This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X40, 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 SID40X40
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 40mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X40
- 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 SID40X40
The AirTAC SID40X40 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring force is equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It features a 40mm bore, G1/4 port, M12x1.25 rod thread, and 27mm adjustable cushions. This legacy SID model is discontinued and replaced by the direct replacement SAID40X40, which reuses the exact ISO 15552 mounting interface and adds an upgraded two Y-shaped one-way piston seal for lower start-up pressure.
Because the second rod can carry a sensor cam or drive two tools simultaneously while resisting rotation, double-rod architecture is ideal for precise positioning. This non-magnet SKU cannot take a switch. Note that air cushions only decelerate; for load holding without live air, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID40X40 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X40 |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAID40X40 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 SAID40X40 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 SID40X40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SID40X40 Is Used
Dual-Tool Drive Station
Simultaneously drives two opposing tools from one piston, utilizing the equal both ways force to maintain perfectly synchronized machining pressure.
Symmetrical Transfer
Transfers parts equally in both directions across a conveyor belt, using the 528 N @0.5 MPa equal force to ensure consistent push and pull kinematics.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X40 with the SAID40X40
To replace the discontinued SID40X40, specify the SAID40X40 (insert A after S) for identical 40mm bore, 40mm stroke, G1/4 port, and equal both ways force. Size both ways by checking neighboring bores (e.g., 32mm or 50mm) against your exact force needs. Choose a double-rod cylinder when anti-rotation or dual-tool driving is required. Reuse FA, LB, or TC mounts. This SKU lacks a -S magnet, so no sensors can be fitted. For stroke lengths >=300mm, verify side-load bearing limits.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X40
- ✓ 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 SID40X40 FAQ
Yes, the SID40X40 is discontinued. The direct replacement is the SAID40X40, which matches the 40mm bore, 40mm stroke, G1/4 port, and ISO 15552 mounting interface, while adding an upgraded piston seal.
Force is equal both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. Speed is 30-800 mm/s. The cylinder uses a G1/4 port, M12x1.25 rod thread, and 27mm adjustable cushions. It cannot hold loads without live air.
Request a Quote for the SAID40X40
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X40 replacement — usually within 7-8 hours.