This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X30S, 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 SID40X30S
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 30mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke30 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X30S
- 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 SID40X30S
The AirTAC SID40X30S is a double-acting double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force is equal both ways (528 N @0.5 MPa). This model is discontinued; the direct replacement is the SAID40X30S. It shares the same G1/4 port, M12x1.25 rod thread, and 27 mm cushion. The SAI upgrade uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
Because the second rod acts as an anti-rotation guide and can carry a sensor cam for end-position feedback, this design is ideal for driving two synchronized tools. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches.
Airtac SID Series Double-Rod Cylinder SID40X30S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X30S |
| Bore size | Ø40 mm |
| Stroke | 30 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 SAID40X30S 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 SAID40X30S 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 SID40X30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 SID40X30S Is Used
Synchronized Tool Driving
Drives two opposing tools simultaneously from a single piston, utilizing the equal both-ways force to ensure perfectly balanced machining or forming pressure.
Anti-Rotation Transfer
Transfers parts across a conveyor using the inherent anti-rotation properties of the double-rod design, preventing jaw deflection without external guides.
Dual-End Position Feedback
Uses the rear extending rod to carry a sensor cam, allowing legacy CS1-B/DS1-B switches to confirm end positions without interfering with the primary work area.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X30S with the SAID40X30S
To replace the discontinued SID40X30S, specify the SAID40X30S, which matches the 40 mm bore, 30 mm stroke, and ISO 15552 mounting interface (Basic, FA, LB, TC). Size both directions by verifying the equal force fits your load; if more force is needed, step up to the 50 mm bore (825 N @0.5 MPa), or drop to the 32 mm bore (345 N) for lighter duties. A double rod is the right choice when you need anti-rotation stability or must drive two tools from one piston. For strokes over 300 mm, verify side-load limits to prevent binding. Remember that a plain cylinder does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X30S
- ✓ 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 SID40X30S FAQ
Yes, the SID40X30S is discontinued. The direct replacement is the SAID40X30S. It shares the same ISO 15552 interface, 40 mm bore, 30 mm stroke, G1/4 port, and mounting options, while adding an upgraded piston seal.
Force is equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It operates at 0.15-1.0 MPa, runs at 30-800 mm/s, and features a 16 mm rod, M12x1.25 thread, and 27 mm adjustable cushions. The air cushion only decelerates near stroke end; it does not hold loads on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X30S replacement — usually within 7-8 hours.