This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X35, 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 SID40X35
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X35 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 35mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X35, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke35 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X35
- 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 SID40X35
The AirTAC SID40X35 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal push and pull force of 528 N at 0.5 MPa. This SKU has no -S magnet and cannot accept a sensor. It features a 16 mm rod, M12x1.25 thread, G1/4 port, and 27 mm cushions. This discontinued model is replaced by the SAID40X35.
The SAID40X35 is a direct replacement retaining the exact ISO 15552 interface, bore, stroke, and mounting. The SAI family uses an upgraded two Y-shaped one-way piston seal for low start-up pressure and long life. The air cushion only decelerates near stroke end; it does not hold loads on air loss.
Airtac SID Series Double-Rod Cylinder SID40X35 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X35 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X35 |
| Bore size | Ø40 mm |
| Stroke | 35 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 SAID40X35 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 SAID40X35 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 SID40X35
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×35 | 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 SID40X35 Is Used
Gripper Cam Actuation
Drives an external cam mechanism from the back rod while the front rod pushes the primary tool, keeping force balanced at 528 N.
Dual-Side Transfer
Pushes a workpiece simultaneously from both ends of the conveyor lane to align it without rotational twist.
Compact Ejector Station
Ejects finished parts using the 35 mm stroke, relying on the equal pull force to retract the tool cleanly.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X35 with the SAID40X35
To replace the discontinued SID40X35, use the SAID40X35, which matches the G1/4 port, 16 mm rod, and ISO 15552 mounting. Because force is equal both ways, sizing is symmetrical; if more force is needed, step up to the 50 mm bore, or drop to 32 mm for lighter loads. A double rod is right when you need anti-rotation stability or want to drive two tools from one piston. Mounting options include Basic, FA, LB, and TC. This SKU lacks a magnet, so no sensor can be fitted. For stroke lengths over 300 mm, account for side-load deflection.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X35
- ✓ 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 SID40X35 FAQ
Yes, the SID40X35 is discontinued. The direct replacement is the SAID40X35, which shares the same ISO 15552 interface, 40 mm bore, 35 mm stroke, G1/4 port, and mounting.
Force is equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. Speed is 30-800 mm/s. It uses a G1/4 port and 27 mm adjustable cushions.
Request a Quote for the SAID40X35
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X35 replacement — usually within 7-8 hours.