This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-75S, 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 100mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X100-75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X100-75S
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S
The AirTAC SIJ125X100-75S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, giving a usable 25-100 mm window from the 100 mm nominal maximum. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
This SIJ model is discontinued; the direct replacement is the SAIJ125X100-75S, matching the ISO 15552 interface, bore, force, and mounting. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. The stop screw sets end position only; it is not a load lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-75S |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-75S 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 SAIJ125X100-75S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S Is Used
Press Fit Tuning
Allows operators to dial in the exact 25-100 mm extend position for inserting bearings without machining hard stops.
Variable Length Diverter
Adjusts the extend stroke on-site to deflect different carton sizes on a packaging line using the 75 mm trim window.
Adjustable Pusher Arm
Sets precise product push-off distances at the end of a conveyor, trimming the extend by up to 75 mm as needed.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S with the SAIJ125X100-75S
To replace the discontinued SIJ125X100-75S, order the direct replacement SAIJ125X100-75S, reusing your existing FA, LB, or TC ISO 15552 mounts and G1/2 port. Choose the 75 mm adjust window when you need on-site end-position flexibility across a 25-100 mm extend range. The -S magnet enables position sensing. For strokes at or above 300 mm, verify side-load limits to prevent guide wear. The stop screw sets position only; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-75S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75S FAQ
Yes, the SIJ125X100-75S is discontinued. The direct replacement is the SAIJ125X100-75S, matching the ISO 15552 interface, 125 mm bore, 100 mm stroke, 75 mm adjust window, and G1/2 port. The SAIJ family uses an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw trims the extend stroke by up to 75 mm on-site, yielding a usable 25-100 mm window. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-75S replacement — usually within 7-8 hours.