This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X800S, 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 SID125X800S
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X800S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 800mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X800S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X800S
- 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 SID125X800S
The AirTAC SID125X800S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, making the push and pull force equal at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. This model is discontinued; the direct replacement is the SAID125X800S, sharing the same G1/2 port, M27x2 rod thread, and 40mm adjustable cushion. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life.
With an 800mm stroke and 32mm rod, the dual-rod design prevents rotation and lets the back rod carry a sensor cam. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. A plain cylinder does not hold loads on air loss; cushions only decelerate, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID125X800S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X800S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X800S |
| Bore size | Ø125 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID125X800S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAID125X800S 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 SID125X800S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SID125X800S Is Used
Twin-Tool Machining Station
Drives two opposing machining heads simultaneously with equal 5734 N force both ways, ensuring balanced material removal without requiring a second cylinder.
Anti-Rotation Transfer Gate
Uses the double-rod architecture to prevent mechanical rotation during a 800mm transfer stroke, maintaining precise alignment for incoming workpieces.
Cam-Actuated Positioning
Leverages the rear exiting rod to carry a sensor cam, tracking the full 800mm travel while the front rod applies 8028 N @0.7 MPa of clamping force.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X800S with the SAID125X800S
To replace the discontinued SID125X800S, install the direct replacement SAID125X800S, reusing the existing ISO 15552 mounting interface (Basic, FA, LB, TC, FTC, TCM1, TCM2) without bracket changes. Size both ways by checking neighbour bores: the 100mm bore yields 3681 N @0.5 MPa, and the 160mm bore yields 9425 N @0.5 MPa, but the 125mm bore provides equal 5734 N force in both directions. Choose a double-rod cylinder when you need anti-rotation, to drive two tools, or to mount a sensor cam on the back rod. The -S magnet supports legacy CS1-B/DS1-B switches (the SAI replacement uses current AirTAC switches). For this 800mm stroke, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X800S
- ✓ 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 SID125X800S FAQ
Yes, the AirTAC SID125X800S is discontinued. The direct replacement is the SAID125X800S. It shares the same ISO 15552 interface, 125mm bore, 800mm stroke, G1/2 port, and mounting options, while adding an upgraded two Y-shaped one-way piston seal for longer life.
Because it is a double-rod cylinder, force is equal both ways: 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X800S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X800S replacement — usually within 7-8 hours.