This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-75TC, 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 SIJ125X100-75TC
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75TC 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 SAIJ125X100-75TC, 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 → SAIJ125X100-75TC
- 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 SIJ125X100-75TC
The AirTAC SIJ125X100-75TC is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 100 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 25-100 mm extension window. The stop screw sets the end position but is not a load lock; the cylinder drifts on air loss. This SKU lacks a magnet (-S omitted), so it cannot accept a magnetic switch. It features a G1/2 port, M27x2 rod thread, and 40 mm adjustable cushions.
The direct replacement is the SAIJ125X100-75TC, sharing the same ISO 15552 interface, bore, force, port, and TC mounting. The SAIJ family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75TC Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-75TC |
| 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 SAIJ125X100-75TC 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 SAIJ125X100-75TC 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 SIJ125X100-75TC
| 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 SIJ125X100-75TC Is Used
Press Fit Tuning
Allows operators to dial in the exact 25-100 mm extend position for inserting bearings without machining custom spacers.
Variable Diverter Arms
Adjusts the extend stroke on-site to accommodate different package sizes on a sorting line without swapping cylinders.
Adjustable Stops
Sets precise material end positions at varying points along the 75 mm window to handle mixed pallet heights.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75TC with the SAIJ125X100-75TC
To replace the discontinued SIJ125X100-75TC, order the direct replacement SAIJ125X100-75TC, which preserves the 125 mm bore, 100 mm nominal stroke, 75 mm adjust window, G1/2 port, and TC mount interface. Choose the 75 mm adjust window if your application requires field tuning the extend stroke down to a 25 mm minimum. The included TC mount allows center-trunnion attachment for pivoting layouts. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors; confirm external positioning requirements. For stroke lengths of 300 mm or more on related configurations, verify side-load limits to prevent rod bending, though this 100 mm unit is well within standard bounds.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-75TC
- ✓ 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 SIJ125X100-75TC FAQ
Yes, the SIJ125X100-75TC is discontinued. The direct replacement is the SAIJ125X100-75TC, which matches the ISO 15552 interface, 125 mm bore, 100 mm stroke, 75 mm adjust window, G1/2 port, and TC mounting. The SAIJ upgrade also features a two-piece Y-shaped piston seal for longer life.
The external stop screw provides a 75 mm adjust window, allowing the 100 mm extend stroke to be shortened to 25 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-75TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-75TC replacement — usually within 7-8 hours.