This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X700STC, 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 SI50X700STC
The AirTAC Airtac SI50 Standard Cylinder SI50X700STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 700mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X700STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X700STC
- 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 SI50X700STC
The AirTAC SI50X700STC is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 700mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50X700STC, matching the exact ISO 15552 mounting interface, force, and TC trunnion accessory.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. The family adds SAIL, SAIF, and BSAI lock variants absent in the SI line. The -S magnet works with CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50X700STC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X700STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X700STC |
| Bore size | Ø50 mm |
| Stroke | 700 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 SAI50X700STC 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 SAI50X700STC 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 SI50X700STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×700 | 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 SI50X700STC Is Used
Long-Stroke Diversion
Drives a 700mm routing gate on a packaging conveyor, utilizing the 982N push force to reliably pivot heavy product flow lanes.
Automated Press Ejection
Extracts formed parts from a hydraulic press using the TC trunnion mount to accommodate the pivot arc during the 700mm extraction cycle.
Replacing the Airtac SI50 Standard Cylinder SI50X700STC with the SAI50X700STC
To replace the SI50X700STC, order the SAI50X700STC. Verify the ISO 15552 TC trunnion mounting, 50mm bore, 700mm stroke, G1/4 port (PT/G/NPT threads), and the -S magnet for CS1-B/DS1-B switches. If sizing up or down, adjacent bores are 40mm (628N push @0.5MPa) and 63mm (1559N push @0.5MPa). Note that a plain cylinder drifts without live air; for load holding use an external pilot check valve or the SAIL/BSAI lock variant. At 700mm stroke, prevent rod bending by using an external guide to absorb side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X700STC
- ✓ 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 SI50X700STC FAQ
Yes, the AirTAC SI50X700STC is discontinued. The direct replacement is the SAI50X700STC. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 700mm stroke, TC trunnion mount, and G1/4 port.
The G1/4 port feeds a 50mm bore yielding 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical max of 200kgf at 1.0MPa. The air cushion is 30mm at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X700STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X700STC replacement — usually within 7-8 hours.