This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X125SH, 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 SID125X125SH
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X125SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X125SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X125SH
- 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 SID125X125SH
The AirTAC SID125X125SH is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force is equal both ways at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. This bore features a 32mm rod, M27x2 thread, 40mm adjustable cushion, and a G1/2 port. This legacy unit is discontinued; the direct replacement is the SAID125X125SH, sharing the same interface, bore, stroke, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The H seal allows 0-150 C operation. Note that air cushions only decelerate; for load holding without live air, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID125X125SH Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X125SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X125SH |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAID125X125SH 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 SAID125X125SH 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 SID125X125SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | 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 SID125X125SH Is Used
Twin-Tool Machining Station
Drives two opposing machining heads simultaneously from one central piston, utilizing the equal both ways force to maintain perfectly synchronized cutting pressure.
Anti-Rotation Diverter
Uses the dual-rod architecture to prevent mechanical twist during high-speed package diversion on a conveyor, ensuring precise tracking without external guides.
Symmetrical Lift Gate
Employs the back rod as a sensor cam to trigger reed switches while raising a heavy 292kg vertical lift gate, relying on the equal force for smooth descent.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X125SH with the SAID125X125SH
To replace the discontinued SID125X125SH, install the SAID125X125SH directly; it preserves the ISO 15552 mounting interface, 125mm bore, 125mm stroke, and G1/2 port. Size both ways by checking equal force across neighbor bores (100mm or 160mm) to ensure the application fits the 5734 N @0.5 MPa baseline. A double rod is right when you need anti-rotation stability or must drive two tools simultaneously. Reuse FA, LB, or TC mounts. The S suffix indicates a piston magnet for CS1-B/DS1-B switches. For strokes >=300mm, verify side-load limits to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X125SH
- ✓ 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 SID125X125SH FAQ
Yes, the SID125X125SH is discontinued. The direct replacement is the SAID125X125SH, which matches the ISO 15552 interface, bore, stroke, G1/2 port, and equal both ways force.
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 bore dictates a G1/2 port, a 32mm rod, and a 40mm cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X125SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X125SH replacement — usually within 7-8 hours.