This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID200X125S, 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 SID200X125S
The AirTAC Airtac SID Series Double-Rod Cylinder SID200X125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID200X125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAID200X125S
- 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 SID200X125S
The AirTAC SID200X125S is a discontinued double-acting, double-rod ISO 15552 cylinder where a 40mm rod exits both ends on one piston. Because both faces use the rod-side area, push and pull force are equal at 15080 N @0.5 MPa, 21110 N @0.7 MPa, and 27141 N @0.9 MPa. The bore dictates a G3/4 air port, M36x2 rod thread, and 50mm adjustable air cushions at each end. The direct replacement is the SAID200X125S, sharing the same interface, port, and mounting.
The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. 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 SID200X125S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID200X125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID200X125S |
| Bore size | Ø200 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID200X125S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
The SAID200X125S 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 SID200X125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×125 | 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 SID200X125S Is Used
Equal-Force Stamping Press
Drives a stamping die where the return stroke must match the extension force, utilizing the 15080 N @0.5 MPa output equally in both directions without a larger single-rod push discrepancy.
Dual-End Transfer Unit
Uses the rod extending from the rear head to mount a sensor cam, tracking the 125mm stroke position precisely while the front rod pushes a transfer carriage on a conveyor line.
Anti-Rotation Lifting Jib
Lifts heavy pallets or jibs vertically with high resistance to torsional twist, relying on the twin 40mm rods to maintain strict directional stability and prevent load rotation.
Replacing the Airtac SID Series Double-Rod Cylinder SID200X125S with the SAID200X125S
To replace the discontinued SID200X125S, specify the SAID200X125S direct directly, keeping the 200mm bore, 125mm stroke, G3/4 port, and ISO 15552 mounting. Size both ways by verifying the equal push/pull force against your actual load; if 15080 N @0.5 MPa is insufficient, step up to a larger bore, or drop down if oversized. A double-rod design is right when you need anti-rotation stability, equal force in both directions, or a back rod to carry a sensor cam. Reuse FA, LB, or TC mounts directly. The -S magnet supports legacy CS1-B/DS1-B switches. For this 125mm stroke side loads are minimal, but for strokes >=300mm ensure guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID200X125S
- ✓ 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 SID200X125S FAQ
Yes, the SID200X125S is discontinued. The direct replacement is the SAID200X125S. It shares the same ISO 15552 interface, 200mm bore, 125mm stroke, G3/4 port, and mounting hardware. The SAI family also adds an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
Force is equal both ways because the 40mm rod exits both ends: 15080 N @0.5 MPa, 21110 N @0.7 MPa, and 27141 N @0.9 MPa. It operates at 0.15-1.0 MPa (proof 1.5 MPa), -20 to +70 C, and 30-500 mm/s. It features a G3/4 port, M36x2 rod thread, and 50mm adjustable cushions. The -S suffix provides a magnet for legacy CS1-B/DS1-B switches.
Related AirTAC SAI Cylinders
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