This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X75, 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 SID125X75
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X75 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 SAID125X75, 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 → SAID125X75
- 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 SID125X75
The AirTAC SID125X75 is a 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. This SKU has no -S magnet and cannot support reed sensors. It is discontinued; the direct replacement is the SAID125X75, sharing the exact 125mm bore, 75mm stroke, G1/2 port, and M27x2 rod thread.
Because both faces use the rod-side area, the double-rod layout prevents rod rotation and lets the back rod drive a second tool. The SAID upgrade adds a two-piece Y-shaped piston seal for lower start-up pressure. Note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant to hold loads on air loss.
Airtac SID Series Double-Rod Cylinder SID125X75 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X75 |
| 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 SAID125X75 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 SAID125X75 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 SID125X75
| 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 SID125X75 Is Used
Twin-Tool Machining Station
Drives two opposing machining heads simultaneously from one piston, utilizing the equal push and pull force to maintain balanced cutting pressure on both sides.
Anti-Rotation Transfer Gate
Uses the dual-rod architecture to prevent mechanical twisting during rapid lateral part transfers across a conveyor line, ensuring smooth gate operation without bind.
Synchronized Pallet Stopper
Deploys a physical stop barrier on the front rod while the rear rod actuates a limit flag, keeping both actions perfectly synchronized for pallet routing.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X75 with the SAID125X75
To replace the discontinued SID125X75, install the SAID125X75 directly into your existing ISO 15552 mounting hardware using FA, LB, or TC brackets. If you need to resize, check neighbouring bores (100mm or 160mm) while confirming the equal-both-ways force meets your push and pull requirements. A double-rod design is the right choice when you need anti-rotation stability or must drive two mechanisms simultaneously. Since this SKU lacks the -S magnet, magnetic sensing is impossible. For any stroke over 300mm, verify your side-load limits to prevent guide bearing wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X75
- ✓ 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 SID125X75 FAQ
Yes, the SID125X75 is discontinued. The direct replacement is the SAID125X75, which matches the 125mm bore, 75mm stroke, G1/2 port, and ISO 15552 mounting interface.
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 air port is G1/2, the rod thread is M27x2, and speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X75
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X75 replacement — usually within 7-8 hours.