This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X500H, 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 SID125X500H
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X500H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 500mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X500H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X500H
- 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 SID125X500H
The AirTAC SID125X500H is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring force is equal both ways at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. This Viton H sealed unit handles 0 to 150 C, uses a G1/2 port, M27x2 rod thread, and 40 mm cushions. This SKU lacks the S suffix and cannot take a magnetic switch. The SID line is discontinued; the direct replacement is the SAID125X500H, sharing the same bore, stroke, and ISO 15552 mounting interface.
Replacing the SID with the SAID125X500H retains the equal-both-ways force and introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. Because both faces use the rod-side area, the back rod can drive a second tool without force loss. Note that air cushions only decelerate near stroke end; for load holding on air loss, use an external rod lock or pilot-operated check valve.
Airtac SID Series Double-Rod Cylinder SID125X500H Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X500H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X500H |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAID125X500H 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 SAID125X500H 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 SID125X500H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SID125X500H Is Used
Twin-Tool Machining Station
Drives two opposing machining heads simultaneously from one piston, utilizing the equal both ways force to maintain perfectly synchronized cutting pressure.
High-Temp Transfer Pusher
Employs the Viton H seals rated for 0 to 150 C to reliably push hot workpieces along a conveyor without degrading the elastomers.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X500H with the SAID125X500H
To replace the discontinued SID125X500H, specify the SAID125X500H direct, which preserves the G1/2 port, M27x2 thread, and ISO 15552 mounting. Size both ways by checking neighbor bores if you need less force, but remember the double-rod design yields equal push and pull force. Choose a double-rod cylinder when anti-rotation or driving two tools simultaneously is required. Mounting options include Basic, FA, LB, and TC. Because this SKU lacks the S suffix, it cannot take a magnetic switch; add an external sensor cam if needed. For the 500 mm stroke, external guides are recommended to prevent rod bending under side loads. The SAI family also adds SAIL and BSAI lock variants for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X500H
- ✓ 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 SID125X500H FAQ
Yes, the SID125X500H is discontinued. The direct replacement is the SAID125X500H, which shares the same ISO 15552 mounting interface, 125 mm bore, 500 mm stroke, G1/2 port, and equal both ways force. The SAID upgrade features an improved piston seal with two Y-shaped one-way elements.
Force is equal both ways at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. Speed is 30-500 mm/s. It features a G1/2 port, 40 mm adjustable cushions, and Viton H seals for 0 to 150 C.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X500H
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X500H replacement — usually within 7-8 hours.