This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X450, 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 SID40X450
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 450mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke450 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X450
- 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 SID40X450
The AirTAC SID40X450 is a double-acting, double-rod ISO 15552 cylinder where a Ø16 mm rod exits both ends on one piston. This geometry means both faces use the rod-side area, making push and pull force equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The bore sets the air port to G1/4, with M12x1.25 rod threads and 27 mm adjustable cushions at each end. This specific SID model is discontinued and end-of-life; the direct replacement is the SAID40X450, matching the 450 mm stroke, interface, and force.
The SAI replacement family uses an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Because this SKU lacks the -S magnet, it cannot take a magnetic switch. A plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID40X450 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X450 |
| Bore size | Ø40 mm |
| Stroke | 450 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 SAID40X450 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 SAID40X450 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 SID40X450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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 SID40X450 Is Used
Equal-Force Transfer
Drives a conveyor divert gate where identical push and pull force keeps the 450 mm stroke balanced during part routing.
Dual-Tool Machining
The extended back rod carries a secondary tool or cam, operating two separate workstations from one 40 mm bore cylinder.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X450 with the SAID40X450
Replace the discontinued SID40X450 directly with the SAID40X450; it reuses the exact ISO 15552 mounting interface, G1/4 port, and 450 mm stroke. Size both ways by confirming the 528 N @0.5 MPa equal force is sufficient, or step to neighbouring bores like 50 mm or 32 mm for more or less power. A double rod is right when you need equal push/pull force, anti-rotation stability, or a back rod to drive a second tool. Reuse FA, LB, or TC mounts. For the 450 mm stroke, add external guides to prevent rod bending under side loads. This non-magnetic SKU cannot use sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X450
- ✓ 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 SID40X450 FAQ
Yes, the SID40X450 is discontinued. The direct replacement is the SAID40X450, which matches the ISO 15552 mounting, 40 mm bore, 450 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 bore dictates a G1/4 air port, a Ø16 mm rod, M12x1.25 threads, and 27 mm cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X450
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X450 replacement — usually within 7-8 hours.