This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X175, 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 SID125X175
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X175 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 175mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X175, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X175
- 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 SID125X175
The AirTAC SID125X175 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. This SKU has no -S magnet and cannot take a sensor. It features a 32 mm rod, M27x2 thread, 40 mm adjustable cushions, a G1/2 port, and a 30-500 mm/s speed range. The SID line is discontinued; the direct replacement is the SAID125X175, sharing the same interface, force, and mounting.
The SAID upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life, adding SAIL and BSAI lock variants the SI line lacked. A plain cylinder drifts on air loss; cushions only decelerate, so use an external rod lock for held loads.
Airtac SID Series Double-Rod Cylinder SID125X175 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X175 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X175 |
| Bore size | Ø125 mm |
| Stroke | 175 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID125X175 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAID125X175 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 SID125X175
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | 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).
Where the Airtac SID Series Double-Rod Cylinder SID125X175 Is Used
Twin-Tool Machining Station
Drives two opposing machining heads from a single piston, utilizing the equal both ways force to deliver 5734 N @0.5 MPa cutting pressure in both directions.
Anti-Rotation Transfer Gate
Uses the dual exiting rods to prevent mechanical twisting during heavy lateral transfers, maintaining precise 125 mm bore alignment without external guides.
Symmetric Pallet Pusher
Pushes and retracts pallets with identical 8028 N @0.7 MPa force on both strokes, ensuring consistent positioning speed regardless of travel direction.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X175 with the SAID125X175
Replace the discontinued SID125X175 directly with the SAID125X175, reusing the exact ISO 15552 mounting interface and G1/2 port. To size both ways, note the equal force is 5734 N @0.5 MPa; if you need less force, step down to the 100 mm bore (3681 N @0.5 MPa), or step up to the 160 mm bore (9425 N @0.5 MPa) for more. Choose a double-rod design when you need anti-rotation stability or need to drive two tools from one piston. Reuse FA, LB, or TC mounts. As this SKU lacks the -S magnet, it cannot accept sensors. For this 175 mm stroke, side-load is minimal, but for strokes >=300 mm ensure guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X175
- ✓ 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 SID125X175 FAQ
Yes, the SID125X175 is discontinued. The direct replacement is the SAID125X175, which matches the ISO 15552 interface, 175 mm stroke, G1/2 port, and mounting hardware. The SAI family also adds an upgraded piston seal and lock variants.
Because it is a double-rod cylinder, force is equal both ways: 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. The air port is G1/2. It operates at 30-500 mm/s with 40 mm adjustable cushions at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X175
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X175 replacement — usually within 7-8 hours.