This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID160X400S, 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 SID160X400S
The AirTAC Airtac SID Series Double-Rod Cylinder SID160X400S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 400mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID160X400S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke400 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAID160X400S
- 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 SID160X400S
The AirTAC SID160X400S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force remains equal both ways at 9425 N @0.5 MPa. This discontinued model features a 160mm bore, 400mm stroke, M36x2 rod thread, G3/4 air port, and 50mm adjustable cushions. The direct replacement is the SAID160X400S, reusing the same mounting interface and port size.
The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors. A plain cylinder drifts on air loss; cushions only decelerate, so use an external rod lock for held loads.
Airtac SID Series Double-Rod Cylinder SID160X400S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID160X400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID160X400S |
| Bore size | Ø160 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID160X400S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø160mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 10053 N | 9425 N |
| 0.7 MPa | 14074 N | — |
| Max (@1.0 MPa) | 2050 kgf | |
The SAID160X400S 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 SID160X400S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×400 | 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 SID160X400S Is Used
Twin-Tool Machining Station
Drives two opposing machining heads simultaneously with equal both-ways force, ensuring perfectly balanced cutting cycles without requiring separate cylinders.
Anti-Rotation Transfer Unit
Uses the dual-rod architecture to resist torsional deflection during heavy lateral transfers on a 160mm bore assembly line conveyor.
External Cam Positioning
Leverages the rear protruding rod to carry a sensor cam, triggering external sequence valves while the front rod executes the primary 400mm work stroke.
Replacing the Airtac SID Series Double-Rod Cylinder SID160X400S with the SAID160X400S
To replace the discontinued SID160X400S, install the direct replacement SAID160X400S, which matches the ISO 15552 mounting interface, bore, stroke, and G3/4 port. When sizing both ways, verify the equal force of 9425 N @0.5 MPa suffices; if more force is needed, step up to the 200mm bore, or drop to 125mm if less is required. A double rod is right when you need anti-rotation stability or must drive two tools simultaneously. Reuse FA, LB, or TC mounts. The -S magnet enables position sensing. Since the 400mm stroke exceeds 300mm, use external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID160X400S
- ✓ 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 SID160X400S FAQ
Yes, the SID160X400S is discontinued. The direct replacement is the SAID160X400S. It shares the identical ISO 15552 interface, 160mm bore, 400mm stroke, G3/4 port, and mounting footprint, while adding an upgraded piston seal for longer life.
Because it is a double-rod cylinder, force is equal both ways: 9425 N @0.5 MPa, 13194 N @0.7 MPa, and 16964 N @0.9 MPa. Operating pressure is 0.15-1.0 MPa. The speed range is 30-500 mm/s, and it features 50mm adjustable air cushions at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID160X400S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID160X400S replacement — usually within 7-8 hours.