This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X220, 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 SID125X220
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X220 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 220mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X220, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X220
- 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 SID125X220
The AirTAC SID125X220 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, so push and pull force are equal at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. This specific SKU is discontinued and end-of-life; the direct replacement is the SAID125X220. It shares the same ISO 15552 mounting interface, 125mm bore, 220mm stroke, G1/2 air port, M27x2 rod thread, and 40mm adjustable air cushion at each end.
Because the second rod protrudes from the rear cap, it inherently resists rotation and can drive two tools simultaneously. The SAI successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note this non-magnetic SKU cannot accept a sensor 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 SID125X220 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X220 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X220 |
| Bore size | Ø125 mm |
| Stroke | 220 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 SAID125X220 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 SAID125X220 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 SID125X220
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×220 | 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 SID125X220 Is Used
Twin-Tool Synchronous Drive
Drives two opposing machining or forming heads simultaneously from a single piston, ensuring perfectly matched timing and equal force on both strokes.
Anti-Rotation Transfer Pusher
Transfers heavy workpieces along a conveyor without rotational drift, using the dual-rod geometry to maintain strict directional stability.
Symmetric Lifting Fixture
Lifts and lowers guided pallet fixtures with equal push and pull force, preventing binding in vertical material handling operations.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X220 with the SAID125X220
To replace the discontinued SID125X220, install the SAID125X220 directly; it preserves the ISO 15552 mounting interface, 125mm bore, 220mm stroke, G1/2 port, and equal both-ways force. When sizing both ways, verify your force requirements against the 5734 N @0.5 MPa rating, or step to neighbouring bores if more capacity is needed. A double-rod design is the right choice when you need anti-rotation stability, wish to mount a sensor cam on the back rod, or must drive two tools from one cylinder. Reuse your existing FA, LB, or TC mounts. This SKU lacks the -S magnet and cannot take a sensor. For strokes of 300mm or longer, carefully manage side-load alignment to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X220
- ✓ 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 SID125X220 FAQ
Yes, the AirTAC SID125X220 is discontinued. The direct replacement is the SAID125X220. It shares the same ISO 15552 mounting interface, 125mm bore, 220mm stroke, G1/2 port, and equal both-ways force, while adding an upgraded Y-shaped piston seal.
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, the rod thread is M27x2, and the operating speed range is 30-500 mm/s. It features a 40mm adjustable air cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X220
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X220 replacement — usually within 7-8 hours.