This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X50-10TC, 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 SIJ125X50-10TC
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X50-10TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X50-10TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X50-10TC
- 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 SIJ125X50-10TC
The AirTAC SIJ125X50-10TC is a discontinued double-acting double-rod adjustable-stroke ISO 15552 cylinder. An external stop screw lets you trim the extend stroke by up to 10mm on-site, giving a usable 40-50mm stroke from the 50mm nominal maximum. The stop sets the end position but is not a load lock; use an external rod lock for held loads.
The direct replacement is the SAIJ125X50-10TC, retaining the ISO 15552 interface, TC mount, and force. The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This no-magnet SKU cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X50-10TC Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X50-10TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X50-10TC |
| Bore size | Ø125 mm |
| Stroke | 50 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 SAIJ125X50-10TC 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 SAIJ125X50-10TC 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 SIJ125X50-10TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 SIJ125X50-10TC Is Used
Press Fit Tuning
Final insertion depth requires exact field stroke tuning to prevent part damage, making the 10mm on-site adjust window critical for varying material thicknesses.
Divert Stop Adjustment
Actuators handling mixed product sizes need the external stop screw to shorten the extend stroke on-site, ensuring packages halt at the correct clearance.
Sealing Head Calibration
Crimping jaws require precise end position setup for different carton folds; the adjustable stop sets the exact 40-50mm extend point without reprogramming.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X50-10TC with the SAIJ125X50-10TC
To replace the discontinued SIJ125X50-10TC, map directly to the SAIJ125X50-10TC; it preserves the 50mm nominal stroke, 10mm adjust window, G1/2 port, and TC mounting interface. Select the 10mm adjust window when you need precise on-site end-position tuning without shims. The TC mount allows ISO 15552 clevis interchange. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch. For any stroke over 300mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X50-10TC
- ✓ 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 SIJ125X50-10TC FAQ
Yes, the SIJ125X50-10TC is discontinued. The direct replacement is the SAIJ125X50-10TC. It shares the same ISO 15552 interface, 125mm bore, 50mm stroke, 10mm adjust window, G1/2 port, and TC mounting. The SAIJ family also adds an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw provides a 10mm adjust window, allowing you to trim the 50mm nominal extend stroke down to 40mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X50-10TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X50-10TC replacement — usually within 7-8 hours.