This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1700, 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 SI50 Standard Cylinder SI50X1700
The AirTAC SI50 Standard Cylinder SI50X1700 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1700mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1700, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1700
- 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 SI50 Standard Cylinder SI50X1700
The AirTAC SI50X1700 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 1700mm stroke. It delivers 982N push and 825N pull at 0.5MPa via a G1/4 port. Because 1700mm exceeds the 1200mm standard maximum for this bore, it is a non-standard, made-to-order item requiring external guidance to prevent rod bending.
The direct replacement is the SAI50X1700, matching the exact ISO 15552 mounting interface, output force, and port size. The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50X1700 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1700 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1700 |
| Bore size | Ø50 mm |
| Stroke | 1700 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X1700 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X1700 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X1700
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1700 | 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 SI50 Standard Cylinder SI50X1700 Is Used
Long-Reach Transfer
Pushes products between distant conveyor lanes using the full 1700mm extension, guided externally to prevent rod sag.
High-Bay Ejection
Actuates deep-storage ejectors in automated warehouses, utilizing the 982N push force at 0.5MPa to clear pallets.
Replacing the Airtac SI50 Standard Cylinder SI50X1700 with the SAI50X1700
To replace this SI50X1700, order the SAI50X1700. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 port, and the M16x1.5 rod thread. Because this is a 1700mm non-standard stroke exceeding the 1200mm maximum, ensure external guides support the rod to prevent side-load bending. A plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or the SAIL/BSAI lock variant for load holding. If sizing down, a 40mm bore gives 628N at 0.5MPa; sizing up to 63mm yields 1559N. This no-magnet version cannot take switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1700
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X1700 FAQ
Yes, the SI50X1700 is discontinued. The direct replacement is the AirTAC SAI50X1700. It shares the identical ISO 15552 mounting interface, 50mm bore, 1700mm stroke, G1/4 port, and output force, fitting existing fixtures perfectly.
This double-acting cylinder uses a G1/4 port. The thrust ratings are: 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa. Speed range is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1700
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1700 replacement — usually within 7-8 hours.