This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID80X825STC, 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 SID Series Double-Rod Cylinder SID80X825STC
The AirTAC Airtac SID Series Double-Rod Cylinder SID80X825STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 825mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID80X825STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke825 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAID80X825STC
- 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 SID Series Double-Rod Cylinder SID80X825STC
The AirTAC SID80X825STC is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, making push and pull force equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. This 80mm bore model features a 25mm piston rod, an M20x1.5 rod-end thread, and a fixed G3/8 air port. The SID line is discontinued, so the direct replacement is the SAID80X825STC—identical ISO 15552 interface, bore, stroke, force, port, and mounting.
Because both faces use the rod-side area, output is equal both ways, preventing the unequal push/pull mismatch of single-rod units. The SAI replacement upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. This unit includes an -S piston magnet for legacy CS1-B/DS1-B switches and a TC mounting interface. Note: a plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end.
Airtac SID Series Double-Rod Cylinder SID80X825STC Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID80X825STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID80X825STC |
| Bore size | Ø80 mm |
| Stroke | 825 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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 SAID80X825STC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAID80X825STC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SID Series Double-Rod Cylinder SID80X825STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×825 | 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 SID Series Double-Rod Cylinder SID80X825STC Is Used
Equal-Force Transfer
Drives a conveyor divert arm where identical push and pull force is required to shuttle products evenly in both directions without momentum mismatch.
Dual-Tool Machining
Simultaneously operates two opposing machining heads using the twin rods exiting both ends, ensuring synchronized clamping and milling from either side.
Cam-Driven Sensing
Utilizes the rear protruding rod to carry a sensor cam, allowing external position confirmation while the front rod performs the primary work stroke.
Replacing the Airtac SID Series Double-Rod Cylinder SID80X825STC with the SAID80X825STC
To replace the discontinued SID80X825STC, specify the SAID80X825STC directly—it is a direct swap retaining the ISO 15552 mounting interface, TC accessory, G3/8 port, and equal both-ways force. When sizing, verify both directions match your needs; if 3175 N @0.7 MPa is excessive, step down to the 63mm bore (1962 N @0.7 MPa), or if insufficient, step up to the 100mm bore (5153 N @0.7 MPa). A double-rod design is correct when you need equal force both ways, anti-rotation stability, or a back rod to carry a sensor cam. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. Because the stroke is 825mm, you must account for side-load and rod-bending risks by using external guides to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID80X825STC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SID Series Double-Rod Cylinder SID80X825STC FAQ
Yes, the SID80X825STC is discontinued. The direct replacement is the SAID80X825STC, which shares the same ISO 15552 interface, 80mm bore, 825mm stroke, G3/8 port, TC mounting, and equal both-ways force. The SAI family also adds upgraded piston seals and SAIL/BSAI lock variants the SI line lacked.
Force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. Speed is 30-800 mm/s. The cushion only decelerates near stroke end; it does not hold loads on air loss. For held loads, use an external rod lock, pilot-operated check valve, or the SAIL/BSAI lock variant.
Related AirTAC SAI Cylinders
Request a Quote for the SAID80X825STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAID80X825STC replacement — usually within 7-8 hours.