This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X800, 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 SID40X800
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X800 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 800mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X800, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X800
- 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 SID40X800
The AirTAC SID40X800 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, making push and pull force equal at 528 N (@0.5 MPa). This SKU has no -S magnet and cannot take a sensor. The SID40X800 is discontinued; the direct replacement is the SAID40X800, sharing the G1/4 port, M12x1.25 thread, and 27 mm cushions.
Because both faces use the identical rod-side area, force is equal both ways (528/739/950 N at 0.5/0.7/0.9 MPa). The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure. Note: air cushions only decelerate; use an external rod lock or SAIL/BSAI for load holding.
Airtac SID Series Double-Rod Cylinder SID40X800 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X800 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X800 |
| Bore size | Ø40 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID40X800 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAID40X800 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 SID40X800
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | 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 SID40X800 Is Used
Dual-End Transfer Pusher
Simultaneously indexes two workpieces on parallel conveyor lanes using equal push and pull force without stroke imbalance.
Anti-Rotation Gripper Slide
The twin-rod geometry prevents mechanical twist during rapid clamping, maintaining jaw alignment on precision machining centers.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X800 with the SAID40X800
Replace the discontinued SID40X800 directly with the SAID40X800, reusing the existing ISO 15552 FA, LB, or TC mounts. When sizing both ways, verify the equal force (528 N @0.5 MPa) meets your needs; if undersized, step to the 50 mm bore (825 N). A double rod is right when you need anti-rotation, or to drive two tools from one piston. This SKU lacks the -S magnet, so it cannot use legacy CS1-B/DS1-B sensors. For the 800 mm stroke, add external guides to prevent rod bending and side-load damage. Remember, a plain cylinder drifts on air loss; use a pilot-operated check valve or SAIL/BSAI lock variant to hold loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X800
- ✓ 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 SID40X800 FAQ
Yes, the SID40X800 is discontinued. The direct replacement is the SAID40X800, which shares the same ISO 15552 interface, 40 mm bore, 800 mm stroke, G1/4 port, and equal both ways force.
Force is equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The air port is G1/4, the rod thread is M12x1.25, and it features 27 mm adjustable cushions at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X800
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X800 replacement — usually within 7-8 hours.