This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID63X175, 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.

The AirTAC Airtac SID Series Double-Rod Cylinder SID63X175 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 175mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID63X175, which matches its ISO interface, bore, stroke, force and mounting.
The AirTAC SID63X175 is a discontinued double-acting double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. It features a 63mm bore, 175mm stroke, G3/8 air port, M16x1.5 rod thread, and 30mm adjustable cushions. The direct replacement is the SAID63X175, retaining the same mounting interface, bore, stroke, and force.
This configuration provides anti-rotation stability and allows the back rod to drive a second tool. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnetic SKU cannot take a switch. A plain cylinder does not hold loads on air loss; cushions only decelerate, so use an external rod lock or SAIL/BSAI variant for held loads.
| Model | Airtac SID Series Double-Rod Cylinder SID63X175 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID63X175 |
| Bore size | Ø63 mm |
| Stroke | 175 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID63X175 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAID63X175 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×175 | 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).
Drives two opposing tools simultaneously from a single piston, utilizing the equal push and pull force of 1962 N @0.7 MPa for balanced material removal.
The twin-rod geometry prevents mechanical twisting during high-speed package routing, ensuring precise alignment without external guide rails.
To replace the discontinued SID63X175, install the direct replacement SAID63X175 which matches the ISO 15552 mounting interface, G3/8 port, and 175mm stroke. Size both ways by confirming the equal force of 1402 N @0.5 MPa is sufficient; neighbouring bores like 50mm or 80mm offer 825 N or 2268 N respectively. Choose a double-rod design when you need anti-rotation stability or dual-tool actuation. Reuse FA, LB, or TC mounts. This non-magnetic SKU cannot support sensors. For stroke lengths >=300mm, verify side-load limits to prevent guide wear.
Replacement checklist
Yes, the SID63X175 is discontinued. The direct replacement is the SAID63X175, which shares the identical ISO 15552 interface, 63mm bore, 175mm stroke, G3/8 port, and mounting hardware. The SAI family also adds upgraded piston seals and SAIL or BSAI lock variants.
Because it is a double-rod cylinder, force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The air port is G3/8, the rod thread is M16x1.5, and it features 30mm adjustable cushions. It operates at 0.15-1.0 MPa with speeds of 30-800 mm/s.
Send us the quantity and destination. We confirm price, stock and lead time on the SAID63X175 replacement — usually within 7-8 hours.