This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-100FTC, 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 SIJ125X100-100FTC
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-100FTC 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 SAIJ125X100-100FTC, 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 → SAIJ125X100-100FTC
- 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 SIJ125X100-100FTC
The AirTAC SIJ125X100-100FTC is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 100mm on-site, setting the end position without needing custom machining.
The direct replacement is the SAIJ125X100-100FTC, reusing the same ISO 15552 interface, FTC mount, and force ratings. The SAIJ upgrade features a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note: the stop screw sets position but is not a load lock; for held loads use SAIL or BSAI.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-100FTC Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-100FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-100FTC |
| 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 SAIJ125X100-100FTC 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 SAIJ125X100-100FTC 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 SIJ125X100-100FTC
| 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 SIJ125X100-100FTC Is Used
Press Fit Tuning
Allows operators to dial in the exact extend contact point for inserting bearings or pins on-site, avoiding hard mechanical crashes during assembly line changeovers.
Variable Depth Sealing
Provides adjustable end-of-stroke positioning for sealing heads that must accommodate different package heights without swapping the entire cylinder body.
Pallet Positioning Stops
Sets precise mechanical end stops for pusher plates handling mixed pallet sizes, ensuring positive physical positioning independent of sensor drift.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-100FTC with the SAIJ125X100-100FTC
To replace the discontinued SIJ125X100-100FTC, order the direct replacement SAIJ125X100-100FTC to reuse the existing ISO 15552 FTC mounting and G1/2 port. This 100mm adjust window allows trimming the 100mm extend stroke down to 0mm on-site. Because this SKU lacks the -S suffix, it cannot take a magnetic switch; add -S if sensing is needed. For stroke lengths >=300mm, verify side-load limits. The stop screw sets end position but is not a lock; for load holding on air loss, specify an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-100FTC
- ✓ 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 SIJ125X100-100FTC FAQ
Yes, the SIJ125X100-100FTC is discontinued. The direct replacement is the SAIJ125X100-100FTC, which matches the ISO 15552 interface, 125mm bore, 100mm stroke, 100mm adjust window, G1/2 port, and FTC mount. The SAIJ family also uses an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw window is 100mm, allowing you to trim the 100mm extend stroke down to 0mm on-site. The stop sets position but is not a load lock; use an external rod lock or SAIL/BSAI for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-100FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-100FTC replacement — usually within 7-8 hours.