
The SAI upgrade features a revised piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet, so it cannot accept CS1-B or DS1-B sensors. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X155 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X155 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X155 |
| Bore size | Ø100 mm |
| Stroke | 155 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 SAI100X155 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 SAI100X155 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 SI100X155
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×155 | 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 SI100X155 Is Used
Heavy-Duty Pressing
Drives large stamping or forming dies requiring substantial end-of-stroke thrust, utilising the 3927 N push force at 0.5 MPa.
Bulk Material Diversion
Actuates heavy-duty diverter arms on high-throughput packaging lines, benefiting from the adjustable 36 mm cushions.
Replacing the Airtac SI100 Standard Cylinder SI100X155 with the SAI100X155
To replace the SI100X155, order the SAI100X155. Verify your ISO 15552 mounting fixture (LB, FA, CA, TC, etc.), the 155 mm stroke, and the G1/2 port thread (PT, G or NPT). Because this original SKU has no magnet, it cannot support position sensing; if you require switches, select an SAI100X155S and use current AirTAC sensors. For sizing alternatives, a neighbouring 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore provides 6136 N. Remember that a standard cylinder drifts without live air; the cushions only decelerate. For load holding on air loss, explore the SAIL or BSAI lock variants, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X155
- ✓ 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 SI100X155 FAQ
Yes, the AirTAC SI100X155 is discontinued. The direct replacement is the SAI100X155. It shares the identical ISO 15552 mounting interface, 100 mm bore, 155 mm stroke, output force, G1/2 port and mounting accessories, fitting directly into existing fixtures.
This 100 mm bore double-acting cylinder features a G1/2 air port and a 25 mm piston rod. It generates 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 SAI100X155
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X155 replacement — usually within 7-8 hours.