This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X80, 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 SID40X80
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X80 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X80, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X80
- 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 SID40X80
The AirTAC SID40X80 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on a single piston. Because both faces use the rod-side area, push and pull force are equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. This model is discontinued and the direct replacement is the SAID40X80, sharing the same G1/4 port, M12x1.25 rod thread, 27 mm cushion, and ISO 15552 mounting interface. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life.
With a 40 mm bore and 80 mm stroke, the double-rod design prevents rotation and lets the back rod drive a second tool or sensor cam. This non-magnetic SKU cannot take a sensor switch. A plain cylinder does not hold loads on air loss; the cushion only decelerates. For held loads use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID40X80 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X80 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X80 |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAID40X80 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 SAID40X80 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 SID40X80
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SID40X80 Is Used
Dual-End Transfer Pusher
Drives a transfer finger on the front rod while the back rod simultaneously indexes a diverter cam on the return conveyor lane.
Anti-Rotation Gripper Slide
Uses the twin rods exiting both ends to resist torsional twist during heavy clamping, keeping the gripper jaw perfectly aligned.
Synchronized Tooling Shuttle
Moves two independent machining fixtures in opposite directions simultaneously using a single 40 mm bore pneumatic piston.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X80 with the SAID40X80
Replace the discontinued SID40X80 directly with the SAID40X80, reusing your existing FA, LB, or TC ISO 15552 mounts. Size both ways by checking equal force at neighbouring bores: the 32 mm bore yields 345 N @0.5 MPa, while the 50 mm bore yields 825 N @0.5 MPa. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. This SKU lacks the -S magnet, so it cannot support legacy CS1-B/DS1-B sensors. For strokes >=300 mm, verify side-load limits to prevent guide wear. Remember that air cushions only decelerate; they do not hold loads without live air.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X80
- ✓ 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 SID40X80 FAQ
Yes, the SID40X80 is discontinued. The direct replacement is the SAID40X80, which matches the ISO 15552 mounting interface, 40 mm bore, 80 mm stroke, G1/4 port, and force ratings. The SAI family also adds SAIL and BSAI lock variants.
The G1/4 port bore 40 mm cylinder provides equal force both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa.
Request a Quote for the SAID40X80
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X80 replacement — usually within 7-8 hours.