This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X500, 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 SID40X500
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X500 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 SAID40X500, 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 → SAID40X500
- 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 SID40X500
The AirTAC SID40X500 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. This bore uses a 16 mm rod, M12x1.25 thread, and a fixed G1/4 port. The SID40X500 is discontinued and the direct replacement is the SAID40X500, sharing the same interface, 500 mm stroke, and mounting.
Because the second rod can carry a sensor cam or drive two tools simultaneously while resisting rotation, double-rod designs excel in precision handling. The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) and cannot accept switches; it also will not hold loads without live air.
Airtac SID Series Double-Rod Cylinder SID40X500 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X500 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X500 |
| 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 SAID40X500 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 SAID40X500 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 SID40X500
| 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 SID40X500 Is Used
Dual-End Transfer Pusher
Drives a transfer arm on one end and a synchronised kicker on the opposite rod end, keeping stroke perfectly balanced across a conveyor belt.
Anti-Rotation Gripper Slide
Uses the twin rods to resist twist during tight-tolerance part gripping, preventing jaw deflection on automated machining centers.
Symmetrical Loading Station
Indexes two identical workpieces simultaneously from opposite sides, cutting cycle time in half by utilizing equal force in both directions.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X500 with the SAID40X500
To replace the discontinued SID40X500, install the direct replacement SAID40X500, which preserves the ISO 15552 mounting interface, G1/4 port, and equal-both-ways force. Size both directions by matching the 528 N @0.5 MPa output; if more force is needed, step up to the 50 mm bore, or drop to 32 mm for lighter loads. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. Reuse FA, LB, or TC mounts. Since this non-magnetic SKU cannot take sensors, add external detection if needed. For the 500 mm stroke, use external guides to prevent rod bending under side loads. For load holding, add an external rod lock or check valve, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X500
- ✓ 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 SID40X500 FAQ
Yes, the SID40X500 is discontinued. The direct replacement is the SAID40X500. It matches the ISO 15552 interface, 40 mm bore, 500 mm stroke, G1/4 port, and equal-both-ways force. The SAI family also adds upgraded Y-shaped piston seals.
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. The fixed air port is G1/4. It uses a 16 mm rod with an M12x1.25 thread and 27 mm adjustable cushions at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X500
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X500 replacement — usually within 7-8 hours.