This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X75-40, 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X75-40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X75-40
- 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40
The AirTAC SIJ63X75-40 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw trims the extend stroke by up to 40mm on-site, giving a usable 35-75mm window from the 75mm nominal maximum. The direct replacement is the SAIJ63X75-40, matching the interface, force, and mounting.
The SAIJ upgrade uses two Y-shaped one-way piston seals for low start-up pressure and long life. This plain SKU lacks a magnet (-S), so it cannot take a switch. The stop screw sets end position only; it is not a lock. For held loads use an external rod lock or SAIL/BSAI variant.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X75-40 |
| Bore size | Ø63 mm |
| Stroke | 75 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ63X75-40 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAIJ63X75-40 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40 Is Used
Variable Depth Drilling
A machining fixture needing field stroke tuning to accommodate different material thicknesses without swapping the entire actuator.
Adjustable Diverter Arm
A diverting mechanism on a packaging line where the extend stop is tuned on-site to route varying box sizes accurately.
Tiered Pusher Station
A material pusher that requires precise extend position changes for different pallet tiers, using the stop screw to set the exact endpoint.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40 with the SAIJ63X75-40
Replace the SIJ63X75-40 directly with the SAIJ63X75-40, retaining the M16x1.5 rod thread and FA, LB, or TC mounts. Choose the 40mm adjust window when you need field tuning from 35 to 75mm. This non-magnetic SKU cannot fit legacy CS1-B/DS1-B sensors. For strokes over 300mm, verify side-load guide tolerance. The stop screw only sets end position; it is not a load lock, so use a pilot-operated check valve for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X75-40
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-40 FAQ
Yes, the SIJ63X75-40 is discontinued. The direct replacement is the SAIJ63X75-40. It shares the identical ISO 15552 mounting interface, 63mm bore, 75mm stroke, 40mm adjust window, G3/8 port, and force ratings.
The external stop screw allows you to trim the extend stroke by up to 40mm on-site, yielding a usable extend window of 35-75mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X75-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X75-40 replacement — usually within 7-8 hours.