This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X500S, 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 SID40X500S
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X500S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 500mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X500S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke500 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X500S
- 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 SID40X500S
The AirTAC SID40X500S is a double-acting, double-rod ISO 15552 cylinder where a 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 is 40 mm, the piston rod is Ø16 mm with an M12x1.25 thread, the air port is G1/4, and adjustable air cushions are 27 mm at each end. This SID model is discontinued and end-of-life; the direct replacement is the SAID40X500S, sharing the same ISO 15552 interface, bore, stroke, force, and mounting.
Because both rods share one piston, the back rod can carry a sensor cam for -S magnet switches (legacy CS1-B/DS1-B) while the front rod drives a tool, offering anti-rotation benefits. The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note that a plain cylinder does not hold its load 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 SID40X500S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X500S |
| Bore size | Ø40 mm |
| Stroke | 500 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 SAID40X500S 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 SAID40X500S 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 SID40X500S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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 SID40X500S Is Used
Dual-Tool Transfer
Drive two opposing tools simultaneously from one piston, using the equal both-ways force to push and pull identical 528 N @0.5 MPa loads.
Anti-Rotation Gripper
Prevent workpiece twist during clamping using the twin rods, while the back rod carries a CS1-B/DS1-B sensor cam for mid-stroke positioning.
Equal-Force Pusher
Push and retract pallets on a 500 mm stroke where identical extension and retraction speeds are critical, relying on the G1/4 port for airflow.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X500S with the SAID40X500S
To replace the discontinued SID40X500S, use the SAID40X500S direct: insert an A after the leading S, keeping the bore, stroke, and -S magnet. Both deliver equal both-ways force (528 N @0.5 MPa), so if you need more thrust, jump to the neighbouring 50 mm bore (825 N @0.5 MPa). A double rod is right when you need anti-rotation, a back-side sensor cam, or dual-tool driving. You can reuse ISO 15552 FA, LB, or TC mounts. The -S suffix means the piston magnet is present for CS1-B/DS1-B switches. For this 500 mm stroke, add external guides to prevent rod bending and manage side loads. Speed is 30-800 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X500S
- ✓ 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 SID40X500S FAQ
Yes, the AirTAC SID40X500S is discontinued. The direct replacement is the SAID40X500S, which shares the same ISO 15552 interface, 40 mm bore, 500 mm stroke, G1/4 port, and mounting hardware. The SAI family also adds an upgraded piston seal and SAIL/BSAI lock variants.
Because it is a double-rod cylinder, 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 cushion only decelerates the load; it does not hold position on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X500S replacement — usually within 7-8 hours.