This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X120S, 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 SID125X120S
The AirTAC SID Series Double-Rod Cylinder SID125X120S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 120mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X120S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X120S
- 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 SID125X120S
The AirTAC SID125X120S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston. 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 bore uses a 32mm rod, M27x2 thread, G1/2 port, and 40mm adjustable cushions. The SID is discontinued; the direct replacement is SAID125X120S.
The SAID upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life, while keeping the exact ISO 15552 mounting interface, bore, stroke, and port. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. A plain cylinder drifts on air loss; cushions only decelerate, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID125X120S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X120S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X120S |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAID125X120S 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 SAID125X120S 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 SID125X120S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SID125X120S Is Used
Equal-Force Stamping
Drives a stamping die where the return stroke must deliver the same 8028 N @0.7 MPa force as the advance, ensuring consistent part ejection on both strokes.
Dual-Tool Transfer
Mounts a gripper on the front rod and a sensor cam on the back rod, allowing a single 125mm bore to shift parts on a conveyor while tracking position externally.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X120S with the SAID125X120S
To replace the discontinued SID125X120S, install the SAID125X120S directly; it preserves the G1/2 port, 120mm stroke, and ISO 15552 mounting holes (Basic, FA, LB, TC, FTC, TCM1, TCM2) with no bracket changes. Size both ways by confirming the 125mm bore provides equal 5734 N force in both directions; if less force is acceptable, step down to the 100mm bore (3681 N @0.5), or step up to 160mm (9425 N @0.5) for higher capacity. Choose a double-rod configuration when you need anti-rotation stability, or when the back rod must carry a sensor cam to track position from the opposite end. The -S magnet enables position sensing. For strokes >=300mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X120S
- ✓ 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 SID125X120S FAQ
Yes, the SID125X120S is discontinued. The direct replacement is the SAID125X120S. It shares the same ISO 15552 interface, 125mm bore, 120mm stroke, G1/2 port, and equal both-ways force. The SAI family adds an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
Force is equal both ways: 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. Speed is 30-500 mm/s. The cylinder does not hold loads on air loss; the 40mm adjustable cushions only decelerate near stroke end. For held loads, use an external rod lock, pilot-operated check valve, or the SAIL/BSAI lock variant.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X120S
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