This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X375, 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 SI100X375
The AirTAC Airtac SI100 Standard Cylinder SI100X375 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 375mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X375, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X375
- 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 SI100X375
The AirTAC SI100X375 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 375 mm stroke, delivering a push force of 3927 N at 0.5 MPa. AirTAC replaced this legacy unit with the SAI100X375, a direct replacement retaining the exact ISO 15552 mounting interface, G1/2 port size, and M20x1.5 rod thread. The SAI upgrade features a redesigned piston seal utilizing two Y-shaped one-way elements for lower start-up pressure and extended service life.
Because this specific SKU lacks the -S magnet suffix, it cannot accept position sensors like the legacy CS1-B or DS1-B switches. For applications requiring load holding on air loss, note that the adjustable 36 mm air cushions only decelerate the piston near stroke end; you will need an external pilot check valve or the SAIL/BSAI lock variants.
Airtac SI100 Standard Cylinder SI100X375 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X375 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X375 |
| Bore size | Ø100 mm |
| Stroke | 375 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 SAI100X375 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 SAI100X375 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 SI100X375
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×375 | 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 SI100X375 Is Used
Heavy-Duty Pressing
Applies the 3927 N push force at 0.5 MPa for seating bearings and assembling large components in automated machinery.
Pallet Diverting
Handles the 375 mm stroke requirement to actuate heavy pallet routing gates and diverters along high-throughput lines.
Material Lift Stops
Uses the 200 kg vertical lift capacity to raise and lower physical stops or indexing pins in goods-to-person systems.
Replacing the Airtac SI100 Standard Cylinder SI100X375 with the SAI100X375
To replace the discontinued SI100X375, order the SAI100X375 and verify your existing fixture matches the ISO 15552 mounting dimensions, G1/2 air port, and M20x1.5 rod thread. If you require position sensing, select an SAI100X375S model instead, as this non-S SKU cannot mount sensors. When sizing, consider neighboring bores: an 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore provides 6136 N. The theoretical maximum force for this 100 mm bore is 801 kgf at 1.0 MPa. For load holding without live air, integrate an external rod lock or pilot check valve, or explore the SAIL or BSAI lock variants. Since the 375 mm stroke is relatively long, ensure external guides are used to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X375
- ✓ 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 SI100X375 FAQ
Yes, the SI100X375 is discontinued. The direct replacement is the AirTAC SAI100X375. It matches the original ISO 15552 mounting interface, 100 mm bore, 375 mm stroke, output force, and G1/2 port, fitting directly into existing fixtures.
The bore features a G1/2 air port and an M20x1.5 rod thread. Force 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 maximum theoretical force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X375
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X375 replacement — usually within 7-8 hours.