This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X75S, 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 SID125X75S
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 75mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X75S
- 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 SID125X75S
The AirTAC SID125X75S is a discontinued double-acting double-rod ISO 15552 cylinder where a rod exits both ends, making push and pull force equal at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. It features a 125mm bore, 75mm stroke, 32mm rod, M27x2 thread, 40mm adjustable cushions, G1/2 port, and 30-500 mm/s speed. The direct replacement is the SAID125X75S, sharing the same interface and force.
The SAI upgrade uses an upgraded two Y-shaped one-way piston seal for low start-up pressure. The rear rod can carry a sensor cam for -S magnet switches. Note: air cushions only decelerate; use an external rod lock or SAIL/BSAI variant for load holding.
Airtac SID Series Double-Rod Cylinder SID125X75S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X75S |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAID125X75S 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 SAID125X75S 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 SID125X75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SID125X75S Is Used
Twin-Tool Machining Station
Drives two opposing machining heads simultaneously from one piston, utilizing the equal both ways force to ensure perfectly balanced cutting pressure on both sides.
Anti-Rotation Transfer Gate
Uses the dual exiting rods to prevent mechanical rotation during heavy lateral transfers, maintaining precise alignment without external guide bushings.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X75S with the SAID125X75S
Replace the discontinued SID125X75S directly with the SAID125X75S, reusing the exact ISO 15552 mounting interface (Basic, FA, LB, TC) and G1/2 port. Size both ways by checking neighbor bores if you need more or less equal force. Choose a double-rod cylinder when you need anti-rotation stability or need to drive two tools. The -S suffix means a piston magnet is present for CS1-B/DS1-B switches. For this 75mm stroke, side-load is minimal, but for stroke >=300 ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X75S
- ✓ 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 SID125X75S FAQ
Yes, the SID125X75S is discontinued. The direct replacement is the SAID125X75S. It shares the same ISO 15552 mounting interface, 125mm bore, 75mm stroke, G1/2 port, and equal both ways force.
Force is equal both ways at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. Operating pressure is 0.15-1.0 MPa. Speed is 30-500 mm/s. It uses a G1/2 port and 40mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X75S replacement — usually within 7-8 hours.